Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] 2025 Share Repurchases Program 2025 Share Repurchases Program [Member] 2025 Share Repurchases Program Contingent Consideration, Fair Value Adjustments Contingent Consideration, Fair Value Adjustments [Member] Contingent Consideration, Fair Value Adjustments Maximum Maximum [Member] Schedule of Other Intangible Assets [Table] ScheduleOfIntangibleAssets [Table] Schedule of intangible assets, excluding goodwill. Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net income - diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Business combination, acquisition-related cost, expense Business Combination, Acquisition-Related Cost, Expense Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Weighted average interest rate (percentage) Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Restricted Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Weighted average discount rate: Leases, Weighted Average Discount Rate [Abstract] Leases, Weighted Average Discount Rate Common stock, $0.10 par value: authorized shares - 145,000,000; issued shares - 99,442,020 and 99,319,916 (including 1,025,810 and 1,038,778 of unvested stock awards) as of June 30, 2026 and December 31, 2025, respectively Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Schedule of Activity, Restricted Shares Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Payments for stock-based awards Payment, Tax Withholding, Share-Based Payment Arrangement Accrued salaries and wages Employee-related Liabilities, Current Schedule of Carrying Values of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Indemnities, accrued project close-out liabilities Loss Contingency Accrual Lease Obligations Lessee, Finance Leases [Text Block] Guarantor obligations, maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Equity investments, carrying value Equity method investments, net investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Earnings per share (Note 2): Earnings Per Unit [Abstract] 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. 2027 Finance Lease, Liability, to be Paid, Year One Total debt, net of deferred financing costs Long-Term Debt and Lease Obligation, Including Current Maturities Issuance of restricted shares, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Payments for acquisition-related contingent assets Payment for Contingent Consideration Asset, Financing Activities Payment for Contingent Consideration Asset, Financing Activities Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Proceeds from sale of equity method investments Proceeds from Sale of Equity Method Investments Goodwill [Line Items] Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Payments of finance lease obligations Finance Lease, Principal Payments Schedule of Earn-out Liabilities Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block] Standby Letters of Credit Standby Letters of Credit [Member] Property and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Finance leases, assets, gross Finance Lease, Right-of-Use Asset, before Accumulated Amortization Commitments and Contingencies [Table] Loss Contingencies [Table] Corporate Corporate EBITDA Corporate EBITDA Communications 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. Effect of share repurchases, decrease in weighted average shares outstanding (in shares) Effect Of Repurchases On Weighted Average Shares Outstanding, Decrease 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. 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Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Line of credit facility, interest rate (percentage) Line of Credit Facility, Interest Rate at Period End Net income - basic Net Income (Loss) Available to Common Stockholders, Basic Receivable [Domain] Receivable [Domain] Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Chairman, Board of Directors Board of Directors Chairman [Member] Revenue Benchmark Revenue Benchmark [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Unrealized gains (losses) on investment activity Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Depreciation and Amortization: Depreciation, Depletion and Amortization [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Capital expenditures incurred but not yet paid Capital Expenditures Incurred but Not yet Paid March 2020 Share Repurchase Program March 2020 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in March 2020. Land Land [Member] Contract liabilities Increase (Decrease) in Contract with Customer, Liability Schedule of Financial Information by Reportable Segment Segment Reporting [Table Text Block] Non-Controlling Interests Noncontrolling Interest [Member] Unsecured Debt Unsecured Debt [Member] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Business Combination, Recognized Liability Assumed, Liability, Noncurrent Business Combination, Recognized Liability Assumed, Liability, Noncurrent Property and Equipment, Net Property, Plant, and Equipment [Text Block] Customer Relationships and Backlog Customer-Related Intangible Assets [Member] Schedule of Future Minimum Lease Commitments, Operating Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Supplemental disclosure of non-cash information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Document Period End Date Document Period End Date Changes in assets and liabilities, net of acquisitions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Subsidiaries Subsidiaries [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Debt instrument, face amount Debt Instrument, Face Amount Contract assets Increase (Decrease) in Contract with Customer, Asset 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Treasury stock, at cost: 20,354,737 and 20,422,329 shares as of June 30, 2026 and December 31, 2025, respectively Treasury Stock, Common, Value Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Employee Leasing and Advanced Receivable Arrangement Employee Leasing And Advanced Receivable Arrangement [Member] One entity, the leasing company, leases its employees to another entity, the client company. Finance leases Finance Lease, Weighted Average Remaining Lease Term Debt instrument, ticking fees, rate Debt Instrument, Ticking Fees, Rate Debt Instrument, Ticking Fees, Rate 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 Impairments of equity method investments Equity Method Investment, Other-than-Temporary Impairment Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Fair value adjustments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Accounts receivable and contract assets Business Combination, Recognized Asset Acquired, Accounts Receivable And Contract Assets Business Combination, Recognized Asset Acquired, Accounts Receivable And Contract Assets Current portion of operating lease liabilities Less current portion Operating Lease, Liability, Current Debt instruments, accrued interest payable Interest Payable, Current Finance leases, assets, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Contract Assets [Abstract] Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract] Schedule of Property and Equipment, Net Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Unbilled receivables Unbilled Contracts Receivable Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Schedule of Earnings Per Share Schedule of Weighted Average Number of Shares [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Liabilities Trading Symbol Trading Symbol Discount Rate Measurement Input, Discount Rate [Member] Geographical [Domain] Geographical [Domain] Customer Relationships And Backlog Customer Relationships And Backlog [Member] Customer Relationships And Backlog 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Debt instrument, covenant, leverage ratio, maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Non-cash interest expense, net Amortization of Debt Issuance Costs and Discounts Business Combination, Contingent Consideration, Type [Axis] Business Combination, Contingent Consideration, Type [Axis] Additions to property and equipment from finance leases and other financing arrangements Right-of-Use Asset Obtained in Exchange for Finance Lease And Other Financing Arrangements Liability Right-of-Use Asset Obtained in Exchange for Finance Lease And Other Financing Arrangements Liability Line of credit facility, capacity available for letters of credit Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases Payments for other investments Payments to Acquire Other Investments Long-term debt obligations Long-Term Debt, Gross Credit Facility [Domain] Credit Facility [Domain] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Equity interest Business Combination, Voting Equity Interest Acquired, Percentage Gains on sales and impairments of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Diluted weighted average common shares outstanding (in shares) Weighted average shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Executive Officers Executive Officer [Member] Schedule of Accounts Receivable, Net of Allowance, and Contract Assets and Liabilities [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Revenue [Line Items] Disaggregation of Revenue [Line Items] Backlog Order or Production Backlog [Member] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] 2028 Finance Lease, Liability, to be Paid, Year Two Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), Total Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Underlying Security Market Price Change Underlying Security Market Price Change, Percent 2030 Finance Lease, Liability, to be Paid, Year Four Proceeds from lines of credit Proceeds from Lines of Credit Benefit from deferred income taxes Deferred Income Taxes and Tax Credits Property and equipment, net Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Captive Insurance Company Captive Insurance Company [Member] Captive Insurance Company T. Michael Love [Member] T. Michael Love Notes receivable Financing Receivable Face Amount Financing Receivable Face Amount Less amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Business acquisition, goodwill, expected tax deductible amount Business Combination, Goodwill, Expected Tax Deductible, Amount Schedule of Stock-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Reporting entity involvement, maximum loss exposure, amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Other Equity Method Investments Other Equity Method Investments [Member] Other Equity Method Investments Dilutive common stock equivalents (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Less amounts representing interest Finance Lease, Liability, Undiscounted Excess Amount Less accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Other Other Intangible Assets [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Line of credit facility, letters of credit issued Letters of credit issued Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Non-cash stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items] Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items] Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, low Business Combination, Contingent Consideration, Range of Outcomes, Minimum, Amount Effective tax rate, expense (benefit) Effective Income Tax Rate Reconciliation, Percent Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Equipment, Supplies and Services Equipment, Supplies And Services [Member] Purchases, rentals and lease of equipment and purchases of various types of supplies and services. Number of management members, subcontracting arrangement Number Of Management Members Number of persons from management with an ownership interest in the related party entity Non-vested restricted shares, beginning balance (in dollars per share) Non-vested restricted shares, ending 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 All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayments of credit facilities and term loans Repayments of Long-Term Lines of Credit Robert Apple [Member] Robert Apple Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Asset Acquisition [Domain] Asset Acquisition [Domain] Value of receivables sold Transfer of Financial Assets Accounted for as Sales, Fair Value of Derecognized Assets Operating lease right-of-use assets Operating Lease, Right-of-Use Asset 6.625% Senior Notes Six Point Six Two Five Percent Senior Notes [Member] Six Point Six Two Five Percent Senior Notes Concentration Risk Type [Domain] Concentration Risk Type [Domain] Contract with customer liability, deferred revenue current Contract With Customer Liability Deferred Revenue Current Amount of obligation, excluding accrued projected losses, on transfer good or service to customer for which consideration has been received or is receivable, classified as current. 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Useful life Intangible Asset, Finite-Lived, Useful Life Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Issuance of restricted shares, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Related Party Transaction [Axis] Related Party Transaction [Axis] Change order or claim approval process, term within which expected to be completed 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. Segments and Related Information [Line Items] Segment Reporting [Line Items] Share repurchase program, amount authorized, value Share Repurchase Program, Authorized, Amount Net income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Total net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill, Less Noncontrolling Interest Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Accounts receivable, after allowance for credit loss Accounts Receivable, after Allowance for Credit Loss Less unamortized deferred financing costs Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Business Combination [Table] Business Combination [Table] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Number of customers Number Of Customers Number of customers. Performance and Payment Bonds Performance Guarantee [Member] Contract billings Accounts Receivable, before Allowance for Credit Loss, Current Adoption Date Trading Arrangement Adoption Date Finance leases Finance Lease, Weighted Average Discount Rate, Percent Counterparty Name [Domain] Counterparty Name [Domain] Debt instrument, interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Total MasTec, Inc. shareholders’ equity Equity, Attributable to Parent Other (income) expense, net Nonoperating Income (Expense) Revenue recognition, changes In contract estimates, cost-to-cost method, financial effect, percentage (less than) 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. Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Business acquisition, number of shares issued (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total lease obligations, net of interest Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Total lease obligations, net of interest Finance Lease, Liability Commencing 2027 Commencing 2027 [Member] Commencing 2027 Net income attributable to MasTec: Net Income (Loss) Attributable to Parent, Diluted [Abstract] Measurement period adjustments Goodwill, Measurement Period Adjustment Less allowance Accounts Receivable, Allowance for Credit Loss, Current Other financing activities, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Retainage Contract Retainage Amounts billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract. Proceeds from other investments Proceeds from Sale and Maturity of Other Investments 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. Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table] Business Combination [Domain] Business Combination [Domain] Letters of Credit Letter of Credit [Member] Accrued project costs Construction Payable, Current Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Anti-dilutive common stock (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted Stock Units Restricted Stock Units (RSUs) [Member] Schedule of Goodwill by Segment Goodwill [Table Text Block] Goodwill Goodwill, Gross Central Index Key (CIK) Entity Central Index Key Weighted Average Weighted Average [Member] Capital surplus Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] 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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Revenue, remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report 5.900% Senior Notes Five Point Nine Percent Senior Notes [Member] Five Point Nine Percent Senior Notes Ownership [Axis] Ownership [Axis] Investment, Name [Axis] Investment, Name [Axis] Long-term portion of lease obligations, net of interest Finance Lease, Liability, Noncurrent Assets held under finance leases, location Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Debt instrument, periodic payment Debt Instrument, Periodic Payment Eliminations Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Intangible Asset, Finite-Lived Intangible Asset, Finite-Lived [Table Text Block] Debt Instrument, Four-Year Tranche Debt Instrument, Four-Year Tranche [Member] Debt Instrument, Four-Year Tranche Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] AT&T AT&T [Member] AT&T Govermment Government Transactions [Member] Activities related to government transactions. Total minimum lease payments Finance Lease, Liability, to be Paid Property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Restricted Stock Awards Restricted Stock [Member] All Individuals All Individuals [Member] Corporate Corporate Segment [Member] Management Management [Member] Name Forgone Recovery, Individual Name Stock-based compensation awards, unearned compensation, weighted average expected recognition period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] 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] Statement [Line Items] Statement [Line Items] Total assets Consolidated assets Assets Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Discount charges related to financing arrangements Interest expense, net Interest Expense, Operating Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Reportable Segments Operating Segments Operating Segments [Member] Interest expense, net Interest Expense, Nonoperating Immediate Family Member of Management Immediate Family Member of Management or Principal Owner [Member] Contract liabilities Business Combination, Recognized Liability Assumed, Liability Stockholders' Equity Share-Based Payment Arrangement [Text Block] Other assets, current and long-term portion Increase (Decrease) in Other Operating Assets PEO PEO [Member] Life insurance assets, carrying amount Cash Surrender Value of Life Insurance Self-insurance reserve Self Insurance Reserve Non-cash stock-based compensation expense Share-Based Payment Arrangement, Expense Other long-term liabilities Other Liabilities, Noncurrent Acquisitions, Goodwill, and Other Intangible Assets, Net Acquisitions, Goodwill, and Intangible Assets, Disclosure [Text Block] Acquisitions, Goodwill, and Intangible Assets, Disclosure Goodwill, net Goodwill, net Goodwill, net, beginning balance Goodwill, net, ending balance Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Additions from new business combinations Goodwill, Acquired During Period 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 Accounts payable Business Combination, Recognized Liability Assumed, Accounts Payable, Current Deferred revenue, revenue recognized Contract with Customer, Liability, Revenue Recognized 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. Subsequent Event Type [Domain] Subsequent Event Type [Domain] Payables and Accruals [Abstract] Income, sales and other taxes Taxes Payable, Current Retained Earnings Retained Earnings [Member] Long-term operating lease liabilities Long-term portion of lease obligations, net of interest Operating Lease, Liability, Noncurrent Revolving Loans Revolving Commitments Revolving Credit Facility [Member] 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 Software, In-Development, Internally Developed, and Purchased Software, In-Development, Internally Developed, and Purchased [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Condensed Unaudited Consolidated Statements of Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid after the fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Shares withheld for taxes, net of other stock issuances Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Amortization expense Intangible Asset, Finite-Lived, Amortization Expense Ownership [Domain] Ownership [Domain] Business Combination, Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Proceeds from credit facilities and term loans Proceeds from Long-Term Lines of Credit Construction Services Construction Services [Member] Construction services. Lease Contractual Term [Domain] Lease Contractual Term [Domain] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Receivables, Non-Recourse Arrangement Financing Receivable [Member] Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Lease Agreements Lease Agreements [Member] Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Segment EBITDA EBITDA Earnings before interest, taxes, depreciation and amortization ("EBITDA"), a non-U.S. GAAP financial measure. Line of credit facility, unused facility fee (percentage) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commencing 2028 Commencing 2028 [Member] Commencing 2028 Surety Bonds Surety Bond [Member] Power Delivery Power Delivery [Member] The engineering, construction and maintenance of electrical transmission lines and substations, primarily for the energy and utility industries. Summary of Investment Activity Equity Method Investments [Table Text Block] HMG 2021 Acquisitions, Henkels & McCoy Group, Inc. [Member] 2021 Acquisitions, Henkels & McCoy Group, Inc. Less: non-controlling interest Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Other intangible assets, gross Intangible Asset, Excluding Goodwill, before Accumulated Amortization Prepaid expenses Prepaid Expense, Current Consolidated leverage ratio, maximum Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items] Construction in progress Construction in Progress [Member] Other investing activities, net Payment for (Proceeds from) Other Investing Activity Inventories Increase (Decrease) in Inventories Issuance of shares in connection with acquisition (in shares) Stock Issued During Period, Shares, Acquisitions Operating leases Operating Lease, Weighted Average Discount Rate, Percent Amortization of intangible assets Amortization Cost, Amortization Payments to non-controlling interests, including acquisition of interests and distributions Proceeds from (Payments to) Noncontrolling Interests Segments and Related Information [Table] Segment Reporting [Table] Stock-based compensation plans, number of shares available for future grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Leases, remaining lease terms 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. Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Finance lease liability, current, location Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant Business combination, acquiree's revenue since acquisition date, actual Business Combination, Acquiree's Revenue since Acquisition Date, Actual Other Accrued Expenses Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Business combination, contingent consideration, current Business Combination, Contingent Consideration, Liability, Current Other current assets Other Assets, Current Equity in earnings of unconsolidated affiliates, net Income (Loss) From Equity Method Investments, Net Of Impairment Income (Loss) From Equity Method Investments, Net Of Impairment Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Revenue recognition, remaining performance obligations, contract price allocated Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Future Minimum Lease Commitments, Finance Leases Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Employee Group Medical Claims Group Insurance Policy [Member] 2026, remaining six months Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Thereafter Finance Lease, Liability, To Be Paid, After Year Four Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after the fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Related Party Transaction [Domain] Related Party Transaction [Domain] Additions from new business combinations Intangible Assets Acquired, Gross (Excluding Goodwill) Amount of increase in intangible assets, excluding goodwill, from an acquisition. Senior notes, estimated fair value Notes Payable, Fair Value Disclosure 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". 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] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] CCI Cross Country Infrastructure [Member] Cross Country Infrastructure Services, Inc. ("CCI") (business name). 2026 Term Loan Facility 2026 Term Loan Facility [Member] 2026 Term Loan Facility 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". Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Senior notes, gross carrying amount Senior Notes Common stock, shares issued (in shares) Beginning balance, common shares outstanding (in shares) Ending balance, common shares outstanding (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Treasury stock, shares (in shares) Beginning balance, treasury shares (in shares) Ending balance, treasury shares (in shares) Treasury Stock, Common, Shares Costs of revenue, excluding depreciation and amortization Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Related Party Related Party [Member] Type of Agreement [Domain] Product and Service [Domain] Income tax (refunds) payments, net Income Tax Paid, after Refund Received Revenue [Table] Disaggregation of Revenue [Table] 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. Entity Interactive Data Current Entity Interactive Data Current Less current portion Finance Lease, Liability, Current Variable Rate [Axis] Variable Rate [Axis] Business combination, acquiree's earnings (loss) since acquisition date, actual Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Net income attributable to non-controlling interests Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Schedule Of Weighted Average Remaining Lease Terms And Discount Rates Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Number of joint ventures Number of Joint Ventures Number of joint ventures in which the Company has an interest. Entity Small Business Entity Small Business Comprehensive income attributable to MasTec, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Shares withheld for taxes, net of other stock issuances (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Property and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Contract with customer, unapproved change orders and/or claims, amount Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next 12 Months 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] Payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Fair Value Measurements, Recurring [Table] Fair Value Measurements, Non-Recurring [Table] Fair Value, Recurring and Nonrecurring [Table] Amortizing intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other long-term assets Other Assets, Noncurrent 2029 Finance Lease, Liability, to be Paid, Year Three Document Type Document Type Cash paid for acquisitions, net of cash acquired Cash paid Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Financial Instruments Measured on a Recurring Basis [Line Items] 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] Other accrued expenses Other accrued expenses Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Joint Venture Civil Construction Project Joint Venture Civil Construction Project [Member] Ownership interest in a civil construction project. Leases, renewal term Lessee, Lease, Renewal Term Term of lessee's lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Foreign currency translation (losses) gains Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Operating costs and expenses Operating Costs and Expenses Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Business, Basis of Presentation and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Measurement period adjustments Intangible Assets Excluding Goodwill, Purchase Accounting Adjustments Intangible Assets Excluding Goodwill, Purchase Accounting Adjustments Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commercial and/or Financial Standby Financial Standby Letter of Credit [Member] Commitments and contingencies (Note 13) Commitments and Contingencies Revenue Revenues Finance lease liability, long-term, location Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity in earnings of unconsolidated affiliates, net Equity in earnings Income (Loss) from Equity Method Investments Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Machinery, equipment and vehicles Machinery and Equipment [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Finance leases, assets, depreciation Finance Lease, Right-of-Use Asset, Amortization Receivable Type [Axis] Receivable Type [Axis] Counterparty Name [Axis] Counterparty Name [Axis] Office equipment, furniture and internal-use software Furniture and Fixtures [Member] Goodwill [Roll Forward] Goodwill [Roll Forward] Point in Time Transferred at Point in Time [Member] Liabilities and equity Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Trade Names Trade Names [Member] Supplier finance program obligation Supplier Finance Program, Obligation Inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 2026, remaining six months Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2026 Acquisitions 2026 Acquisitions [Member] 2026 Acquisitions Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Business Combination, Contingent Consideration Business Combination, Contingent Consideration [Table Text Block] Acquisition of treasury stock, at cost (in shares) Treasury stock acquired (in shares) Treasury Stock, Shares, Acquired Operating leases, term of contract Lessee, Operating Lease, Term of Contract Subsidiary, ownership percentage, noncontrolling owner Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Geographical [Axis] Geographical [Axis] Stock-based compensation, vested awards, net income tax (shortfall) benefit 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. Debt Instrument, Three-Year Tranche Debt Instrument, Three-Year Tranche [Member] Debt Instrument, Three-Year Tranche Other segment items Segment Reporting, Other Segment Item, Amount Property and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Less: cash acquired Cash Acquired from Acquisition Payments of acquisition-related contingent consideration Payments to non-controlling interests, including acquisition of interests and distributions Payment for Contingent Consideration Liability, Financing Activities Business combination, consideration transferred, equity interest, share issued, value Business Combination, Consideration Transferred, Equity Interest, Share Issued, Value Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Acquisition-related contingent consideration liabilities, measurement input, discount rate Business Combination, Contingent Consideration, Liability, Measurement Input Stock-based compensation, income tax benefits Share-Based Payment Arrangement, Expense, Tax Benefit Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Self-insurance and related liabilities Self Insurance Reserve, Current Acquisition of treasury stock, at cost Treasury stock acquired, value Treasury Stock, Value, Acquired, Cost Method Concentration Risk from Type of Arrangement Product Concentration Risk [Member] Other Intangible Assets [Line Items] Intangible Assets [Line Items] Line items for intangible assets, excluding goodwill. Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Stock issued during period, value, treasury stock reissued Stock Issued During Period, Value, Treasury Stock Reissued Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Workers' Compensation Accident and Health Insurance Product Line [Member] Weighted average remaining lease term (in years): Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Equity method investments, ownership percentage Equity Method Investment, Ownership Percentage Cash paid Payments to Acquire Businesses, Gross Non-cash stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Superior Acquisition Superior Acquisition [Member] Superior Acquisition Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] Lease Obligations Lessee, Operating Leases [Text Block] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings per share (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Repurchases of common stock Payments for Repurchase of Common Stock Contract liabilities Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Equipment Leases Equipment Leases [Member] Amount pertaining to leasing of equipment. Operating leases, short-term leases, expense Short-Term Lease, Cost Award Type [Axis] Award Type [Axis] Subcontracting Arrangements Subcontracting Arrangements [Member] The performance of services under a subcontracting arrangement. Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance Accounts receivable, net of allowance Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Contingent Consideration, Value Of Common Stock Contingent Consideration, Value Of Additional Payments [Member] Contingent Consideration, Value Of Additional Payments Type of Agreement [Axis] Product and Service [Axis] Additional receivables Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Master Service and Other Service Agreements Master Service And Other Service Agreements [Member] Master service and other service agreements. Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Facility Leases Facility Leases [Member] Amount pertaining to leasing of facilities. Long-term assets, primarily operating lease right-of-use assets Business Combination, Recognized Asset Acquired, Operating Lease Right-Of-Use Assets Business Combination, Recognized Asset Acquired, Operating Lease Right-Of-Use Assets Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Balance as of beginning of period Balance as of end of period Obligations, Fair Value Disclosure Common Stock Common Stock [Member] Earn-out liability Business Combination, Contingent Consideration, Liability Operating lease expense Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Debt Instrument, Tranche [Axis] Debt Instrument, Tranche [Axis] Debt Instrument, Tranche Finite And Indefinite Lived Intangible Assets By Major Class [Domain] Finite And Indefinite Lived Intangible Assets By Major Class [Domain] Finite And Indefinite Lived Intangible Assets By Major Class [Domain] Cover [Abstract] Cover [Abstract] All Acquisitions All Acquisitions [Member] All acquisitions completed. Other accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Accrued Expenses Foreign Operations Non-US [Member] Number of entities Variable Interest Entity, Primary Beneficiary, Number Of Entities Variable Interest Entity, Primary Beneficiary, Number Of Entities Concentration risk, percentage of total Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Term Loan Loans Payable [Member] Currency translation adjustments Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Intangible assets and goodwill, net Intangible Asset, Including Goodwill, after Accumulated Amortization Operating leases, variable lease costs Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Workers' Compensation, General and Automobile Policies Property, Liability and Casualty Insurance Product Line [Member] Non-controlling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Other liabilities, current and long-term portion Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Schedule of Accounts Receivable, Net of Allowance, and Contract Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Proportionately consolidated non-controlled joint venture, ownership percentage Proportionately Consolidated Joint Venture Ownership Percentage The percentage interest in a proportionately consolidated joint venture. Debt Long-Term Debt [Text Block] Total MasTec, Inc. Shareholders’ Equity Parent [Member] Finite And Indefinite Lived Intangible Assets By Major Class [Axis] Finite And Indefinite Lived Intangible Assets By Major Class [Axis] Finite And Indefinite Lived Intangible Assets By Major Class Schedule of Accounts Payable and Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Foreign currency translation losses attributable to non-controlling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Canceled/forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Other Intangible Assets [Roll Forward] Intangible Assets (Excluding Goodwill) [Roll Forward] Rollforward of intangible assets, excluding goodwill. General and administrative expenses General and Administrative Expense Property and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Business Combination, Contingent Consideration, Type [Domain] Business Combination, Contingent Consideration, Type [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Debt Covenant [Domain] Debt Covenant [Domain] Debt Covenant [Domain] Assets: Capital Expenditures: Segment Reporting, Other Disclosure [Abstract] Schedule of Property and Equipment, Net [Table] Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, $1.00 par value: authorized shares - 5,000,000; issued and outstanding shares – none Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Credit Facility Domestic Line of Credit [Member] Pipeline Infrastructure Pipeline Infrastructure [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Ten Largest Customers Ten Largest Customers [Member] Ten largest customers. Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Insurance receivables Insurance Settlements Receivable, Noncurrent Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Capital expenditures Consolidated capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Assets acquired and liabilities assumed: Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract] 2025 Acquisitions 2025 Acquisitions [Member] 2025 Acquisitions Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable Long-term debt, including finance leases Long-term debt Long-Term Debt and Lease Obligation Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other Other Operating Segment [Member] Other non-cash items, net Other Noncash Income (Expense) Non-controlling interests assumed related to acquisitions Noncontrolling Interest, Increase from Business Combination Self-Insurance Uninsured Risk [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Total consideration paid, net Total consideration paid, net Business Combination, Consideration Transferred Capital Surplus Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Equipment Equipment [Member] Acquisition adjustment, maximum Debt Instrument, Acquisition Adjustment, Maximum Debt Instrument, Acquisition Adjustment, Maximum Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Prepaid expenses Business Combination, Recognized Asset Acquired, Prepaid Expenses Business Combination, Recognized Asset Acquired, Prepaid Expenses 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, including for mandatorily redeemable non-controlling interests (together, “Earn-outs”), that are contingent upon the acquired business achieving certain levels of earnings in the future. Name Trading Arrangement, Individual Name Stock-based compensation awards, unearned compensation Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Debt instrument, interest rate during period Debt Instrument, Interest Rate During Period 2025 Term Loan Facility 2025 Term Loan Facility [Member] 2025 Term Loan Facility Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Distributions of earnings Proceeds from Equity Method Investment, Distribution Reconciliation of Consolidated Income before Income Taxes to EBITDA Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Consolidated depreciation and amortization Depreciation, Depletion and Amortization Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Schedule of Accounts Receivable [Table] Accounts and Financing Receivables [Table] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Translation of Foreign Currencies Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One Operating leases, additions Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 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 Provision for income taxes Income Tax Expense (Benefit) Depreciation Cost, Depreciation Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Principles of Consolidation Consolidation, Policy [Policy Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Net income attributable to MasTec, Inc. Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Corporate Joint Venture Corporate Joint Venture [Member] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Proceeds from sales of property and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Impairments of equity method investments Equity Method Investments, Impairment Equity Method Investments, Impairment Restatement Determination Date: Restatement Determination Date [Axis] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Proceeds from sale of receivables Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount Interest rate on notes receivable Financing Receivable, Interest Rate Financing Receivable, Interest Rate Foreign Denomination Foreign Denomination [Member] Contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars, in Canadian dollars and/or Mexican pesos. Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]