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Uncertain Tax Positions [Rollforward] Unrecognized Tax Benefits [Roll Forward] Executive Officers Executive Officer [Member] Contractual Maturities of Debt and Finance Lease Obligations Maturities of Long-Term Debt [Abstract] Repayments of 6.625% senior notes Repayments of Unsecured Debt Infrastructure Energy Alternatives, Inc. And IEA Constructors, LLC Infrastructure Energy Alternatives, Inc. And IEA Constructors, LLC [Member] Infrastructure Energy Alternatives, Inc. And IEA Constructors, LLC Laborers' National Pension Fund Laborers National Pension Fund [Member] Laborers National Pension Fund PEO PEO [Member] Debt Instrument, Redemption, Period Four Debt Instrument, Redemption, Period Four [Member] Earnings (loss) per share (Note 2): Earnings Per Unit [Abstract] Contingent Liabilities Contingent Liabilities [Member] Contingent Liabilities Name Trading Arrangement, Individual Name Property and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Entity Public Float (in dollars) Entity Public Float Stock basis adjustment Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Percent Treasury stock, at cost: 19,719,796 and 19,813,055 shares as of December 31, 2024 and 2023, respectively Treasury Stock, Common, Value Equity in earnings of unconsolidated affiliates, net Equity method investments, equity in earnings (losses) Income (Loss) from Equity Method Investments Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Line of credit facility, unused facility fee (percentage) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Payments for advance to affiliate Payments for Advance to Affiliate 2022 Acquisitions 2022 Acquisitions [Member] 2022 Acquisitions Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Noncontrolling interest, percentage of voting interests acquired Noncontrolling Interest, Percentage of Voting Interests Acquired Noncontrolling Interest, Percentage of Voting Interests Acquired 2011 Incentive Plan 2011 Incentive Plan [Member] 2011 Incentive Plan Multiemployer plans, withdrawal obligation Multiemployer Plans, Withdrawal Obligation SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Infrastructure Energy Alternatives, Inc. Warrants Infrastructure Energy Alternatives, Inc. Warrants [Member] Infrastructure Energy Alternatives, Inc. Warrants Local Phone Number Local Phone Number Other intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Valuation allowance Deferred Tax Assets, Valuation Allowance Schedule of Multiemployer Pension Plans Multiemployer Plan [Table Text Block] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Foreign Line of Credit Other Credit Facilities Foreign Line of Credit [Member] Payments to acquire ownership interest in minority interest Payments to Acquire Interest in Subsidiaries and Affiliates Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Additions from new business combinations Intangible Assets Acquired, Gross (Excluding Goodwill) Amount of increase in intangible assets, excluding goodwill, from an acquisition. Changes in assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] PEO Total Compensation Amount PEO Total Compensation Amount Property, Plant And Equipment, Net Property, Plant And Equipment, Net [Member] Property, Plant And Equipment, Net Stock-based compensation, purchase price of common stock, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Senior notes, gross carrying amount Senior Notes CCI Cross Country Infrastructure [Member] Cross Country Infrastructure Services, Inc. ("CCI") (business name). Business acquisition, number of shares issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Property and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Waha JVs Waha JVs [Member] Trans-Pecos Pipeline, LLC ("TPP") (business name) and Comanche Trail Pipeline, LLC ("CTP") (business name), together referred to as the "Waha JVs". 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These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. 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Proceeds from credit facilities and term loans Proceeds from Long-Term Lines of Credit Business acquisition, equity interest issued or issuable, value assigned Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Schedule Of Other Intangible Assets [Table] ScheduleOfIntangibleAssets [Table] Schedule of intangible assets, excluding goodwill. Additions from new business combinations Goodwill, Acquired During Period Statistical Measurement [Domain] Statistical Measurement [Domain] Contract assets Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current IEA 2022 Acquisitions, Infrastructure Energy Alternatives, Inc. [Member] 2022 Acquisitions, Infrastructure Energy Alternatives, Inc. 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(“AVCT”) (business name) -- formerly known as Pensare Acquisition Corp. ("Pensare"). 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Thereafter Finance Lease, Liability, to be Paid, after Year Five Punitive damages Loss Contingency, Damages Awarded, Value Equity Components [Axis] Equity Components [Axis] Total minimum lease payments Finance Lease, Liability, to be Paid Earn-out liability term Business Combination, Contingent Consideration Arrangements, Earn-out Liability Term Business Combination, Contingent Consideration Arrangements, Earn-out Liability Term Other current assets Other Assets, Current Trade Names Trade Names [Member] Net income (loss) Business Acquisition, Pro Forma Net Income (Loss) Shares withheld for taxes, net of other stock issuances (in shares) Stock Issued During Period, Shares, Other Plan Number Multiemployer Plan, Pension, Significant, Plan Number Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Receivable [Domain] Receivable [Domain] Shares transferred Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Central Laborers' Pension Fund Central Laborers Pension Fund [Member] Central Laborers Pension Fund. 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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. Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Warrant Warrant [Member] Security Exchange Name Security Exchange Name Line of credit facility, interest rate description Debt Instrument, Basis Spread on Variable Rate Related Party Transaction [Domain] Related Party Transaction [Domain] Restricted Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Automobile Liability Automobile Liability [Member] Automobile Liability State and local Current State and Local Tax Expense (Benefit) Surcharge Multiemployer Plan, Pension, Significant, Surcharge [Fixed List] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Goodwill and Intangible Assets [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Percentage of earn out payment paid Payment For Contingent Consideration Liability, Percentage, Financing Activities Percentage of Payment For Contingent Consideration Liability Financing Activities Gain recognized in other income related to acquisitions Multiemployer Plans, Gain (Loss) From Acquisitions Multiemployer Plans, Gain (Loss) From Acquisitions Common stock, shares issued (in shares) Beginning balance, common shares outstanding (in shares) Ending balance, common shares outstanding (in shares) Common Stock, Shares, Issued Multiemployer Plan Name [Domain] Retirement Plan Name [Domain] Entity [Domain] Entity [Domain] Line of credit facility, maximum borrowing capacity Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Concentration risk, percentage of total Concentration Risk, Percentage Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] General Liability Policy General Liability [Member] Receivables, related party Accounts Receivable, after Allowance for Credit Loss Heavy & General Laborers' Local Unions 472 and 172 of New Jersey Pension Fund Heavy & General Laborers' Local Unions 472 and 172 of New Jersey Pension Fund [Member] Heavy & General Laborers' Local Unions 472 and 172 of New Jersey Pension Fund Common stock, shares authorized (in shares) Common Stock, Shares Authorized Cash paid for acquisitions, net of cash acquired Cash, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Maximum consolidated leverage ratio Ratio of Indebtedness to Net Capital Other Equity Method Investments Other Equity Method Investments [Member] Other Equity Method Investments Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Entity Voluntary Filers Entity Voluntary Filers Related Party Related Party [Member] Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Total deferred income tax expense Deferred Income Tax Expense (Benefit) Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Payments of acquisition-related contingent consideration Payments of acquisition-related contingent consideration Payment for Contingent Consideration Liability, Financing Activities Income Taxes, Income Tax Uncertainties Income Tax Uncertainties, Policy [Policy Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Depreciation and Amortization: Depreciation, Depletion and Amortization [Abstract] Amounts charged against the allowance Accounts Receivable, Allowance for Credit Loss, Writeoff FM Tech FM Tech [Member] FM Technology Holdings, LLC (business name), FM USA Holdings, LLC (business name) and All Communications Solutions Holdings, LLC (business name), together referred to as “FM Tech.” Accounts receivable, net of allowance Accounts receivable, net of allowance Accounts Receivable, after Allowance for Credit Loss, Current Number of management members, subcontracting arrangement Number Of Management Members Number of persons from management with an ownership interest in the related party entity. Other liabilities, current and long-term portion Increase (Decrease) in Other Operating Liabilities Deloitte & Touche LLP Deloitte & Touche LLP [Member] Deloitte & Touche LLP Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Thereafter Long-Term Debt, Maturity, after Year Five Contract billings Accounts Receivable, before Allowance for Credit Loss, Current 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. 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. Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] 6.625% Senior Notes Six Point Six Two Five Percent Senior Notes [Member] Six Point Six Two Five Percent Senior Notes Equity investments, carrying value Equity method investments, net investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Document Annual Report Document Annual Report 2027 Finance Lease, Liability, to be Paid, Year Three Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Deferred compensation plans, assets Deferred Compensation Plan Assets Total MasTec, Inc. Shareholders’ Equity Parent [Member] Other intangible assets, non-amortizing Indefinite-Lived Intangible Assets (Excluding Goodwill) Amortization expense Amortization of Intangible Assets Schedule II - Valuation and Qualifying Accounts [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Foreign Operations Non-US [Member] 4.500% Senior Notes Four Point Five Percent Senior Notes [Member] 4.50% Senior Notes Accounting Policies [Abstract] Accounting Policies [Abstract] Litigation and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Balance at Beginning of Period Balance at End of Period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Less amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount PEO Name PEO Name Award Type [Domain] Award Type [Domain] Award Type [Domain] Local Union No. 9 IBEW and Outside Contractors Pension Fund Local Union No. 9 IBEW and Outside Contractors Pension Fund [Member] Local Union No. 9 IBEW and Outside Contractors Pension Fund Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Useful life Finite-Lived Intangible Asset, Useful Life Power Delivery Segment, Reporting Unit One Power Delivery Segment, Reporting Unit One [Member] Power Delivery Segment, Reporting Unit One Employee Stock Ownership Plan (ESOP) Name [Axis] Employee Stock Ownership Plan (ESOP) Name [Axis] Number of reporting components Number Of Reporting Components Number Of Reporting Components Capital Surplus Additional Paid-in Capital [Member] Long-term portion of lease obligations, net of interest Finance Lease, Liability, Noncurrent Schedule of Accounts Receivable, Net of Allowance, and Contract Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Contract assets Increase (Decrease) in Contract with Customer, Asset Other Retirement Plans Retirement Benefits [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Segment and Related Information [Line Items] Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] Debt instrument, ownership percentage Debt Instrument, Ownership Percentage Debt Instrument, Ownership Percentage Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 2028 Finance Lease, Liability, to be Paid, Year Four Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Schedule of Earnings Per Share Information Schedule of Weighted Average Number of Shares [Table Text Block] Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Number of operating segments Number of Operating Segments Revenue [Table] Disaggregation of Revenue [Table] Investments and Strategic Arrangements,, Unincorporated Entities, Proportional Consolidation Oil and Gas and Mining, Proportionate Consolidation, Interest in Unincorporated Joint Venture or Partnership [Policy Text Block] Business combinations, contingent consideration, earn-out period (in years) Acquisition-related contingent consideration liabilities, measurement input, discount rate Business Combination, Contingent Consideration, Liability, Measurement Input Non-cash stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Number of fiscal quarters subsequent to quarter in which right was exercised Number Of Fiscal Quarters Subsequent To Quarter In Which Right Was Exercised Number of subsequent fiscal quarters that the Consolidated Leverage Ratio may be temporarily increased to up to a certain multiple, after the initial fiscal quarter in which such ratio was increased. Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Pension Protection Act Zone Status, Date Multiemployer Plan, Pension, Significant, Certified Zone Status, Date Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] All other 2022 Acquisitions, All Other [Member] 2022 Acquisitions, All Other Number of Years of Discounted Cash Flows 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. Acquisition-related contingent consideration liabilities, additions from new business combinations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Debt instrument, interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Finance lease and other obligations Finance Lease And Other Obligations The carrying amount as of the balance sheet date for the aggregate of finance lease and other obligations. Finance lease obligations represents the present value of lessee's discounted obligation for lease payments from finance leases. Other obligations represents the carrying amount of debt obligations classified as other. Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Leases Lessor, Leases [Policy Text Block] Net income (loss) -diluted Net Income (Loss) Available to Common Stockholders, Diluted Other expense (income), net Nonoperating Income (Expense) Liability Accounts Payable, after Allowance for Credit Loss Accounts Payable, after Allowance for Credit Loss Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Schedule II - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Forfeiture of restricted shares, net Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Auditor Firm ID Auditor Firm ID Effective income tax rate Effective Income Tax Rate Reconciliation, Percent AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Variable Rate [Domain] Variable Rate [Domain] Number of reportable segments Number of Reportable Segments Total liabilities and equity Liabilities and Equity Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Investments and Strategic Arrangements,, Other Equity Investments With Readily Determinable Fair Values Marketable Securities, Policy [Policy Text Block] 5.900% Senior Notes Five Point Nine Percent Senior Notes [Member] Five Point Nine Percent Senior Notes 2026 Finance Lease, Liability, to be Paid, Year Two Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Current portion of long-term debt, including finance leases Current portion of long-term debt Long-Term Debt and Lease Obligation, Current Schedule of Activity, Restricted Shares Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Schedule of Contractual Maturities of Debt and Finance Lease Obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Business, Basis of Presentation and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Operating leases, additions Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Underlying Security Market Price Change Underlying Security Market Price Change, Percent Measurement Input Type [Axis] Measurement Input Type [Axis] Individual: Individual [Axis] Buildings and leasehold improvements Building and Building Improvements [Member] Government Transactions Government transactions [Member] Activities related to government transactions. Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Inventories, net Inventory, Net Insurance Policies By Type [Axis] Product and Service [Axis] Product and Service [Axis] Property and Equipment [Line Items] Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] Measurement Input Type [Domain] Measurement Input Type [Domain] Canadian Joint Venture Canadian Joint Venture [Member] Proportionately consolidated non-controlled Canadian joint venture [Member] Total debt obligations Total debt obligations Long-term Debt and Finance Lease Obligations, Including Current Maturities, Gross Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt and finance lease obligations including current maturities. Reconciliation of Consolidated Income before Income Taxes to EBITDA Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] 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. Total consideration Business Combination, Consideration Transferred Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Minimum Low Minimum [Member] Estimated fair value of warrants Business Combination, Consideration Transferred, Warrants Business Combination, Consideration Transferred, Warrants Equipment Company Acquisition Two Equipment Company Acquisition Two [Member] Equipment Company Acquisition Two San Diego County Construction Laborers' Pension Trust Fund San Diego County Construction Laborers' Pension Trust Fund [Member] San Diego County Construction Laborers' Pension Trust Fund Senior notes, estimated fair value Notes Payable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Related Party Transactions [Abstract] Related Party Transactions [Abstract] Accounts receivable, credit loss expense (reversal) Accounts Receivable, Credit Loss Expense (Reversal) Segments [Axis] Segments [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Revenue Business Acquisition, Pro Forma Revenue Commitments And Contingencies Concentration Risk Commitments And Contingencies Concentration Risk [Member] Commitments And Contingencies Concentration Risk U.S. statutory federal rate applied to pretax income Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Long-term debt obligations Long-term debt obligations Long-Term Debt, Gross Exercise Price Award Exercise Price Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Succeeding Plan Years Multiemployer Plan Period Two [Member] Multiemployer Plan Period Two [Member] Arrangement Duration Trading Arrangement Duration C. Robert Campbell [Member] C. Robert Campbell Plan Scenario, Plan [Member] Lease Obligations Lessee, Finance Leases [Text Block] Equity Equity, Attributable to Parent [Abstract] Subsidiaries Subsidiaries [Member] Federal Domestic Tax Jurisdiction [Member] Goodwill Goodwill [Member] Former Owner Former Owner [Member] Former Owner Debt instrument, change of control, redemption price, percent Debt Instrument, Change of Control, Redemption Price, Percent The premium to redeem senior notes if a change of control occurs. Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Debt instrument, term Debt Instrument, Term Repurchase amount Debt Instrument, Repurchase Amount IEA Senior Notes Six Point Six Two Five Percent IEA Senior Notes [Member] Six Point Six Two Five Percent IEA Senior Notes Total lease obligations, net of interest Finance Lease, Liability 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Four All Individuals All Individuals [Member] Reporting Unit [Axis] Reporting Unit [Axis] EBITDA Segment EBITDA EBITDA Earnings before interest, taxes, depreciation and amortization ("EBITDA"), a non-U.S. GAAP financial measure. Variable Rate [Axis] Variable Rate [Axis] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Goodwill, gross Goodwill, Gross Power Delivery Power Delivery [Member] The engineering, construction and maintenance of electrical transmission lines and substations, primarily for the energy and utility industries. Other Multiemployer Other Postretirement Benefits Plan [Member] Gains on sales and impairments of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Other intangible assets, net Other intangible assets, net, beginning balance Other intangible assets, net, ending balance Intangible Assets, Net (Excluding Goodwill) Receivables [Abstract] Receivables [Abstract] Henkels & McCoy Group, Inc. 2021 Acquisitions, Henkels & McCoy Group, Inc. [Member] 2021 Acquisitions, Henkels & McCoy Group, Inc. Goodwill impairment testing, measurement input Goodwill Impairment Testing, Measurement Input Value of input used in goodwill impairment testing. Cash proceeds Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Stock-based compensation awards, unearned compensation Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Payments, related party Operating Costs and Expenses Consolidated leverage ratio, maximum Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum Other Other Operating Segment [Member] Amortization of intangible assets Cost, Amortization 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. Related Party [Domain] Related and Nonrelated Parties [Domain] Lease, term of contract Lessee, Lease, Term Of Contract Term of lessee's lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Goodwill impairment testing, reporting unit, percentage of estimated fair value in excess of carrying value (percentage) Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount IBEW Local 1249 Pension Plan IBEW Local 1249 Pension Plan [Member] IBEW Local 1249 Pension Plan Liability Class [Axis] Liability Class [Axis] Management Management [Member] Deferred income taxes Net deferred tax liabilities Deferred Income Tax Liabilities, Net Fees and expenses incurred in connection with debt Debt Related Commitment Fees and Debt Issuance Costs Gain on remeasurement of equity investee Deferred Tax Liabilities, Tax Deferred Income Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Other assets, current and long-term portion Increase (Decrease) in Other Operating Assets Restricted Shares 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 Awards and Restricted Stock Units are together referred to as "Restricted Shares". Amortizing intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Federal Deferred Federal Income Tax Expense (Benefit) Forfeiture of restricted shares, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Share Repurchase Program [Domain] Share Repurchase Program [Domain] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Treasury stock reissued Stock Issued During Period, Value, Treasury Stock Reissued Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Consolidated interest coverage ratio Consolidated 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. Measure: Measure [Axis] Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Asset Class [Domain] Asset Class [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Issuance of shares for acquisition (in shares) Stock Issued During Period, Shares, New Issues Capitalized internal-use software, gross Capitalized Computer Software, Gross Revenue, Significant Customer [Line Items] Revenue, Major Customer [Line Items] Permitted Acquisition Permitted Acquisition [Member] A permitted acquisition or series of permitted acquisitions as defined in the Credit Facility agreement. Entity Emerging Growth Company Entity Emerging Growth Company Non-Amortizing Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Joint Ventures That Provide Electrical Transmission Infrastructure Services Joint Ventures That Provide Electrical Transmission Infrastructure Services [Member] Joint venture(s) that provide(s) electrical transmission infrastructure services. 2029 Long-Term Debt, Maturity, Year Five Income Taxes [Line Items] 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. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Finance leases, assets, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Equity Component [Domain] Equity Component [Domain] West Virginia Laborers' Pension Trust Fund West Virginia Laborers Pension Trust Fund [Member] West Virginia Laborers Pension Trust Fund Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Swing Line Loans Bridge Loan [Member] Laborers' Local Union No. 158 Pension Plan Laborers Local Union No. 158 Pension Plan [Member] Laborers Local Union No. 158 Pension Plan Class of Treasury Stock [Table] Class of Treasury Stock [Table] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Joint Venture Civil Construction Project Joint Venture Civil Construction Project [Member] Ownership interest in a civil construction project. Fair value gain related to resolved contingent payments Increase (decrease) in contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Schedule II - Valuation and Qualifying Accounts [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Performance Standby Standby Letters of Credit Standby Letters of Credit [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Equity method investments, cumulative undistributed earnings Retained Earnings, Undistributed Earnings from Equity Method Investees Statement [Table] Statement [Table] Counterparty Name [Axis] Counterparty Name [Axis] Workers' Compensation Policy Accident and Health Insurance Product Line [Member] Consolidation Items [Domain] Consolidation Items [Domain] Mandatorily Redeemable Stock Mandatorily Redeemable Stock [Member] Shares that an entity is required to redeem for cash or other assets at a fixed or determinable date or upon the occurrence of an event. IBEW Local 456 Pension Plan IBEW Local 456 Pension Plan [Member] IBEW Local 456 Pension Plan Amortization Expense Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] Treasury stock reissued (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Midwest Operating Engineers Pension Trust Fund Midwest Operating Engineers Pension Trust Fund [Member] Midwest Operating Engineers Pension Trust Fund Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Total property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Capital expenditures Consolidated capital expenditures Payments to Acquire Productive Assets Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Compensation and benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Variable interest entity, percent Asset Acquisition, Percentage Of Voting Interest Acquired Asset Acquisition, Percentage Of Voting Interest Acquired Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Senior Notes Senior Notes [Member] Surety Bonds Surety Bond [Member] 2027 Long-Term Debt, Maturity, Year Three Business combinations, consolidated acquisition-related revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Accumulated Other Comprehensive Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity investments, adjusted cost basis, amount Equity Securities without Readily Determinable Fair Value, Amount Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Other Other Intangible Assets [Member] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Income Taxes Income Tax Disclosure [Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Repayments of credit facilities and term loans Repayments of Long-Term Lines of Credit Other Long-Term Liabilities Other Noncurrent Liabilities [Member] Operating leases Operating Lease, Weighted Average Discount Rate, Percent Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Weighted average remaining lease term (in years): Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term Credit Facility [Axis] Credit Facility [Axis] December 2018 Share Repurchase Program December 2018 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in December 2018. Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Entity Registrant Name Entity Registrant Name Payments to acquire businesses, gross Payments to Acquire Businesses, Gross Lease Arrangements [Axis] Lease Arrangements [Axis] Information by group of related lease arrangements. For example, but not limited to, leases grouped by asset class and/or contractual terms. Point in Time Transferred at Point in Time [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Consolidated depreciation and amortization Depreciation, Depletion and Amortization Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] BDO USA, P.C. BDO USA, P.C. [Member] BDO USA, P.C. State and local Deferred State and Local Income Tax Expense (Benefit) Fair Value as of Grant Date Award Grant Date Fair Value Customer Concentration Risk Customer Concentration Risk [Member] FIP/RP Status Multiemployer Plan, Pension, Significant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Customers Representing 10% Or More Of Company Customers Representing 10% Or More Of Company [Member] Customers Representing 10% Or More Of Company Construction Laborers Pension Trust for Southern California Construction Laborers' Pension Trust Fund for Southern California [Member] Construction Laborers' Pension Trust Fund for Southern California Remaining weighted average amortization period (in years) Finite-Lived Intangible Assets, Remaining Amortization Period Geographical [Domain] Geographical [Domain] Customer Relationships and Backlog Customer-Related Intangible Assets [Member] Fair value of shares issued Stock Issued During Period, Value, New Issues Unbilled receivables Unbilled Contracts Receivable Principles of Consolidation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Subcontracting Arrangements Subcontracting Arrangements [Member] The performance of services under a subcontracting arrangement. Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] Common stock, $0.10 par value: authorized shares - 145,000,000; issued shares - 99,029,011 and 99,093,134 (including 1,130,020 and 1,504,996 of unvested stock awards) as of December 31, 2024 and 2023, respectively Common Stock, Value, Issued Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Performance Obligation, Timing Of Recognition [Domain] Performance Obligation, Timing Of Recognition [Domain] Performance Obligation, Timing Of Recognition [Domain] Issuance of shares in connection with acquisition Stock Issued During Period, Value, Acquisitions Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Debt instrument, increase, accrued interest Debt Instrument, Interest Rate During Period Employer Identification Number Multiemployer Plan, Pension, Significant, Employer Identification Number Issuance of shares in connection with acquisition (in shares) Stock Issued During Period, Shares, Acquisitions State and local income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Contract with customer, unapproved change orders and/or claims, amount (in dollars) Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next 12 Months All Acquisitions All Acquisitions [Member] All Acquisitions Other Deferred Tax Assets, Other Multiemployer Plans [Line Items] Covered Employees and Contributions, Multiemployer Plans [Line Items] Multiemployer Plan [Line Items] Number of entities Variable Interest Entity, Primary Beneficiary, Number Of Entities Variable Interest Entity, Primary Beneficiary, Number Of Entities Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from sale of receivables Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount Preferred stock, $1.00 par value: authorized shares - 5,000,000; issued and outstanding shares – none Preferred Stock, Value, Issued New Term Loan Facility, Acquisition Adjustment New Term Loan Facility, Acquisition Adjustment [Member] New Term Loan Facility, Acquisition Adjustment Self-Insurance Self-Insurance Uninsured Risk [Member] Holders percentage Debt Instrument, Holders Percentage Debt Instrument, Holders Percentage Reporting Unit [Domain] Reporting Unit [Domain] Total deferred tax liabilities Deferred Tax Liabilities, Gross Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Financing commitments Contractual Obligation Current liabilities, primarily accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Ownership [Domain] Ownership [Domain] Accrued capital expenditures Capital Expenditures Incurred but Not yet Paid Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Goodwill [Table] Goodwill [Table] 2013 Incentive Plan 2013 Incentive Plan [Member] The MasTec, Inc. 2013 Incentive Compensation Plan ("2013 Incentive Plan"). Long Lived Assets, Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Other intangible assets Deferred Tax Liabilities, Intangible Assets Total current liabilities Liabilities, Current Share Repurchase Program [Axis] Share Repurchase Program [Axis] Equity method investments, distributions of earnings received, operating cash flows Proceeds from Equity Method Investment, Distribution Line of credit facility, capacity available for letters of credit Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Long-term line of credit Long-Term Line of Credit Business combinations, contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Other Intangible Assets [Roll Forward] Intangible Assets (Excluding Goodwill) [Roll Forward] Rollforward of intangible assets, excluding goodwill. EBITDA Reconciliation: Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Business Combinations Business Combinations Policy [Policy Text Block] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] New Term Loan Facility New Term Loan Facility [Member] New Term Loan Facility Revenue Revenues Stock-Based Compensation and Other Employee Benefit Plans Share-Based Payment Arrangement [Text Block] Ten Largest Customers Ten Largest Customers [Member] Ten largest customers. Entity Address, City or Town Entity Address, City or Town Goodwill Deferred Tax Liabilities, Goodwill Payments for withdrawal obligation Multiemployer Plans, Payments For Withdrawal Obligation Multiemployer Plans, Payments For Withdrawal Obligation Non-cash stock-based compensation expense Share-Based Payment Arrangement, Expense Identifiable assets acquired and liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Fair Value Disclosure of Liabilities Not Measured at Fair Value [Line Items] Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items] Commitments and Contingencies [Table] Loss Contingencies [Table] Canceled/forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Contributions (in millions) For the Years Ended December 31, Multiemployer Plan, Pension, Significant, Employer Contribution, Cost Business Acquisition [Axis] Business Acquisition [Axis] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Foreign Foreign Tax Jurisdiction [Member] Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Debt instrument, acquisition adjustment, maximum Debt Instrument, Acquisition Adjustment, Maximum Debt Instrument, Acquisition Adjustment, Maximum New Term Loan Facility, Three-Year Tranche New Term Loan Facility, Three-Year Tranche [Member] New Term Loan Facility, Three-Year Tranche Total multiemployer pension plan contributions Total multiemployer pension plan contributions Multiemployer Plan, Employer Contribution, Cost Unrealized gains (losses) on investment activity, net of tax Unrealized gains (losses) on equity investee activity, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Document Fiscal Year Focus Document Fiscal Year Focus Concentration Risk from Type of Arrangement Product Concentration Risk [Member] Acquisition of treasury stock, at cost Treasury stock acquired, value Treasury Stock, Value, Acquired, Cost Method Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Earn-Out Liabilities Earn-out Arrangements [Member] Acquisition-related contingent consideration and other liabilities is composed of “Earn-outs,” which represent the estimated fair value of future amounts payable for businesses and other interests, including for mandatorily redeemable non-controlling interests. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Five Statement of Financial Position Location, Activity, Capitalization [Domain] Statement of Financial Position Location, Activity, Capitalization [Domain] Document Period End Date Document Period End Date Less current portion Finance Lease, Liability, Current Base Rate Base Rate [Member] Equity investments, impairments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Unvested stock awards (in shares) Non-vested restricted shares, beginning balance (in shares) Non-vested restricted shares, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Asset Class [Axis] Asset Class [Axis] Insider Trading Arrangements [Line Items] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Deferred revenue, revenue recognized Contract with Customer, Liability, Revenue Recognized Monthly payment amount Multiemployer Plans, Withdrawal Obligation, Monthly Payment Amount Multiemployer Plans, Withdrawal Obligation, Monthly Payment Amount Document Transition Report Document Transition Report Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Depreciation Cost, Depreciation Former Owner Of Acquired Business Former Owner Of Acquired Business [Member] Former Owner Of Acquired Business Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Payments for other investments Payments to Acquire Other Investments Customer [Domain] Customer [Domain] Fair Value Measurements, Non-Recurring [Table] Fair Value, Recurring and Nonrecurring [Table] Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Amortization of deferred financing costs Amortization of Debt Issuance Costs Asset Acquisition [Domain] Asset Acquisition [Domain] Telecommunications Equity Method Investees Telecommunications Equity Method Investees [Member] Telecommunications Equity Method Investees 2024 and 2023 Acquisitions 2024 and 2023 Acquisitions [Member] 2024 and 2023 Acquisitions Restricted Stock Units Restricted Stock Units (RSUs) [Member] Consolidated Statements of Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Pipeline Industry Pension Fund Pipeline Industry Pension Fund [Member] Pipeline Industry Pension Fund Schedule of Provision for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Letters of Credit Letter of Credit Letter of Credit [Member] Long-term assets, primarily operating lease right-of-use assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Long-term Assets, Operating Right-of-use Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Long-term Assets, Operating Right-of-use Assets Company Selected Measure Name Company Selected Measure Name