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Communications and Electrical Transmission Communications and Electrical Transmission [Member] Assets acquired pertain to the Communications and Electrical Transmission segments. 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Joint Venture Civil Construction Project [Member] Joint Venture Civil Construction Project[Member] [Domain] Ownership interest in a civil construction project. Translation of Foreign Currencies Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code 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. EBITDA: Segment Reporting Information, Income (Loss) before Income Taxes [Abstract] ESPP purchase price, percent Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Goodwill, net Goodwill, net Goodwill Schedule of Revenue by Major Customers by Reporting Segments Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Document Transition Report Document Transition Report Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Unrealized gains (losses) on AVCT convertible debentures, before tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Additions from new business combinations Intangible Assets Acquired, Gross (Excluding Goodwill) Amount of increase in intangible assets, excluding goodwill, from an acquisition. Building and Leasehold Improvements [Member] Building and Building Improvements [Member] Other current assets Other Assets, Current Restricted Shares [Member] Restricted Stock And Restricted Stock Units [Member] Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met ("Restricted Stock") or share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met ("Restricted Stock Units"). Restricted Stock Awards and Restricted Stock Units are together referred to as "Restricted Shares". Document Quarterly Report Document Quarterly Report 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 Schedule of Goodwill by Segment Schedule of Goodwill [Table Text Block] Asset Class [Domain] Asset Class [Domain] Equity [Abstract] Equity [Abstract] Receivables, related party Receivables, net, related party Accounts Receivable, Related Parties CCI [Member] Cross Country Infrastructure [Member] Cross Country Infrastructure Services, Inc. ("CCI") (business name). Install to Home Install to Home [Member] Maintenance and customer fulfillment activities primarily related to install-to-the-home services. Waha JVs [Member] 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". Supplemental disclosure of non-cash information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Additions from new business combinations, non-amortizing intangible assets Indefinite-lived Intangible Assets Acquired Contract liabilities Contract with Customer, Liability, Current Performance and Payment Bonds [Member] Performance Guarantee [Member] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Credit Facility [Domain] Credit Facility [Domain] Diluted weighted average common shares outstanding Weighted average shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Letters of Credit [Member] Letter of Credit [Member] Basic earnings per share (in dollars per share) Earnings Per Share, Basic Number of operating segments Number of Operating Segments Amortization of intangible assets Cost, Amortization Entity File Number Entity File Number Canceled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Debt Disclosure [Abstract] Debt Disclosure [Abstract] Other Current Liabilities [Member] Other Current Liabilities [Member] Operating leases, weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Additions from new business combinations, amortizing intangible assets Finite-lived Intangible Assets Acquired Joint Ventures That Provide Electrical Transmission Infrastructure Services [Member] Joint Ventures That Provide Electrical Transmission Infrastructure Services [Member] Joint venture(s) that provide(s) electrical transmission infrastructure services. Electrical Transmission [Member] Electrical Transmission [Member] The engineering, construction and maintenance of electrical transmission lines and substations, primarily for the energy and utility industries. Non-cash interest expense, net Amortization of Debt Issuance Costs and Discounts Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Number of joint ventures Number of Joint Ventures Number of joint ventures in which the Company has an interest. Revenue recognition, remaining performance obligations, contract price allocated (in dollars) Revenue, Remaining Performance Obligation, Amount Non-cash stock-based compensation expense Share-based Payment Arrangement, Expense Balance Sheet Location [Axis] Balance Sheet Location [Axis] Common stock, $0.10 par value: authorized shares - 145,000,000; issued shares - 93,253,268 and 93,107,440 (including 1,870,460 and 1,843,041 of unvested stock awards) as of March 31, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Stock-based compensation, income tax benefits Share-based Payment Arrangement, Expense, Tax Benefit Schedule of Accounts Receivable, Net of Allowance, and Contract Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Entity Current Reporting Status Entity Current Reporting Status 2025 Finance Lease, Liability, to be Paid, Year Four Acquisition-related contingent consideration liabilities, net increase (decrease), fair value adjustments, expense (income) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings 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. Retirement Benefits [Abstract] Retirement Benefits [Abstract] Intangible assets and goodwill, net Intangible Assets, Net (Including Goodwill) Related Party Transaction [Axis] Related Party Transaction [Axis] Receivable [Domain] Receivable [Domain] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Contract assets Increase (Decrease) in Contract with Customer, Asset Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest 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 Negative equity method investment EquityMethodInvestmentNegativeAmount Negative equity method investment, presented as a liability Operating Leases [Table] Schedule of Operating Leased Assets [Table] Contract Assets [Abstract] Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract] Pro Forma Financial Information and Acquisition Results [Abstract] Business Acquisition, Pro Forma Information [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, shares issued Beginning balance, common shares outstanding (in shares) Ending balance, common shares outstanding (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash Cash and Cash Equivalents, at Carrying Value Schedule of Covered Employees and Contributions, Multiemployer Plans Multiemployer Plan [Table Text Block] Total lease obligations, net of interest Operating Lease, Liability Capitalized internal-use software, net Capitalized Computer Software, Net Community Condotte DeMoya JV, LLC [Member] Community Condotte DeMoya JV, LLC [Member] Equity investment of Community Condotte DeMoya JV, LLC. Segment Reporting [Abstract] Segment Reporting [Abstract] EBITDA Reconciliation: Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Total MasTec, Inc. shareholders’ equity Stockholders' Equity Attributable to Parent Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total liabilities and equity Liabilities and Equity Ten Largest Customers [Member] Ten Largest Customers1 [Member] Ten largest customers. Commitments and Contingencies [Line Items] Loss Contingencies [Line Items] Business combinations, number of acquisitions Number of Businesses Acquired Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Entity Address, City or Town Entity Address, City or Town Depreciation Cost, Depreciation Accrued salaries and wages Employee-related Liabilities, Current Construction Management Firm Specializing in Steel Building Systems [Member] Construction Management Firm Specializing In Steel Building Systems [Member] A construction management firm specializing in steel building systems. Restricted Stock Units [Member] Restricted Stock Units (RSUs) [Member] Total MasTec, Inc. Shareholders' Equity [Member] Parent [Member] Customer with Second Largest Net Accounts Receivable Position [Member] Customer With Second Highest Net Accounts Receivable Position [Member] Customer who accounted for the second highest/largest net accounts receivable position, which represents accounts receivable, net, less billings in excess of costs and earnings. General and administrative expenses General and Administrative Expense Financial Instrument [Axis] Financial Instrument [Axis] Accounting Standards Update [Domain] Accounting Standards Update [Domain] Stock-based compensation, vested awards, net tax benefits (deficiencies) 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. Anti-dilutive common stock (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Finance leases, weighted average remaining lease term (in years) Finance Lease, Weighted Average Remaining Lease Term Other non-cash items, net Other Noncash Income (Expense) Operating leases, short-term leases, expense Short-term Lease, Cost Non-Amortizing Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Equity Component [Domain] Equity Component [Domain] Equity investment ownership, percentage Equity Investment, Ownership Percentage The percentage of ownership of common stock or equity participation in an investee. Excludes proportionately consolidated investees and investees accounted for under the equity method of accounting. Unrealized gains (losses) on AVCT convertible debentures, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Line of credit facility, interest rate (percentage) Line of Credit Facility, Interest Rate at Period End Executive Officers [Member] Executive Officer [Member] Other Intangible Assets [Line Items] Intangible Assets [Line Items] Line items for intangible assets, excluding goodwill. Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Construction in Progress [Member] Construction in Progress [Member] Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Payments for life insurance policies Payment to Acquire Life Insurance Policy, Investing Activities Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Stock-Based Compensation and Other Employee Benefit Plans Share-based Payment Arrangement [Text Block] Confluence [Member] Confluence [Member] Confluence Networks, LLC (business name), referred to as "Confluence." Net income attributable to MasTec, Inc. Net income - basic (in dollars) Net Income (Loss) Attributable to Parent Long-term portion of lease obligations, net of interest Finance Lease, Liability, Noncurrent Changes in assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Other current liabilities Other Liabilities, Current 2021, remaining nine months Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year December 2018 Share Repurchase Program [Member] December 2018 Share Repurchase Program [Member] Share repurchase program authorized by the board of directors in December 2018. Goodwill, Gross [Member] Goodwill, Gross [Member] Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Investment, Name [Domain] Investment, Name [Domain] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Trade Names [Member] Trade Names [Member] Leases [Abstract] Leases [Abstract] Long-Term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Earnings Per Share [Abstract] Earnings Per Share [Abstract] Total lease obligations, net of interest Finance Lease, Liability Goodwill, Accumulated Impairment Loss [Member] Goodwill, Accumulated Impairment Loss [Member] Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Employee Leasing Arrangement Employee Leasing Arrangement [Member] One entity, the leasing company, leases its employees to another entity, the client company. Compensation Related Costs [Abstract] Equipment Leases [Member] Equipment Leases [Member] Amount pertaining to leasing of equipment. Subcontracting Arrangements [Member] Subcontracting Arrangements [Member] The performance of services under a subcontracting arrangement. Capitalized internal-use software, gross Capitalized Computer Software, Gross Equity Stockholders' Equity Attributable to Parent [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Treasury Stock [Member] Treasury Stock, Common [Member] Master Service and Other Service Agreements [Member] Master Service And Other Service Agreements [Member] Master service and other service agreements. Facility Leases [Member] Facility Leases [Member] Amount pertaining to leasing of facilities. Other Credit Facilities [Member] Foreign Line of Credit [Member] Financing receivables Other Receivables, Net, Current Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Loans Receivable [Member] Loans Receivable [Member] Common shares issued (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Corporate Joint Venture [Member] Proportionately Consolidated Non-Controlled Joint Venture [Member] Corporate Joint Venture [Member] Commercial and/or Financial Standby [Member] Financial Guarantees [Member] Financial Standby Letter of Credit [Member] Entity Filer Category Entity Filer Category Common Stock [Member] Common Stock [Member] Property and Equipment [Line Items] Property, Plant and Equipment [Line Items] Type of Agreement [Domain] Insurance Policies By Type [Domain] Product and Service [Domain] Property and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] 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). Geographic Concentration Risk [Member] Geographic Concentration Risk [Member] Finance leases, weighted average discount rate, percent Finance Lease, Weighted Average Discount Rate, Percent Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Fair Value Disclosure of Liabilities Not Measured at Fair Value [Table] Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Other intangible assets, amortizing, gross Finite-Lived Intangible Assets, Gross Revenue Benchmark [Member] Revenue [Member] Revenue Benchmark [Member] Proportionately consolidated non-controlled joint venture, ownership percentage Proportionately Consolidated Joint Venture Ownership Percentage The percentage interest in a proportionately consolidated joint venture. Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, low Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Senior Notes, gross carrying amount Senior Notes Debt instrument, interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Enbridge, Inc. Enbridge, Inc. [Member] Enbridge, Inc. (business name). Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Mobilization Costs Mobilization Costs [Member] Mobilization Costs Contract assets Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Other Intangible Assets [Rollforward] Intangible Assets (Excluding Goodwill) [Roll Forward] Rollforward of intangible assets, excluding goodwill. Revenue recognition, performance obligations satisfied in previous periods, revenue recognized (in dollars) Contract with Customer, Performance Obligation Satisfied in Previous Period Related Party Transactions [Abstract] Related Party Transactions [Abstract] Net increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Other income, net Nonoperating Income (Expense) Finance leases, assets, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Schedule of Future Minimum Lease Commitments, Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Equity, Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Basic weighted average common shares outstanding Weighted average shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Equity investments, carrying value Equity method investments, net investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Ownership [Axis] Ownership [Axis] Treasury stock, shares Beginning balance, treasury shares (in shares) Ending balance, treasury shares (in shares) Treasury Stock, Common, Shares Ownership [Domain] Ownership [Domain] Commitments and Contingencies [Table] Loss Contingencies [Table] Payments for advance to affiliate Payments for Advance to Affiliate Equity method investments, ownership percentage Equity Method Investment, Ownership Percentage Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Employee Group Medical Claims [Member] Group Insurance Policy [Member] Other stock issuances, net of shares withheld for taxes (in shares) Stock Issued During Period, Shares, Other Equity investments, adjusted cost basis, amount Equity Securities without Readily Determinable Fair Value, Amount Total equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Operating leases, additions Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 2021, remaining nine months Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Revenue Revenue (in dollars) Revenues Provision for income taxes Income Tax Expense (Benefit) Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Gains on sales of assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Clean Energy and Infrastructure and Communications Clean Energy and Infrastructure and Communications [Member] Assets acquired pertain to the Clean Energy and Infrastructure and the Communications segments. Debt instrument, maturity date Debt Instrument, Maturity Date Accounting Standards Update and Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Non-Amortizing Intangible Assets [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Other accrued expenses Accrued Liabilities, Current Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Less current portion Finance Lease, Liability, Current Local Phone Number Local Phone Number Business combinations, consolidated acquisition-related revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Earn-Out Liabilities [Member] Earn-out Arrangements [Member] Acquisition-related contingent consideration, or “earn-outs,” represent the estimated fair value of future amounts payable for acquisitions of businesses and other interests. Equity investments, impairments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Long-term debt obligations Long-term Debt, Gross Schedule of Carrying Values of Debt Schedule of Long-term Debt Instruments [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Related Party Transaction [Domain] Related Party Transaction [Domain] Other assets, current and long-term portion Increase (Decrease) in Other Operating Assets Entity Emerging Growth Company Entity Emerging Growth Company Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Other intangible assets, non-amortizing Other intangible assets, non-amortizing, beginning balance Other intangible assets, non-amortizing, ending balance Indefinite-lived Intangible Assets (Excluding Goodwill) Acquisition-related contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Business combinations, unaudited supplemental pro forma revenue Business Acquisition, Pro Forma Revenue Benefit from deferred income taxes Deferred Income Tax Expense (Benefit) Charges, related party Related Party Transaction, Other Revenues from Transactions with Related Party Multiemployer Plan, Employer Contribution, Cost Multiemployer Plan, Employer Contribution, Cost Covered Employees and Contributions, Multiemployer Plans [Line Items] Multiemployer Plan [Line Items] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Advances outstanding, related party Due from Affiliates Award Type [Axis] Award Type [Axis] 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] Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Lease Contractual Term [Domain] Lease Contractual Term [Domain] Compensation expense Compensation Expense, Excluding Cost of Good and Service Sold 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 Maximum [Member] High [Member] Maximum [Member] Preferred stock, shares authorized Preferred Stock, Shares Authorized Number of customers Number Of Customers1 Number of customers. Non-Controlling Interests [Member] Noncontrolling Interest [Member] COVID-19 Disclosure Unusual or Infrequent Items, or Both, Disclosure [Text Block] Retained Earnings [Member] Retained Earnings [Member] Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Unrealized gains (losses) on equity investee activity, before tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Consolidated effective tax rate, percent Effective Income Tax Rate Reconciliation, Percent 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] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Stock-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Domain] Award Type [Domain] Interest expense, net Non-recourse financing agreement, discount charge Interest Revenue (Expense), Net Currency translation adjustments, non-amortizing intangible assets Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss) Oil and Gas [Member] Oil And Gas 1 [Member] Engineering, construction and maintenance services for oil and natural gas pipelines and processing facilities for the energy and utilities industries. Multiemployer Plans, Other Multiemployer [Member] Other Postretirement Benefits Plan [Member] Trading Symbol Trading Symbol Revenue, related party Revenue from Related Parties Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Telecommunications Equity Method Investees [Member] Telecommunications Equity Method Investees [Member] Telecommunications Equity Method Investees Line of credit facility, unused facility fee (percentage) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Proceeds from stock-based awards Cash proceeds (in dollars) Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Life insurance assets, carrying amount Cash Surrender Value of Life Insurance Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Pension Plan [Member] Pension Plan [Member] Senior Notes, estimated fair value Notes Payable, Fair Value Disclosure Earnings Per Share Earnings Per Share [Text Block] Equipment [Member] Equipment [Member] Current liabilities: Liabilities, Current [Abstract] Entity Shell Company Entity Shell Company Segments and Related Information [Line Items] Segment Reporting Information [Line Items] 2023 Finance Lease, Liability, to be Paid, Year Two Other stock issuances, net of shares withheld for taxes Stock Issued During Period, Value, Other Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Discount Rate [Member] Measurement Input, Discount Rate [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Foreign Denomination [Member] 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.