Accounting Policies [Abstract] Business, Basis of Presentation and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Debt Disclosure [Abstract] Schedule of Carrying Values of Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Contractual Maturities of Debt and Capital Lease Obligations Schedule of Maturities of Long-term Debt [Table Text Block] Segment Reporting [Abstract] Segments and Related information [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Segments [Member] Operating Segments [Member] Corporate [Member] Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Communications [Member] Communications [Member] Engineering, construction, maintenance and customer fulfillment activities related to communications infrastructure primarily for wireless and wireline/fiber communications and install-to-the-home customers, and, to a lesser extent, infrastructure for utilities, among others. Oil and Gas [Member] Oil And Gas 1 [Member] Engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries. Electrical Transmission [Member] Electrical Transmission [Member] The engineering, construction and maintenance of electrical transmission lines and substations primarily for the energy and utility industries. Power Generation and Industrial [Member] Power Generation and Industrial [Member] Installation and construction of conventional and renewable power facilities, related electrical transmission infrastructure, ethanol/biofuel facilities and various types of heavy civil and industrial infrastructure, primarily for the energy, utility and other end-markets. Other [Member] Other Segments [Member] Segment and Related Information [Line Items] Segment Reporting Information [Line Items] Assets: Segment Reporting Information, Additional Information [Abstract] Assets Assets Leases [Abstract] Operating Leases [Table] Schedule of Operating Leased Assets [Table] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Lease Terms in Excess of One Year [Member] Lease Term In Excess Of One Year [Member] Lease term in excess of one year. Lease Terms of One Year or Less [Member] Lease Term Less Than One Year [Member] Lease term of one year or less. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Operating Leases [Line Items] Operating Leased Assets [Line Items] Operating leases, term of contract (in years) Lessee, Operating Lease, Term of Contract Operating leases, rent and related expense (in dollars) Operating Leases, Rent Expense, Net Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Non-Recurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Investment [Axis] Investment Issuer [Axis] Investment [Domain] Investment Issuer [Domain] Pensare [Member] Pensare [Member] Pensare Acquisition Corp ("Pensare") (business name) Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario, Unspecified [Domain] Plan [Member] Scenario, Plan [Member] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Common Stock [Member] Common Stock [Member] Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Equity investment and warrants, amount paid (in dollars) Payments to Acquire Long-term Investments Equity investment, ownership percentage Equity Investment Without Readily Determinable Fair Value, Ownership Percentage The percentage of ownership of common stock or equity participation in an investee which does not have a readily determinable fair value. Excludes proportionately consolidated investees and investees accounted for under the equity method of accounting. Derivative instruments, number held Derivative, Number of Instruments Held Investment, restriction period (in years) Investment Restriction Period Period of restriction related to the sale or transfer of an investment, after the completion of a business combination by the investee. Warrants, exercise price (in dollars per share) Investment Warrants, Exercise Price Debt instruments, accrued interest payable Interest Payable, Current Share-based Compensation [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2013 Incentive Plan [Member] 2013 Incentive Plan [Member] The MasTec, Inc. 2013 Incentive Compensation Plan ("2013 Incentive Plan"). ESPPs [Member] Employee Stock Plans [Member] The MasTec, Inc. Bargaining Units Employee Stock Purchase Plan (the “2013 Bargaining Units ESPP”) and the MasTec, Inc. 2011 Amended and Restated Employee Stock Purchase Plan as amended (the “2011 ESPP”), together known as the “ESPPs”. Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Shares [Member] Restricted Stock And Restricted Stock Units [Member] Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met ("Restricted Stock") or share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met ("Restricted Stock Units"). Restricted Stock and Restricted Stock Units are together referred to as "Restricted Shares". Employee Stock Purchase Plans [Member] Employee Stock [Member] Stock-Based Compensation and Other Employee Benefit Plans [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation plans, description Share-based Compensation Arrangement by Share-based Payment Award, Description Stock-based compensation plans, number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Stock-based compensation plans, number of shares available for future grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Non-cash stock-based compensation expense (in dollars) Allocated Share-based Compensation Expense Stock-based compensation, income tax benefits (in dollars) Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock based compensation, vested awards, net income tax benefits (deficiency) (in dollars) Employee Service Share-Based Compensation, Net Tax Benefit (Deficiency) From Vesting Of Share-Based Payment Awards Amount of net tax benefit (deficiency) from vesting of share-based payment awards. Property, Plant and Equipment [Abstract] Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Income Tax Disclosure [Abstract] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and Contingencies Disclosure [Abstract] Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable, Net, Less BIEC [Member] Accounts Receivable [Member] Revenue [Member] Sales Revenue, Services, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Credit Concentration Risk [Member] Credit Concentration Risk [Member] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Customers with Largest Net Accounts Receivable Positions [Member] Disclosed Customers With Highest Net Accounts Receivable Positions [Member] Disclosed customers who accounted for the highest net accounts receivable positions, which represents accounts receivable, net, less billing in excess of costs and earnings. Customer with Largest Net Accounts Receivable Position [Member] Customer With Highest Net Accounts Receivable Position1 [Member] Customer who accounted for the highest net accounts receivable position, which represents accounts receivable, net, less billings in excess of costs and earnings. Customer with Second Largest Net Accounts Receivable Position [Member] Customer With Second Highest Net Accounts Receivable Position [Member] Customer who accounted for the second highest net accounts receivable position, which represents accounts receivable, net, less billings in excess of costs and earnings. Customer With Third Highest Net Accounts Receivable Position [Member] Customer With Third Highest Net Accounts Receivable Position [Member] Customer who accounted for the third highest net accounts receivable position, which represents accounts receivable, net, less billings in excess of costs and earnings. Ten Largest Customers [Member] Ten Largest Customers1 [Member] Ten largest customers. Concentration Risk [Line Items] Concentration Risk [Line Items] Number of customers Number Of Customers1 Number of customers. Concentration risk, percentage of total Concentration Risk, Percentage Guarantees and Product Warranties [Abstract] Guarantees and Product Warranties [Abstract] Other Guarantees [Table] Long-Duration Contracts, Assumptions, by Product and Guarantee [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Subsidiaries [Member] Subsidiaries [Member] Other Guarantees [Line Items] Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] Other guarantees, description Guarantor Obligations, Origin and Purpose General warranty, description Standard Product Warranty Description General warranty, period (in years) Warranty Period, Expected Term Period the Company generally warrants the work it performs following substantial completion of a project, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months and thirteen days. Capital Leases Capital Lease Obligations [Abstract] Future minimum lease commitments, 2019 Capital Leases, Future Minimum Payments Due, Next Twelve Months Future minimum lease commitments, 2020 Capital Leases, Future Minimum Payments Due in Two Years Future minimum lease commitments, 2021 Capital Leases, Future Minimum Payments Due in Three Years Future minimum lease commitments, 2022 Capital Leases, Future Minimum Payments Due in Four Years Future minimum lease commitments, 2023 Capital Leases, Future Minimum Payments Due in Five Years Future minimum lease commitments, thereafter Capital Leases, Future Minimum Payments Due Thereafter Total minimum lease payments Capital Leases, Future Minimum Payments Due Less amounts representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Total capital lease obligations, net of interest Capital Lease Obligations Less current portion Capital Lease Obligations, Current Long-term portion of capital lease obligations, net of interest Capital Lease Obligations, Noncurrent Operating Leases Leases, Operating [Abstract] Future minimum lease commitments, 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months Future minimum lease commitments, 2020 Operating Leases, Future Minimum Payments, Due in Two Years Future minimum lease commitments, 2021 Operating Leases, Future Minimum Payments, Due in Three Years Future minimum lease commitments, 2022 Operating Leases, Future Minimum Payments, Due in Four Years Future minimum lease commitments, 2023 Operating Leases, Future Minimum Payments, Due in Five Years Future minimum lease commitments, thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Capital Leases [Table] Schedule of Capital Leased Assets [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Property and Equipment [Member] Property, Plant and Equipment [Member] Capital Leases [Line Items] Capital Leased Assets [Line Items] Assets held under capital lease, gross Capital Leased Assets, Gross Assets held under capital lease, net Capital Leases, Balance Sheet, Assets by Major Class, Net Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] 2017 Acquisitions [Member] 2017 Acquisitions [Member] Acquisitions completed during the year 2017. Business Combinations [Line Items] Business Acquisition [Line Items] Acquisition consideration: Business Combination, Consideration Transferred [Abstract] Cash Payments to Acquire Businesses, Gross Estimated fair value of contingent consideration (earn-out liability) Business Combination, Consideration Transferred, Liabilities Incurred Total consideration transferred Business Combination, Consideration Transferred Identifiable assets acquired and liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Current assets, primarily composed of accounts receivable and $2.8 million of cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Property and equipment and other long-term assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Amortizing intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Current liabilities, including current portion of capital lease obligations and long-term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Long-term debt, including capital lease obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Deferred income taxes and other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Goodwill Goodwill Total net assets acquired, including goodwill Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Eliminations [Member] Intersegment Eliminations [Member] Utilities [Member] Utilities [Member] Customers of the business entity whose end-market products or services are in the utilities industry. Revenue: Segment Reporting Information, Revenue for Reportable Segment [Abstract] Revenue (in dollars) Revenues Utilities customers, percentage of Communications segment revenue Multiemployer Plans [Abstract] Schedule of Multiemployer Plans [Table] Schedule of Multiemployer Plans [Table] Multiemployer Plan Type [Axis] Multiemployer Plan Type [Axis] Multiemployer Plans Type [Domain] Multiemployer Plans Type [Domain] Multiemployer Plans, Pension [Member] Multiemployer Plans, Pension [Member] Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Schedule of Multiemployer Pension Plans Schedule of Multiemployer Plans [Table Text Block] Schedule of Covered Employees and Contributions, Multiemployer Plans Schedule of Costs of Retirement Plans [Table Text Block] Cash proceeds (in dollars) Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Common shares issued (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Weighted average price per share (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average per share grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Information (Unaudited) Quarterly Financial Information [Table Text Block] Selected Quarterly Financial Information [Abstract] Selected Quarterly Financial Information [Abstract] Revenue Costs of revenue, excluding depreciation and amortization Cost of Services, Excluding Depreciation, Depletion, and Amortization Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to MasTec, Inc. Net Income (Loss) Attributable to Parent Earnings per share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Schedule II - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Lifeshield [Member] Lifeshield [Member] Lifeshield, LLC ("Lifeshield") (Business name) Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Fair Value, Financial Instruments Measured on a Recurring Basis [Line Items] Fair value investment, carrying amount Equity Securities, FV-NI Fair value investment, ownership percentage Equity Investment Fv-Ni, Ownership Percentage The percentage ownership of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Other investment, proceeds Proceeds from Sale and Maturity of Other Investments Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Management [Member] Management [Member] Executive Officers [Member] Executive Officer [Member] Immediate Family Member of Management [Member] Immediate Family Member of Management or Principal Owner [Member] Chairman, Board of Directors [Member] Board of Directors Chairman [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Subcontracting Arrangements [Member] Subcontracting Arrangements [Member] The performance of services under a subcontracting arrangement. Equipment [Member] Equipment [Member] Employee Leasing Arrangements [Member] Employment Contracts [Member] Services [Member] Service Agreements [Member] Property Lease [Member] Property Subject to Operating Lease [Member] Leases [Member] Lease Agreements [Member] Related Customer [Member] Related Customer [Member] Customer that has a related party relationship with the entity, either by ownership or management affiliation. Aircraft [Member] Air Transportation Equipment [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Number of additional management employees, subcontracting arrangement Entity Number of Employees Payments or amounts incurred, related party Related Party Transaction, Expenses from Transactions with Related Party Proceeds from sale of equipment Proceeds from Sale of Machinery and Equipment Payables, related party Accounts Payable, Related Parties Charges, related party Related Party Transaction, Other Revenues from Transactions with Related Party Receivables, related party Due from Related Parties Revenue, related party Revenue from Related Parties Receivables, related party Accounts Receivable, Related Parties New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Forecast [Member] Scenario, Forecast [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-15 [Member] Accounting Standards Update 2016-15 [Member] ASU 2016-02 [Member] Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Payments for contingent consideration liabilities, operating activities, reclassification adjustment (in dollars) Payment for Contingent Consideration Liability, Operating Activities Operating leases, right-of-use assets Operating Lease, Right-of-Use Asset Operating leases, liabilities Operating Lease, Liability Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-Term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Other Credit Facilities [Member] Foreign Line of Credit [Member] Line of Credit [Member] Line of Credit [Member] Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] Canadian Dollars [Member] Canada, Dollars Weighted Average [Member] Weighted Average [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter of Credit [Member] Letter of Credit [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Standby Letters of Credit [Member] Standby Letters of Credit [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Line of credit facility, maximum borrowing capacity (in dollars) Line of Credit Facility, Maximum Borrowing Capacity Long-term debt obligations (in dollars) Long-term Debt, Gross Line of credit facility, interest rate (percentage) Line of Credit Facility, Interest Rate at Period End Debt instrument, rationale for classification as long-term debt Line of Credit Facility, Rationale for Classification as Long-term Debt Letters of credit issued Letters of Credit Outstanding, Amount Schedule of Goodwill [Table] Schedule of Goodwill [Table] Segments [Domain] Goodwill [Line Items] Goodwill [Line Items] Goodwill, gross Goodwill, Gross Goodwill, accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Goodwill, net Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, net, beginning balance Additions from new business combinations Goodwill, Acquired During Period Measurement period adjustments, net Goodwill, Purchase Accounting Adjustments Goodwill impairment Goodwill, Impairment Loss Currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, net, ending balance Pacer [Member] Pacer [Member] Pacer Construction Holdings Corporation and its affiliated operating companies ("Pacer") (business name). Joint Venture [Member] Corporate Joint Venture [Member] Segment reporting information, factors used to identify entity's reportable segments Segment Reporting, Factors Used to Identify Entity's Reportable Segments Number of operating segments Number of Operating Segments Number of reportable segments Number of Reportable Segments Segment reporting information, description of products and services Segment Reporting Information, Description of Products and Services Segment reporting, description of all other segments Segment Reporting, Description of All Other Segments Segment reporting, transactions between reportable segments Segment Reporting, Measurement for Transactions Between Reportable Segments Segment reporting, additional information about entity's reportable segments Segment Reporting, Additional Information about Entity's Reportable Segments Goodwill, pre-tax impairment charge (in dollars) Project gains (in dollars) Project Gains Projects gains are defined as project revenue, less project costs of revenue, including project-related depreciation, in particular, on construction contracts accounted for under the cost-to-cost method, for which the recorded amounts require estimates of costs to complete. Project losses (in dollars) Loss on Contracts Restructuring charges (in dollars) Restructuring Charges Equity [Abstract] Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Activity, Restricted Shares Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Employee Stock Purchase Plans Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Goodwill and Intangible Assets [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Terminal Growth Rate [Member] Measurement Input, Long-term Revenue Growth Rate [Member] Number of Years of Discounted Cash Flows [Member] Number Of Years Of Discounted Cash Flows [Member] Measurement input using the number of years for which projections are incorporated into a cash flow analysis before the terminal year value is estimated in connection with impairment testing. Discount Rate [Member] Measurement Input, Discount Rate [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Goodwill [Member] Goodwill [Member] Indefinite-lived Intangible Assets [Member] Indefinite-lived Intangible Assets [Member] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Reporting Unit Or Intangible, Quantitative Testing, Impairment Charge Recorded [Member] Reporting Unit Or Intangible For Which Impairment Charge Was Recorded [Member] The reporting unit or indefinite lived intangible asset for which an impairment charge was recorded. Reporting Unit Or Intangible, Quantitative Testing [Member] Reporting Unit Or Intangible Quantitative Testing Estimated Fair Value Not Substantially Exceed Carrying Value [Member] The reporting unit or indefinite lived intangible asset(s) for which quantitative testing was performed, and for which the estimated fair value did not substantially exceed the carrying value. Reporting Unit A, Quantitative Testing [Member] Reporting Unit A Quantitative Testing, Estimated Fair Value Not Substantially Exceeding Carrying Value [Member] The reporting unit A for which quantitative testing was performed, and for which the estimated fair value did not substantially exceed the carrying value. Reporting Unit B, Quantitative Testing [Member] Reporting Unit B Quantitative Testing, Estimated Fair Value Not Substantially Exceeding Carrying Value [Member] The reporting unit B for which quantitative testing was performed, and for which the estimated fair value did not substantially exceed the carrying value. Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Pre-Qualifications [Member] Contractual Rights [Member] Trade Names [Member] Trade Names [Member] Goodwill and Indefinite-Lived Intangible Assets [Line Items] Indefinite-lived Intangible Assets [Line Items] Percentage of aggregated components in reporting unit Goodwill Impairment Testing Percentage Of Components Aggregated For a business entity, represents the percentage of components of an operating segment that were aggregated into a reporting unit for purposes of goodwill impairment review or testing. Number of aggregated components in reporting unit Goodwill Impairment Testing, Number Of Components Aggregated For a business entity, represents the number of components of an operating segment that were aggregated into a reporting unit for purposes of goodwill impairment review or testing. Goodwill impairment testing, number of reporting units Number of Reporting Units Goodwill impairment testing, measurement input Goodwill Impairment Testing, Measurement Input Value of input used in goodwill impairment testing. Goodwill, carrying amount (in dollars) Goodwill impairment testing, reporting unit, percentage of estimated fair value in excess of carrying value Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount Impairment testing, discount rate sensitivity analysis, spread on discount rate for which evaluation was completed (percentage) Impairment Testing, Discount Rate Sensitivity Analysis, Spread On Discount Rate For Which Evaluation Was Completed For sensitivity analysis purposes, represents the percentage points added to or deducted from the discount rate used in a discounted cash flow analysis in connection with impairment testing. Indefinite-lived intangible assets, impairment testing, measurement input Indefinite-Lived Intangible Assets Impairment Testing, Measurement Input Value of input used in impairment testing for indefinite-lived intangible assets. Indefinite-lived intangible assets, carrying amount (in dollars) Indefinite-lived Intangible Assets (Excluding Goodwill) Indefinite-lived intangible assets impairment testing, percentage of estimated fair value in excess of carrying value Indefinite-Lived Intangible Asset Percentage Of Fair Value In Excess Of Carrying Amount Percentage of fair value of indefinite-lived intangible asset in excess of carrying amount. Depreciation and Amortization: Depreciation, Depletion and Amortization [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Waha JVs [Member] Waha JVs [Member] Trans-Pecos Pipeline, LLC ("TPP") (business name) and Comanche Trail Pipeline, LLC ("CTP") (business name) and together, referred to as the Waha JVs. Credit Facility [Member] Domestic Line of Credit [Member] Equity Investee [Member] Investee [Member] Number of pipelines in operation Number Of Pipelines In Operation Number of pipelines in operation at the balance sheet date. Equity method investments, equity and other contributions Payments to Acquire Equity Method Investments Equity method investments, equity in earnings (losses) Income (Loss) from Equity Method Investments Equity method investments, cumulative undistributed earnings Retained Earnings, Undistributed Earnings from Equity Method Investees Equity method investments, distributions of earnings received, operating cash flows Proceeds from Equity Method Investment, Distribution Equity method investments, net investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Revenue, related parties Receivables, net of BIEC, related parties Accounts Receivable, Net Of Billings In Excess Of Costs, Related Parties Amount of accounts receivable, net of billings in excess of costs, arising from transactions with related parties. Receivables are the amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Includes contract assets, net. Billings in excess of costs is the liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date. Unrealized gains on equity investee activity Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Unrealized gains on equity investee activity, net of tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Equity Method Investee [Member] Equity Method Investee [Member] Financing Arrangements [Member] Financing Arrangements [Member] The performance of services under a vendor financing arrangement. Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Payments, related party Advances outstanding from related party, net Due from Affiliates Proceeds from settlement of advances, related party Proceeds from Collection of Advance to Affiliate Condensed Financial Statements, Supplemental Guarantor Information [Abstract] -- None. No documentation exists for this element. -- Supplemental Guarantor Financial Information Condensed Financial Statements [Text Block] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] AT&T (including DIRECTV) [Member] AT&T1 [Member] AT&T, including DIRECTV (business name). EQT Corporation [Member] EQT Corporation [Member] EQT Corporation (business name). Energy Transfer Affiliates [Member] Energy Transfer Affiliates [Member] Energy Transfer affiliates (business name). Revenue, Significant Customer [Line Items] Revenue, Major Customer [Line Items] Schedule Of Other Intangible Assets [Table] ScheduleOfIntangibleAssets [Table] Schedule of intangible assets, excluding goodwill. Non-Amortizing Intangible Assets [Axis] Non-Amortizing Intangible Assets, Major Class Name [Domain] Amortizing Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Amortizing Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships and Backlog [Member] Customer-Related Intangible Assets [Member] Other Amortizing Intangible Assets [Member] Other Intangible Assets [Member] Other Intangible Assets [Line Items] Intangible Assets [Line Items] Line items for intangible assets, excluding goodwill. Other intangible assets, non-amortizing Other intangible assets, amortizing, gross Finite-Lived Intangible Assets, Gross Other intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Other Intangible Assets [Roll Forward] Intangible Assets (Excluding Goodwill) [Roll Forward] Rollforward of intangible assets, excluding goodwill. Other intangible assets, non-amortizing, beginning balance Other intangible assets, net, amortizing, beginning balance Finite-Lived Intangible Assets, Net Other intangible assets, net, beginning balance Intangible Assets, Net (Excluding Goodwill) Additions from new business combinations, non-amortizing intangible assets Indefinite-lived Intangible Assets Acquired Additions from new business combinations, amortizing intangible assets Finite-lived Intangible Assets Acquired Additions from new business combinations Intangible Assets Acquired, Gross (Excluding Goodwill) Amount of increase in intangible assets, excluding goodwill, from an acquisition. Measurement period adjustments, non-amortizing intangible assets Indefinite-lived Intangible Assets, Purchase Accounting Adjustments Measurement period adjustments, amortizing intangible assets Finite-Lived Intangible Assets, Purchase Accounting Adjustments Measurement period adjustments Intangible Assets Excluding Goodwill, Purchase Accounting Adjustments Amount of increase (decrease) to intangible assets, excluding goodwill, from purchase accounting adjustments. Amortization expense Amortization of Intangible Assets Currency translation adjustments, non-amortizing intangible assets Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss) Currency translation adjustments, amortizing intangible assets Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Currency translation adjustments Intangible Assets, Gross (Excluding Goodwill), Translation Adjustments Amount of foreign currency translation gain (loss) which increases (decreases) intangible assets, excluding goodwill. Other intangible assets, non-amortizing, ending balance Other intangible assets, net, amortizing, ending balance Other intangible assets, net, ending balance Remaining weighted average amortization period (in years) Finite-Lived Intangible Assets, Remaining Amortization Period Related Party Transactions Related Party Transactions Disclosure [Text Block] Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Reportable Legal Entities [Member] Reportable Legal Entities [Member] Eliminations [Member] Consolidation, Eliminations [Member] MasTec, Inc. [Member] Parent Company [Member] Guarantor Subsidiaries [Member] Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Condensed Consolidating Statements of Cash Flows [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments to Acquire Productive Assets Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Payments for other investments Payments to Acquire Other Investments Proceeds from other investments Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from credit facilities Proceeds from Long-term Lines of Credit Repayments of credit facilities Repayments of Long-term Lines of Credit Repayments of other borrowings and capital lease obligations, net Repayments of Other Debt Payments of acquisition-related contingent consideration Payment for Contingent Consideration Liability, Financing Activities Payments to non-controlling interests, including acquisition of interests and distributions Payments to Noncontrolling Interests Proceeds from (payments for) stock-based awards, net Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Repurchases of common stock Payments for Repurchase of Common Stock Other financing activities, net Proceeds from (Payments for) Other Financing Activities Net financing activities and advances from (to) consolidated affiliates Net Financing Activities And Advances From (To) Consolidated Affiliates The cash inflow (outflow) from financing activities and (advances to) collection of money previously advanced to consolidated entities. Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of currency translation on cash Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents - beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents - end of period Accumulated Other Comprehensive Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign Currency [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Other [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Other Comprehensive Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated other comprehensive loss, beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Unrealized (losses) gains, net of tax Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss, ending balance Contractual Maturities of Debt and Capital Lease Obligations Maturities of Long-term Debt and Capital Lease Obligations [Abstract] Contractual maturities of debt and capital lease obligations, 2019 Long-term Debt and Capital Lease Obligations, Repayments of Principal in Next Twelve Months Contractual maturities of debt and capital lease obligations, 2020 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two Contractual maturities of debt and capital lease obligations, 2021 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three Contractual maturities of debt and capital lease obligations, 2022 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four Contractual maturities of debt and capital lease obligations, 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five Contractual maturities of debt and capital lease obligations, thereafter Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five Total long-term debt obligations Long-term Debt and Capital Lease Obligations, Including Current Maturities, Gross Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt and capital lease obligations including current maturities. Multiemployer plans, general nature Multiemployer Plans, General Nature Multiemployer plans, underfunded status, description Multiemployer Plans, Underfunded Status, Description Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Schedule II - Valuation and Qualifying Accounts [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Schedule II - Valuation and Qualifying Accounts Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Schedule II - Valuation and Qualifying Accounts [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts [Member] SEC Schedule, 12-09, Allowance, Credit Loss [Member] Costs and Earnings in Excess of Billings Allowance [Member] Allowance for CEIB [Member] A valuation allowance established for amounts relating to costs and earnings in excess of billings that are expected to be uncollectible. Valuation Allowance for Inventory [Member] SEC Schedule, 12-09, Reserve, Inventory [Member] Valuation Allowance for Deferred Tax Assets [Member] SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Schedule II - Valuation and Qualifying Accounts [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Schedule II - Valuation and Qualifying Accounts [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance at beginning of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Charges to cost and expense SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Other additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account (Deductions) SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Balance at end of period Components of Deferred Tax Assets and Liabilities [Abstract] Deferred Tax Assets and Liabilities [Table] Deferred Tax Assets And Liabilities [Table] A table or schedule providing information pertaining to deferred tax assets and/or deferred tax liabilities. Equity Investee [Member] Income Taxes [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Accrued insurance Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Self Insurance Operating loss carryforwards and tax credits Deferred Tax Assets, Operating Loss Carryforwards Compensation and benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Bad debt Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Unrealized gains and losses Deferred Tax Assets, Unrealized Gains And Losses Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized net losses (gains). Other Deferred Tax Assets, Other Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Goodwill Deferred Tax Liabilities, Goodwill Other intangible assets Deferred Tax Liabilities, Intangible Assets Gain on remeasurement of equity investee Deferred Tax Liabilities, Tax Deferred Income Revenue recognition Deferred Tax Liabilities, Revenue Recognition Amount of deferred tax liability attributable to taxable temporary differences from revenue recognition. Investments in unconsolidated entities Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Income Tax Liabilities, Net Condensed Financial Statements [Table] Condensed Financial Statements [Table] Senior Notes [Member] Senior Notes [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 4.875% Senior Notes [Member] Four Point Eight Seven Five Percent Senior Notes [Member] 4.875% Senior Notes Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Debt instrument, interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Debt instrument, principal amount (in dollars) Debt Instrument, Face Amount Debt instrument, maturity date Debt Instrument, Maturity Date Debt instrument, interest payment terms Debt Instrument, Payment Terms Debt instrument, guarantees Debt Instrument, Collateral Debt instrument, redemption description Debt Instrument, Redemption, Description Debt instrument, percentage of principal that may be redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt instrument, restrictive covenants Debt Instrument, Restrictive Covenants Summarized Financial Information of Equity Method Investments [Line Items] Equity Method Investment, Summarized Financial Information [Abstract] Current assets Equity Method Investment, Summarized Financial Information, Current Assets Long-term assets Equity Method Investment, Summarized Financial Information, Noncurrent Assets Total assets Equity Method Investment, Summarized Financial Information, Assets Current liabilities Equity Method Investment, Summarized Financial Information, Current Liabilities Long-term liabilities Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities Revenue Equity Method Investment, Summarized Financial Information, Revenue Net income (loss) Equity Method Investment, Summarized Financial Information, Net Income (Loss) Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation (losses) gains, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Unrealized gains on equity investee activity, net of tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (loss) income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to MasTec, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Equity Award [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation, vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Stock-based compensation, shares withheld (in shares) Shares Paid For Exercise Price And Tax Withholding For Share Based Compensation For net-share settlement of share-based awards, when shares are withheld for exercise price of options and/or the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to pay the employer. Stock-based compensation, payments for employee tax obligations to taxing authorities (in dollars) Payments Related to Tax Withholding for Share-based Compensation Stock-based compensation, purchase price of common stock, percentage Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Stock-based compensation, fair value assumptions, method used Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used Stock-based compensation, fair value assumptions, expected dividend yield (percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Entity Central Index Key Entity Central Index Key Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Shell Company Entity Shell Company Entity Public Float (in dollars) Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Revolving Loans [Member] Revolving Credit Facility [Member] Term Loan [Member] Loans Payable [Member] Letters of Credit [Member] Swing Line Loans [Member] Bridge Loan [Member] Accordion Feature [Member] Accordion Feature [Member] Option to increase revolving commitments and/or establish additional term loan tranches. Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurocurrency Rate [Member] Eurocurrency Rate [Member] Interest rate at which a bank borrows funds from other banks in a foreign market. Base Rate [Member] Base Rate [Member] Federal Funds Rate [Member] Federal Funds Purchased [Member] Bank of America Prime Rate [Member] Prime Rate [Member] Commercial and/or Financial Standby [Member] Financial Standby Letter of Credit [Member] Performance Standby [Member] Permitted Acquisition [Member] Permitted Acquisition [Member] A permitted acquisition or series of permitted acquisitions as defined in the Credit Facility agreement. Line of credit facility, maximum borrowing capacity Line of credit facility, frequency of payments Line of Credit Facility, Frequency of Payments Line of credit facility, amount of quarterly principal installment payments Line of Credit Facility, Periodic Payment, Principal Line of credit facility, revolving loans sublimit, Canadian dollars and/or Mexican pesos Line Of Credit, Revolving Loan Sublimit, Canadian Dollars Or Mexican Pesos Sublimit or portion of maximum borrowing capacity available on an existing line of credit in Canadian dollars and/or Mexican pesos. Line of credit facility, capacity available for letters of credit sublimit, Canadian dollars and/or Mexican pesos Line Of Credit, Letter Of Credit Sublimit, Canadian Dollars Or Mexican Pesos The portion of the maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for letters of credit that is available in Canadian dollars and/or Mexican pesos. Line of credit facility, swing line loans sublimit Line of Credit, Revolving Loan Sublimit Sublimit or portion of maximum borrowing capacity available on an existing line of credit. Line of credit facility, variable interest rate, margin over base rate (percentage) Debt Instrument, Basis Spread on Variable Rate Line of credit facility, variable interest rate, margin over base rate, base rate equals option (i) (percentage) Base Rate Option One, Debt Instrument, Basis Spread On Variable Rate Percentage added to the reference rate to compute the variable rate on the debt instrument. The reference rate or base rate for this option equals the Federal Funds Rate plus a certain percentage. Line of credit facility, variable interest rate, margin over base rate, base rate equals option (ii) (percentage) Base Rate Option Two, Debt Instrument, Basis Spread On Variable Rate Percentage points added to the reference rate to compute the variable rate on the debt instrument. The reference rate or base rate for this option equals the Bank of America's prime rate. Line of credit facility, variable interest rate, margin over base rate, base rate equals option (iii) (percentage) Base Rate Option Three, Debt Instrument, Basis Spread On Variable Rate Percentage points added to the reference rate to compute the variable rate on the debt instrument. The reference rate or base rate for this option equals the Eurocurrency Rate plus a certain percentage. Line of credit facility, unused credit facility commitment fee (percentage) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of credit facility, amount of borrowings denominated in foreign currencies Line Of Credit Facility, Amount Denominated In Foreign Currencies The carrying value as of the balance sheet date of the portion of the revolving credit facility obligation which is denominated in foreign currencies. Line of credit facility, letters of credit issued Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Line of credit facility, capacity available for letters of credit Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases Line of credit facility, remaining borrowing capacity in Canadian dollars or Mexican pesos Line Of Credit Facility, Remaining Borrowing Capacity In Foreign Currency Amount of borrowing capacity currently available in either Canadian dollars or Mexican pesos that is included in the total amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Line of credit facility, combined subsidiary guarantors percentage of consolidated EBITDA threshold (percentage) Percentage Of Consolidated EBITDA Threshold, Combined Subsidiary Guarantors 1 Ratio of Loan Party EBITDA as of the most recent four quarters to Adjusted Consolidated EBITDA as of the most recent four quarters. Line of credit facility, individual domestic subsidiary guarantors percentage of consolidated EBITDA threshold (percentage) Percentage Of Consolidated EBITDA Threshold, Individual Subsidiary Guarantors 1 Ratio of Loan Party EBITDA as of the most recent four quarters to Adjusted EBITDA as of the most recent four quarters for any domestic subsidiary. Line of credit facility, required consolidated leverage ratio (in multiple) Ratio of Indebtedness to Net Capital Line of credit facility, required consolidated interest coverage ratio (in multiple) Interest Coverage Ratio The ratio which is calculated by dividing earnings before interest and taxes for a period by interest expense for the same period. Line of credit facility, adjusted consolidated leverage ratio, permitted acquisitions amount, minimum threshold Permitted Acquisitions Amount Adjusted Ratio of Indebtedness to Net Capital Minimum threshold amount of consideration for permitted acquisition or series of permitted acquisitions during a fiscal quarter in order to permit a higher consolidated leverage ratio range for such a fiscal quarter and the subsequent two fiscal quarters. Line of credit facility, adjusted consolidated leverage ratio, permitted acquisitions, maximum number of times right may be exercised Number Of Times Right May Be Exercised Number of times during the term of the Credit Facility that the right to permit the consolidated leverage ratio to exceed a specified threshold may be or has been exercised. Capital Expenditures: Capital expenditures Receivables [Abstract] Schedule of Accounts Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Receivables, Non-Recourse Arrangement [Member] Financing Receivable [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense, Net [Member] Interest Expense [Member] Schedule of Accounts Receivable, Net of Allowance, and Contract Assets and Liabilities [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Retainage, percentage of contract billings Retainage, Percent Of Contract Billings Percentage of contract billings that a customer is permitted to retain until the final contract settlement because of retainage provisions in a contract. Retainage, expected collection period (in years) Retainage, Expected Collection, Period Period in which billed retainage amounts are expected to be collected, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Billings in excess of costs and earnings Billings in Excess of Cost, Current Revenue recognition, BIEC, revenue recognized Contract with Customer, Liability, Revenue Recognized Contract liabilities Contract with Customer, Liability, Current Non-recourse financing arrangement, discount charge Gain (Loss) on Sale of Accounts Receivable 2018 Acquisitions [Member] 2018 Acquisitions [Member] Acquisitions completed during the year 2018. Construction Management Firm Specializing in Steel Building Systems [Member] Construction Management Firm Specializing In Steel Building Systems [Member] A construction management firm specializing in steel building systems. Business combinations, percentage of interests acquired Business Acquisition, Percentage of Voting Interests Acquired Business combinations, cash paid (in dollars) Contingent consideration, earn-out liability Business Combination, Contingent Consideration, Liability Business combinations, contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high (in dollars) Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Business combinations, contingent consideration liabilities, range of potential earn-out liabilities, maximum unlimited Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Maximum Unlimited Schedule of Financial Information by Reportable Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Consolidated Income before Income Taxes to EBITDA Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Schedule of Significant Customers, Revenue Concentration Information Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Stock-Based Compensation and Other Employee Benefit Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Allowance for Doubtful Accounts [Rollforward] Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for doubtful accounts at beginning of year Allowance for Doubtful Accounts Receivable, Current Provision for doubtful accounts Provision for Doubtful Accounts Amounts charged against the allowance Allowance for Doubtful Accounts Receivable, Write-offs Allowance for doubtful accounts at end of year Line of credit facility, description of variable rate Debt Instrument, Description of Variable Rate Basis Line of credit facility, interest rate description, letters of credit Line of Credit Facility, Interest Rate Description Line of credit facility, commitment fee description Line of Credit Facility, Commitment Fee Description Line of credit facility, collateral Line of Credit Facility, Collateral Line of credit facility, covenant terms Line of Credit Facility, Covenant Terms Commitments and Contingencies [Table] Loss Contingencies [Table] Performance and Payment Bonds [Member] Performance Guarantee [Member] Financial Guarantees [Member] Surety Bonds [Member] Surety Bond [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Self-Insurance [Member] Uninsured Risk [Member] Insurance Policies By Type [Axis] Product and Service [Axis] Insurance Policies By Type [Domain] Product and Service [Domain] Workers' Compensation, General and Automobile Policies [Member] Property, Liability and Casualty Insurance Product Line [Member] Employee Group Medical Claims Policy [Member] Group Insurance Policies [Member] Workers' Compensation [Member] Accident and Health Insurance Product Line [Member] Other Long-Term Liabilities [Member] Other Noncurrent Liabilities [Member] Other Long-Term Assets [Member] Other Noncurrent Assets [Member] Collateral [Axis] Collateral [Axis] Collateral [Domain] Collateral [Domain] Cash [Member] Cash [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Outstanding bonds, amount Guarantor Obligations, Maximum Exposure, Undiscounted Bonded projects, estimated costs to complete Estimated Costs To Complete Projects Secured By Bonds Reflects the amount of estimated costs to complete projects that are secured by outstanding performance and/or payment bonds as of the balance sheet date. Self-insurance reserve Self Insurance Reserve Self-insurance reserve, non-current Self Insurance Reserve, Noncurrent Cash collateral held by insurance carriers Deposit Assets Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] State [Member] State and Local Jurisdiction [Member] Foreign [Member] Foreign Tax Authority [Member] Federal [Member] Domestic Tax Authority [Member] Tax Period [Axis] Tax Period [Axis] Tax Period [Domain] Tax Period [Domain] Earliest Tax Year [Member] Earliest Tax Year [Member] Latest Tax Year [Member] Latest Tax Year [Member] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Canada [Member] Canada Revenue Agency [Member] Valuation allowance, methodologies and assumptions Valuation Allowance, Methodologies and Assumptions Net operating loss carryforwards, deferred tax assets Net operating loss carryforwards, expiration date Operating Loss Carryforwards, Expiration Date U.S. corporate tax rate, percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Change in enacted tax rate, non-cash tax benefit (in dollars) Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Provision for U.S. income taxes not recognized, unremitted foreign earnings Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries Unrecognized tax benefits, accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized tax benefits, interest and penalties, income tax expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized tax benefits Unrecognized Tax Benefits that Would Impact Effective Tax Rate Workforce Subject to Collective Bargaining Arrangements [Member] Workforce Subject to Collective Bargaining Arrangements [Member] Unionized Employees [Member] Unionized Employees Concentration Risk [Member] Multiemployer Plans, Other Multiemployer [Member] Multiemployer Plans, Postretirement Benefit [Member] Low [Member] High [Member] Covered Employees and Contributions, Multiemployer Plans [Line Items] Multiemployer plans, covered employees (in number of employees) EntityNumberOfEmployeesDuringPeriod Number of employees employed by the entity over a period of time. Multiemployer plans, contributions (in dollars) Multiemployer Plan, Contributions by Employer Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Goodwill impairment Non-cash interest expense, net Amortization of Debt Issuance Costs and Discounts Non-cash stock-based compensation expense Share-based Compensation Provision for (benefit from) deferred income taxes Deferred Income Tax Expense (Benefit) Equity in earnings of unconsolidated affiliates (Gains) losses on sales of assets, net, including fixed assets held-for-sale Gain (Loss) on Sale of Assets and Asset Impairment Charges Other non-cash items, net Other Noncash Income (Expense) Changes in assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Other assets, current and long-term portion Increase (Decrease) in Other Operating Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Billings in excess of costs and earnings Increase (Decrease) in Billing in Excess of Cost of Earnings Other liabilities, current and long-term portion Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Cash flows from investing activities: Cash flows from financing activities: Repayments of other borrowings, net Repayments of Other Long-term Debt Payments of capital lease obligations Repayments of Long-term Capital Lease Obligations Proceeds from (payments for) stock-based awards, net Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Income tax (refunds) payments, net Income Taxes Paid, Net Supplemental disclosure of non-cash information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Additions to acquisition-related contingent consideration Equipment acquired under capital lease and financing arrangements Capital Lease Obligations Incurred Accrued capital expenditures Capital Expenditures Incurred but Not yet Paid Stock options exercised, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Stock options exercised, proceeds, net of shares withheld Proceeds from Stock Options Exercised Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Earn-Out Liabilities [Member] Earn-out Arrangements [Member] Future amounts payable for acquisitions of businesses and other interests, contingent upon the future earnings performance of the acquired businesses and other interests. Other Current Liabilities [Member] Other Current Liabilities [Member] Acquisition-related contingent consideration liabilities, estimated fair value Obligations, Fair Value Disclosure Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, low Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high Acquisition-related contingent consideration liabilities, range of potential earn-out liabilities, maximum unlimited Acquisition-related contingent consideration liabilities, additions from new business combinations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Acquisition-related contingent consideration liabilities, net increase (decrease), measurement period adjustments Acquisition-related contingent consideration liabilities, fair value adjustments, net increase (decrease), loss (gain) recorded in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Acquisition-related contingent consideration liabilities, payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Amortization Expense Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] Intangible assets, expected future amortization expense, 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Intangible assets, expected future amortization expense, 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two Intangible assets, expected future amortization expense, 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three Intangible assets, expected future amortization expense, 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four Intangible assets, expected future amortization expense, 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Intangible assets, expected future amortization expense, thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Intangible assets, expected future amortization expense, total EBITDA Reconciliation: Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Interest expense, net Interest Revenue (Expense), Net EBITDA EBITDA Earnings before interest, taxes, depreciation and amortization ("EBITDA"), a non-U.S. GAAP financial measure. Quarterly Information (Unaudited) Quarterly Financial Information [Text Block] EBITDA: Segment Reporting Information, Income (Loss) before Income Taxes [Abstract] Income Statement [Abstract] General and administrative expenses General and Administrative Expense Other income, net Nonoperating Income (Expense) Provision for income taxes Income Tax Expense (Benefit) Net income Net (loss) income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to MasTec, Inc. Earnings per share (Note 2): Earnings Per Share, Basic and Diluted [Abstract] Basic earnings per share (in dollars per share) Basic weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Diluted earnings per share (in dollars per share) Diluted weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Schedule of Earnings Per Share [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Treasury Stock, Common [Member] Treasury Stock, Common [Member] Earnings Per Share [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Computation of earnings per share, methodology Earnings Per Share Reconciliation Disclosure Treasury stock acquired (in shares) Treasury Stock, Shares, Acquired Effect of share repurchases, decrease in weighted average shares outstanding (in shares) Effect Of Repurchases On Weighted Average Shares Outstanding The decrease in the Company's weighted average number of shares outstanding, as compared with the respective prior year period(s), as a result of current period(s) share repurchases. Construction Services [Member] Construction Contracts [Member] 2017 Oil And Gas Acquisition [Member] Oil And Gas 2017 Acquisition [Member] Oil and Gas acquisition completed in 2017. Number of entities Number Of Entities Number of entities. Accounts receivable, net of BIEC, related parties Payments of acquisition-related contingent consideration Business combinations, liabilities assumed, notes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities Notes payable, repayments Repayments of Notes Payable Financing or amounts advanced, related party Payments for Advance to Affiliate Advances outstanding from related party Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] CCI [Member] Cross Country Infrastructure [Member] Cross Country Infrastructure Services Inc. ("CCI") (business name). “CCI” was previously Cross Country Pipeline Supply, Inc. (“CCP”). Equity investments, adjusted cost basis, amount Equity Securities without Readily Determinable Fair Value, Amount Equity investments, carrying value Equity investments, impairments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Multiemployer Plan Name [Axis] Multiemployer Plan Name [Axis] Multiemployer Plan Name [Domain] Multiemployer Plan Name [Domain] Central States [Member] Central States Southeast And Southwest Areas Pension Fund [Member] Central States Southeast And Southwest Areas Pension Fund Multiemployer plan, withdrawal liability, amount Multiemployer Plans, Withdrawal Obligation Multiemployer plan, withdrawal liability, payments Loss Contingency Accrual, Payments Multiemployer plan, withdrawal liability, expense Loss Contingency Accrual, Provision Schedule of Earnings Per Share Information Schedule of Weighted Average Number of Shares [Table Text Block] Rollforward of Goodwill by Reportable Segment Schedule of Goodwill [Table Text Block] Rollforward of Other Intangible Assets Intangible Assets Disclosure [Text Block] Schedule of Expected Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Consideration Paid and Net Assets Acquired, Business Combinations Schedule of Business Acquisitions, by Acquisition [Table Text Block] Lease Obligations Leases of Lessee Disclosure [Text Block] Accounts Receivable [Member] Trade Accounts Receivable [Member] Schedule of Accounts Receivable, Net of Allowance, and Contract Assets [Line Items] Schedule of Accounts Receivable, Net of Allowance, and Contract Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Activity, Allowance for Doubtful Accounts Schedule of Credit Losses for Financing Receivables, Current [Table Text Block] Revenue Recognition [Abstract] Revenue Recognition [Abstract] Revenue [Table] Revenue from External Customers by Products and Services [Table] ASU 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Concentration Risk from Type of Arrangement [Member] Product Concentration Risk [Member] Type of Agreement [Axis] Type of Agreement [Domain] Master Service and Other Service Agreements [Member] Master Service And Other Service Agreements [Member] Master service and other service agreements. Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Point in Time [Member] Transferred at Point in Time [Member] Revenue [Line Items] Revenue from External Customer [Line Items] Retained earnings, cumulative effect recognized on intial application of the new guidance (in dollars) Retained Earnings (Accumulated Deficit) Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage Changes In Contract Estimates, Cost-To-Cost Measure Of Progress, Financial Effect, Percentage Disclosure of the percentage effect on project profit (defined as project revenue less project costs of revenue, including depreciation) during the reporting period of changes in contract estimates for projects that were in process as of the end of the prior year and are accounted for under the cost-to-cost method. Revenue recognition, performance obligations satisfied in previous periods, revenue recognized (in dollars) Contract with Customer, Performance Obligation Satisfied in Previous Period Revenue recognition, performance obligations, completion period (in years) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Contract with customer, unapproved change orders and/or claims, amount (in dollars) Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next Twelve Months Change order or claim approval process, term within which expected to be completed (in years) Unapproved Change Orders And/Or Claims, Expected Term For Approval Expected length of time within which an unapproved change order or claim is approved by the customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States [Member] UNITED STATES Foreign Operations [Member] Non-US [Member] Geographic Concentration Risk [Member] Geographic Concentration Risk [Member] Property and equipment, net Property, Plant and Equipment, Net Intangible assets and goodwill, net Intangible Assets, Net (Including Goodwill) Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Backlog [Member] Order or Production Backlog [Member] Expected Term [Member] Measurement Input, Expected Term [Member] Business combinations, number of acquisitions Number of Businesses Acquired Business combinations, acquired finite-lived intangible assets, weighted average lives (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Business combinations, goodwill recognized, description Business Combination, Goodwill Recognized, Description Business combinations, goodwill, expected tax deductible amount (in dollars) Business Acquisition, Goodwill, Expected Tax Deductible Amount Business combinations, contingent consideration, basis for amount Business Combination, Contingent Consideration Arrangements, Basis for Amount Business combinations, contingent consideration, earn-out period (in years) Business Combination, Contingent Consideration, Liability, Measurement Input Business combinations, contingent consideration liabilities, range of potential undiscounted earn-out liabilities, low (in dollars) Business Combinations [Abstract] Business combinations, unaudited supplemental pro forma revenue Business Acquisition, Pro Forma Revenue Business combinations, unaudited supplemental pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Business combinations, unaudited pro forma information, description Business Acquisition, Pro Forma Information, Description Business combinations, consolidated acquisition-related revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business combinations, consolidated acquisition-related net income Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Net income attributable to MasTec: Net Income (Loss) Attributable to Parent, Diluted [Abstract] Net income - basic (in dollars) Net income - diluted (in dollars) Net Income (Loss) Attributable to Parent, Diluted Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average shares outstanding - basic Dilutive common stock equivalents (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares outstanding - diluted Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 2016 Share Repurchase Program [Member] 2016 Share Repurchase Program [Member] Share repurchase plan authorized by the board of directors in 2016. March 2018 Share Repurchase Program [Member] March 2018 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in March 2018. September 2018 Share Repurchase Program [Member] September 2018 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in September 2018. December 2018 Share Repurchase Program [Member] December 2018 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in December 2018. Equity, Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Treasury stock acquired, value Treasury Stock, Value, Acquired, Cost Method Payments for repurchase of common stock Share repurchase program, authorized amount, value Stock Repurchase Program, Authorized Amount Share repurchase program, amount available for future share repurchases, value Stock Repurchase Program, Remaining Authorized Repurchase Amount Performance Guarantees [Member] Proportionately consolidated non-controlled joint venture, ownership percentage Proportionately Consolidated Joint Venture Ownership Percentage The percentage interest in a proportionately consolidated joint venture. Guarantees issued, related party Long-term Debt and Capital Lease Obligations, Including Current Maturities [Abstract] Long-term Debt and Capital Lease Obligations, Including Current Maturities [Abstract] Capital Lease Obligations [Member] Capital Lease Obligations [Member] Other Debt Obligations [Member] Notes Payable, Other Payables [Member] Line of credit facility, maturity date Line of Credit Facility, Expiration Date Long-term debt obligations Debt instrument, weighted average interest rate (percentage) Debt, Weighted Average Interest Rate Capital lease obligations, expiration date, range, end Lease Expiration Date Capital lease obligations Less unamortized deferred financing costs Debt Issuance Costs, Net Total debt, net of deferred financing costs Long-term Debt and Capital Lease Obligations, Including Current Maturities Current portion of long-term debt Long-term Debt and Capital Lease Obligations, Current Long-term debt Long-term Debt and Capital Lease Obligations Quarterly Financial Information [Table] Interim Period, Costs Not Allocable [Table] Quarterly Financial Information [Line Items] Interim Period, Costs Not Allocable [Line Items] Project gains Project losses Stock based compensation, net excess tax benefits (in dollars) Change in tax rate, non-cash tax (expense) benefit Stock-based compensation awards, unearned compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Stock-based compensation awards, unearned compensation, weighted average expected recognition period (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Stock-based compensation, vested awards, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Condensed Consolidating Balance Sheets [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Assets Assets [Abstract] Total current assets Assets, Current Goodwill and other intangible assets, net Investments in and advances to consolidated affiliates, net Due from Affiliate, Noncurrent Other long-term assets Other Assets, Noncurrent Total assets Liabilities and equity Liabilities and Equity [Abstract] Total current liabilities Liabilities, Current Other long-term liabilities Liabilities, Other than Long-term Debt, Noncurrent Total liabilities Liabilities Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Chief Executive Officer [Member] Chief Executive Officer [Member] Life insurance, face amount Life Insurance, Corporate or Bank Owned, Amount Payments for life insurance policies Payment to Acquire Life Insurance Policy, Investing Activities Life insurance assets, carrying amount Cash Surrender Value of Life Insurance Restricted Stock Units [Member] Restricted Stock Units (RSUs) [Member] Restricted Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested restricted shares, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested restricted shares, ending balance (in shares) Per Share Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Non-vested restricted shares, per share weighted average grant date fair value, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Canceled/forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share) Investment [Member] Investments [Member] Other investment, changes in expected recovery estimates, (expense) income Gain (Loss) on Investments Other current assets Other Assets, Current Schedule of Components of Income before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Provision for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Effective Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Rollforward of Uncertain Tax Positions Summary of Income Tax Contingencies [Table Text Block] Other Commitments [Table] Other Commitments [Table] Proportionately Consolidated Non-Controlled Joint Venture [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Joint Ventures That Provide Electrical Transmission Infrastructure Services [Member] Joint Ventures That Provide Electrical Transmission Infrastructure Services [Member] Joint venture(s) that provide(s) electrical transmission infrastructure services. Advances on Project Work [Member] Advances On Project Work [Member] Advances on project work. Other Commitments [Line Items] Other Commitments [Line Items] Other current liabilities Other Liabilities, Current Business, Basis of Presentation and Significant Accounting Policies [Table] Business, Basis Of Presentation And Significant Accounting Policies [Table] Schedule reflecting financial concepts. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Workers' Compensation Policy [Member] General Liability Policy [Member] General Liability [Member] Property Insurance Policy [Member] Property Insurance Product Line [Member] Property and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Automobile Liability [Member] Automobiles [Member] Business, Basis Of Presentation And Significant Accounting Policies [Line Items] Business, Basis Of Presentation And Significant Accounting Policies [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Valuation allowances for inventory Inventory Valuation Reserves Cash Financing costs incurred Payments of Debt Issuance Costs Amortization of deferred financing costs Amortization of Debt Issuance Costs Deferred financing costs, net of accumulated amortization Per claim deductible, insurance policies Malpractice Insurance, Deductible Loss contingency, maximum loss per employee Loss Contingency, Range Of Possible Loss, Maximum, Per Employee The maximum amount of possible loss from the contingency per employee. Schedule of Future Lease Commitments Schedule Of Future Minimum Rental Payments For Operating Leases And Lease Payments For Capital Leases [Table Text Block] Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years under capital leases and operating leases, including escalation clauses in effect as of the balance sheet date, having initial or remaining non-cancelable lease terms in excess of one year. Income Taxes Income Tax Disclosure [Text Block] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Rollforward of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Other Retirement Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Pipeline Industry Pension Fund [Member] Pipeline Industry Pension Fund [Member] Pipeline Industry Pension Fund Central Pension Fund of IUOE & Participating Employers [Member] Central Pension Fund Of IUOE And Participating Employers [Member] Central Pension Fund of the International Union of Operating Engineers and Participating Employers Teamsters National Pipe Line Pension Plan [Member] Teamsters National Pipe Line Pension Plan [Member] Teamsters National Pipe Line Pension Plan International Union of Operating Engineers Local 132 Pension Fund [Member] International Union Of Operating Engineers Local One Hundred And Thirty Two Pension Fund [Member] International Union of Operating Engineers Local 132 Pension Fund West Virginia Laborers' Pension Trust Fund [Member] West Virginia Laborers Pension Trust Fund [Member] West Virginia Laborers Pension Trust Fund Laborers' National Pension Fund [Member] Laborers National Pension Fund [Member] Laborers National Pension Fund Laborers' Pension Fund of Roanoke, Virginia [Member] Laborers' Pension Fund Of Roanoke, Virginia [Member] Laborers' Pension Fund of Roanoke, Virginia IBEW Local 1249 Pension Plan [Member] I.B.E.W. Local 1249 Pension Plan [Member] I.B.E.W. Local 1249 Pension Plan Ohio Operating Engineers Pension Plan [Member] Ohio Operating Engineers Pension Plan [Member] Ohio Operating Engineers Pension Plan Laborers' Local Union No. 158 Pension Plan [Member] Laborers' Local Union No. One Hundred And Fifty Eight Pension Fund [Member] Laborers' Local Union No. 158 Pension Fund Employer- Teamsters Local Nos. 175 & 505 Pension Trust Fund [Member] Employer- Teamsters Local One Hundred And Seventy Five And Five Hundred And Five Pension Trust Fund [Member] Employer- Teamsters Local 175 & 505 Pension Trust Fund Michigan Laborers' Pension Plan [Member] Michigan Laborers Pension Fund [Member] Michigan Laborers' Pension Plan National Electrical Benefit Fund [Member] National Electrical Benefit Fund [Member] National Electrical Benefit Fund Laborers' District Council of Western Pennsylvania Pension Fund [Member] Laborers' District Council of W PA Pension Fund [Member] Laborers' District Council of Western Pennsylvania Pension Fund. Operating Engineers' Local 324 Pension Fund [Member] Operating Engineers Local Three Hundred And Twenty Four Pension Fund [Member] Operating Engineers' Local 324 Pension Fund Other Funds [Member] Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member] Retirement Plan Location [Axis] Retirement Plan Sponsor Location [Axis] Retirement Plan Location [Domain] Retirement Plan Sponsor Location [Domain] Foreign Plan [Member] Foreign Plan [Member] Canada [Member] CANADA Multiemployer plans, employer identification number Entity Tax Identification Number Multiemployer plans, plan number Multiemployer Plan Number Multiemployer plans, collective bargaining arrangement, expiration date Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Multiemployer plans, pension protection act zone status Multiemployer Plans, Certified Zone Status [Fixed List] Multiemployer plans, pension protection act zone status, date Multiemployer Plans, Certified Zone Status, Date Multiemployer plans, Company contributions greater than 5% of total plan contributions Multiemployer Plans, Period Contributions, Significance of Contributions [true false] Multiemployer plans, pension protection act zone status, extended amortization provisions Multiemployer Plans, Certified Zone Status, Extended Amortization Provisions [true false] Multiemployer plans, funding improvement plan and rehabilitation plan status Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan [Fixed List] Multiemployer plans, surcharge status Multiemployer Plans, Surcharge [Fixed List] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Revenue recognition, remaining performance obligations, contract price allocated (in dollars) Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue recognition, remaining performance obligations, completion period (in months) Statement of Financial Position [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net (Note 5) Accounts Receivable, Net, Current Inventories, net Inventory, Net Prepaid expenses Prepaid Expense, Current Other current assets Total current assets Goodwill, net Other intangible assets, net Current liabilities: Liabilities, Current [Abstract] Current portion of long-term debt Accounts payable Accounts Payable, Current Accrued salaries and wages Employee-related Liabilities, Current Other accrued expenses Accrued Liabilities, Current Total current liabilities Long-term debt Deferred income taxes Other long-term liabilities Other Liabilities, Noncurrent Commitments and contingencies (Note 14) Commitments and Contingencies Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $1.00 par value: authorized shares - 5,000,000; issued and outstanding shares – none Preferred Stock, Value, Issued Common stock, $0.10 par value: authorized shares - 145,000,000; issued shares - 91,327,009 and 90,935,584 (including 1,251,533 and 1,421,041 of unvested stock awards) as of December 31, 2018 and December 31, 2017, respectively Common Stock, Value, Issued Capital surplus Additional Paid in Capital, Common Stock Retained earnings Accumulated other comprehensive loss Treasury stock, at cost: 15,329,817 shares and 8,132,811 shares as of December 31, 2018 and 2017, respectively Treasury Stock, Common, Value Total MasTec, Inc. shareholders’ equity Stockholders' Equity Attributable to Parent Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Defined Contribution Plan [Abstract] 401(k) Plan [Table] Defined Contribution Plan [Table] 401(k) Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Stock-based compensation plan, description Defined Contribution Plan, Description 401(k) plan, maximum pre-tax annual contribution per employee, percentage of annual compensation Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 401(k) plan, employer matching contribution, percentage of matching contribution for first 3% of employee's salary Defined Contribution Plan Employer Matching Contribution Percent Of Match Up To Specific Percentage Percentage that the employer matches, up to a specified percentage, of the employee's percentage contribution to a defined contribution plan. 401(k) plan, employer 100% matching contribution, percentage of employee's salary Defined Contribution Plan Employer Full Matching Contribution Percent Percentage of employees' gross pay for which the employer contributes a full matching contribution to a defined contribution plan. 401(k) plan, employer matching contribution, percentage of matching contribution for 3% to 5% of employee's salary Defined Contribution Plan Employer Matching Contribution Percent Of Match Within Specified Percentage Range Percentage that the employer matches, within a specified range of percentages, of the employee's percentage contribution to a defined contribution plan. 401(k) plan, employer 50% matching contribution, additional percentage of employee's salary Defined Contribution Plan Employer Partial Matching Contribution Percent Additional percentage of employee's gross pay for which the employer contributes a partial matching contribution to a defined contribution plan. 401(k) plan, employer matching contribution, percentage of employee's salary Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 401(k) plan, discretionary employer matching contribution, percentage of matching contribution payable in shares Employer Matching Contribution Percent Of Matching Contribution Payable In Shares Employer matching contribution to 401(k), percentage of matching contribution payable in shares. 401(k) plan, discretionary employer matching contribution, percentage of matching contribution payable in cash Employer Matching Contribution, Percent Of Matching Contribution Payable In Cash Employer matching contribution to 401(k), percentage of matching contribution payable in cash. 401(k) plan, employer matching contribution (in dollars) Defined Contribution Plan, Cost Provision for Income Taxes [Table] Provision For Income Taxes [Table] A summary of the components of an entity's provision for income taxes, including the current and deferred portions. Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing Operations [Member] Continuing Operations [Member] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) State and local Current State and Local Tax Expense (Benefit) Total current income tax expense Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) State and local Deferred State and Local Income Tax Expense (Benefit) Total deferred income tax expense Provision for income taxes Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Treasury Stock [Member] Capital Surplus [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] AOCI Attributable to Parent [Member] Total MasTec, Inc. Shareholders’ Equity [Member] Parent [Member] Non-Controlling Interests [Member] Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Consolidated Statements of Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, common shares outstanding (in shares) Common Stock, Shares, Issued Beginning balance Beginning balance, treasury shares (in shares) Treasury Stock, Common, Shares Cumulative effect of adoption, revenue recognition (Topic 606) Cumulative Effect of New Accounting Principle in Period of Adoption Net income (loss) Other comprehensive income (loss) Non-cash stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Income tax effect from stock-based compensation Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Issuance of restricted shares (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of restricted shares Stock Issued During Period, Value, Restricted Stock Award, Gross Other stock issuances, net of shares withheld for taxes (in shares) Stock Issued During Period, Shares, Other Other stock issuances, net of shares withheld for taxes Stock Issued During Period, Value, Other Shares withheld for taxes, net of other share activity (in shares) Shares Paid for Tax Withholding for Share Based Compensation Shares withheld for taxes, net of other share activity Adjustments Related to Tax Withholding for Share-based Compensation Acquisition of treasury stock, at cost (in shares) Acquisition of treasury stock, at cost Other activity, net Noncontrolling Interests, Other This element represents other increases (decreases) in noncontrolling interests which are not separately disclosed or provided for elsewhere in the taxonomy. Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Purchase of non-controlling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ending balance, common shares outstanding (in shares) Ending balance Ending balance, treasury shares (in shares) Amortization expense, intangible assets Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Condensed Income Statement [Table Text Block] Condensed Consolidating Balance Sheets Condensed Balance Sheet [Table Text Block] Condensed Consolidating Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Segments and Related Information Segment Reporting Disclosure [Text Block] Equipment [Member] Machinery and Equipment [Member] Payments, net of rebates, related party Related Party Transaction, Amounts of Transaction 4.875% Senior Notes, gross carrying amount Senior Notes 4.875% Senior Notes, estimated fair value Notes Payable, Fair Value Disclosure Deferred Compensation Arrangements [Abstract] Deferred Compensation Arrangements [Abstract] Deferred compensation plans, description Deferred Compensation Arrangements, Overall, Description Deferred compensation plans, assets Deferred Compensation Plan Assets Deferred compensation plans, liabilities Deferred Compensation Liability, Classified, Noncurrent Uncertain Tax Positions [Rollforward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Beginning balance Unrecognized Tax Benefits Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Ending balance Earnings Per Share Earnings Per Share [Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Restricted Stock Awards [Member] Restricted Stock [Member] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Unvested stock awards (in shares) Treasury stock, shares Schedule of Summarized Financial Information of Equity Method Investments Equity Method Investments [Table Text Block] Schedule of Property and Equipment [Table] Property, Plant and Equipment [Table] Land [Member] Land [Member] Building and Leasehold Improvements [Member] Building and Building Improvements [Member] Machinery and Equipment [Member] Office Furniture and Equipment [Member] Furniture and Fixtures [Member] Construction in Progress [Member] Construction in Progress [Member] Property and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Estimated useful lives (in years) Property, Plant and Equipment, Useful Life Accounts Receivable, Net of Allowance, and Contract Assets and Liabilities Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Translation of Foreign Currencies Foreign Currency Transactions and Translations Policy [Policy Text Block] Management Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Allowance for Doubtful Accounts Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Equity Method Investments Equity Method Investments [Policy Text Block] Unicorporated Entities, Proportional Consolidation Interest in Unincorporated Joint Ventures or Partnerships, Policy [Policy Text Block] Other Equity Investments With Readily Determinable Fair Values Marketable Securities, Policy [Policy Text Block] Other Equity Investments Without Readily Determinable Fair Values Equity Securities without Readily Determinable Fair Value [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Finite-Lived Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Goodwill and Indefinite-Lived Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Deferred Financing Costs Deferred Charges, Policy [Policy Text Block] Self-Insurance Self Insurance Reserve [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Collective Bargaining Agreements and Multiemployer Plans Collective Bargaining Agreements and Multiemployer Plans [Policy Text Block] Disclosure of accounting policy for collective bargaining agreements and multiemployer plans. Restructuring Activities Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block] Litigation and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Income Tax Uncertainties Income Tax Uncertainties, Policy [Policy Text Block] Schedule of Restructuring Activities [Table] Schedule of Restructuring and Related Costs [Table] General and Administrative Expense [Member] General and Administrative Expense [Member] Other Expense [Member] Nonoperating Income (Expense) [Member] Restructuring Activities [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring liabilities, current Restructuring Reserve, Current Capitalized internal-use software, gross Capitalized Computer Software, Gross Capitalized internal-use software, net Capitalized Computer Software, Net U.S. statutory federal rate applied to pretax income State and local income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Goodwill and intangible assets EffectiveIncomeTaxRateReconciliationGoodwillAndIntangibleAssets Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible (deductible) amounts for goodwill and intangible assets. Change in tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Domestic production activities deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Valuation allowance for deferred tax assets Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Condensed Income Statement [Table] Condensed Income Statement [Table] Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Line Items] Condensed Income Statements, Captions [Line Items] Interest expense (income), net Equity in (earnings) losses of unconsolidated affiliates Other (income) expense, net (Provision for) benefit from income taxes Net income (loss) before equity in income (loss) from subsidiaries Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Equity in income (losses) from subsidiaries, net of tax Income (Loss) from Subsidiaries, Net of Tax Net income (loss) attributable to non-controlling interests Comprehensive income (loss) Debt Long-term Debt [Text Block] Accounts Receivable, Net of Allowance, and Contract Assets [Abstract] Accounts Receivable, Net, Current [Abstract] Contract billings Contract Receivable, Due in Next Twelve Months Less allowance for doubtful accounts Accounts receivables, net of allowance Contract Receivables, Net of Allowance Amount billed to customers under contracts or programs to be collected in the next twelve months, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Excludes amounts due that have been withheld because of retainage provisions in a contract. Retainage Contract Receivable Retainage, Next Twelve Months Cost and earnings in excess of billings Costs in Excess of Billings, Current Retainage and costs and earnings in excess of billings (together, contract assets) Contract with Customer, Asset, Net, Current Accounts receivable, net Acquisition of Non-Controlling Interest [Member] Acquisition Of Noncontrolling Interest [Member] Acquisition of the remaining noncontrolling interest in a subsidiary. Distributions to non-controlling interests Number of subsidiaries, non-controlling interests Number Of Subsidiaries Number of consolidated subsidiaries reported by the Company. Payments to acquire remaining non-controlling interests Payments to Acquire Additional Interest in Subsidiaries Contingent consideration, earn-out liability