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United States UNITED STATES Credit agreement maturity period Line of Credit Facility, Expiration Period Investment Type Investment Type [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Weighted Average Grant-Date Fair Value, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Debt Instrument [Line Items] Debt Instrument [Line Items] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Debt instrument, maturity period Debt Instrument, Term TRS Group Inc [Member] TRS group, Inc. TRS Group, Inc. Shares fully vested, Description Share-Based Compensation Arrangement by Share-Based Payment Award, Description Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Property and equipment, net (including $2,971 and $3,274 Property and equipment of consolidated joint ventures, net) Lessee, Operating Lease, Liability, to be Paid, Year Four 2028 Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Fair Value, Recurring Fair Value, Recurring [Member] Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Summay of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Convertible Debt, Total Net carrying value of notes Convertible Debt Common stock, par value Common Stock, Par or Stated Value Per Share Premium of reported sale price percentage Debt Instrument Convertible Premium Period Percentage Debt instrument convertible premium period percentage. Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Bond hedge termination Bond Hedge Termination Bond hedge termination. Proceeds from partial termination of note hedge and warrants Proceeds from Partial Termination of Note Hedge and Warrants Proceeds from partial termination of note hedge and warrants. Contract retentions Contract Receivable Retainage Assets Liabilities Net Contract receivable retainage assets (Liabilities) net. Intangible Assets Intangible Assets Disclosure [Text Block] Contract with Customer, Liability, Total Contract liabilities Contract with Customer, Liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Taxes Payable, Current, Total Income taxes payable Taxes Payable, Current Tax effect of unwind existing bond hedge Statement of Cash Flows [Abstract] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Credit Derivatives Contract Type [Domain] Long-Term Debt, Fair Value Long-Term Debt, Fair Value Executive compensation Effective Income Tax Rate Reconciliation Executive Compensation Effective income tax rate reconciliation executive compensation. Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Selling, General and Administrative Expense Selling, General and Administrative Expenses [Member] All Entities Entity [Domain] Other Deferred Tax Assets, Other Restricted Award Units Restricted Stock [Member] Acquired Finite Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Equity Components Equity Components [Axis] Entity Address, Address Line One Entity Address, Address Line One Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] Number of Units, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Contributions to ESOP Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP Schedule Of Finite Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Computer Systems and Equipment Computer Equipment [Member] Decrease in operating income Decrease In Operating Income Decrease in operating income. Property Plant And Equipment [Line Items] Property, Plant and Equipment [Line Items] Additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Convertible note converted each amount Convertible Note Converted Each Amount Convertible note converted each amount. Subsequent Event Type [Axis] Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Change in tax status Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Revolving credit facility Line of Credit Facility, Maximum Borrowing Capacity Rest of World Non-US [Member] Number of awards outstanding Number of Units, Unvested, Beginning balance Number of Units, Unvested, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Entity Voluntary Filers Entity Voluntary Filers Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Dilutive effect of warrants Finite-Lived Intangible Asset, Expected Amortization, Year Two 2026 Amendment Flag Amendment Flag Contributions by noncontrolling interests Proceeds from Noncontrolling Interests Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Percent Equity compensation Net Income (Loss) Attributable to Noncontrolling Interest, Total Net income attributable to noncontrolling interests Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Total current income tax expense Current Income Tax Expense (Benefit) Federal Current Federal Tax Expense (Benefit) Convertible Note Hedge And Warrant Transaction Convertible Note Hedge And Warrant Transaction [Member] Convertible note hedge and warrant transaction. Long-term lease liabilities, operating leases Long-term Long-term lease liabilities, operating leases (including $2,203 and $5,132 Long-term lease liabilities, operating leases of consolidated joint ventures) United States Earnings U.S. Federal Domestic Tax Jurisdiction [Member] Debt Instrument, Name Debt Instrument, Name [Domain] Additional paid-in capital Additional Paid in Capital, Common Stock Summary of Adjusted EBITDA Business Segment Information Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] SOFR Benchmark Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Accounts Receivable, Net Receivable [Policy Text Block] Net income attributable to Parsons Corporation Net income attributable to Parsons Corporation Lessee Lease Description [Table] Lessee, Lease, Description [Table] Share issued Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period ESOP contribution expense Employee Stock Ownership Plan (ESOP), Compensation Expense Variable Rate Variable Rate [Domain] 2020 Employee Stock Purchase Plan Two Thousand Twenty Employee Stock Purchase Plan [Member] 2020 Employee Stock Purchase Plan. Pro forma Revenue Business Acquisition, Pro Forma Revenue Schedule of Debt Schedule of Debt [Table Text Block] Equity Component Equity Component [Domain] Statistical Measurement Statistical Measurement [Domain] Decrease in earnings per share diluted Decrease in earnings per share diluted Decrease in earnings per share diluted. Legal Proceedings [Table] Legal Proceedings [Table] Legal Proceedings. Document Financial Statement Error Correction Flag Document Financial Statement Error Correction [Flag] Selected Quarterly Financial Information [Line items] Selected quarterly financial information. Proceeds from Sale of Property, Plant, and Equipment, Total Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Convertible debt inducement Interest Expense, Debt, Total Interest expense Interest Expense, Debt Other Nonoperating Income (Expense), Total Other income (expense), net Other Nonoperating Income (Expense) State Deferred State and Local Income Tax Expense (Benefit) Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Furniture and Equipment Furniture and Fixtures [Member] Treasury Stock Treasury Stock, Common [Member] Disaggregation Of Revenue [Table] Disaggregation of Revenue [Table] Long-term employee incentives Long Term Employee Incentives Long-term employee incentives. Cybersecurity Risk Management Processes Integrated [Flag] Proceeds from Lines of Credit, Total Proceeds from Lines of Credit Proceeds from borrowings under credit agreement Net income Net income including noncontrolling interests Net income including noncontrolling interests Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Receivables from contracts rate Receivables From Contract With Customer Percentage Receivables from contract with customer percentage. Operating cash flows for operating leases Operating Lease, Payments Mutual Funds Mutual Fund [Member] U.S. Federal Government and Agencies US Government Corporations and Agencies Securities [Member] Provision for doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Lease existence of option to terminate Lessee Lease Existence Of Option To Terminate Lessee lease existence of option to terminate. Payables and Accruals [Abstract] Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Other Deferred Tax Liabilities, Other Gross Carrying Amount Finite-Lived Intangible Assets Acquired Percentage change in contract assets and liabilities Contract With Customer Asset Liability Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent Contract with customer asset liability cumulative catchup adjustment to revenue change in measure of progress percent. Accrued expenses and other current liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accrued Expenses And Other Liabilities Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accrued expenses and other liabilities. Bond hedge termination Adjustments To Additional Paid In Capital Bond Hedge Termination Adjustments to additional paid in capital bond hedge termination. Rental expense Operating Lease, Expense Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets (including $14,723 and $11,929 Prepaid expenses and other current assets of consolidated joint ventures) Net operating loss carryforwards, expiration year Deferred Tax Operating Loss Carryforwards Expiration Year Deferred tax operating loss carryforwards expiration year. Schedule of Share Based Compensation Plans Under Equity Securities Authorized for Issuance Schedule Of Share Based Compensation Plans Under Equity Securities Authorized For Issuance [Table Text Block] Schedule of share based compensation plans under equity securities aauthorized for issuance. 2019 Incentive Plan Two Thousand Nineteen Incentive Plan [Member] 2019 Incentive Plan. Comprehensive income attributable to Parsons Corporation, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares, outstanding Common Stock, Shares, Outstanding Finite-Lived Intangible Assets, Major Class Name Finite-Lived Intangible Assets, Major Class Name [Domain] Interest Income (Expense), Net, Total Interest expense, net Interest Income (Expense), Operating Revolving credit facility Line of Credit Facility, Current Borrowing Capacity Schedule of Income Tax Expense (Benefit) Attributable to Income from Continuing Operations Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Weighted Average Amortization Period (in years) Amortization Period (in years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Revenue Benchmark Revenue Benchmark [Member] Repayments of Lines of Credit Repayments of borrowings under credit agreement Euro Currency Rate Eurodollar [Member] Antidilutive Securities Antidilutive Securities [Axis] Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Schedule of Weighted Average Number of Shares Used To Compute Basic and Diluted EPS Schedule of Weighted Average Number of Shares [Table Text Block] Other Segment Items Other segment items. Other segment items Award of damages in the total amount Loss Contingency, Damages Awarded, Value Adjustment to deferred tax asset through retained earnings Adjustment To Deferred Tax Asset Through Retained Earnings Adjustment to deferred tax asset through retained earnings. Unused term loan commitments rate Unused Term Loan Commitments Rate Unused term loan commitments rate. Foreign Deferred Foreign Income Tax Expense (Benefit) Summary of Restricted Stock Unit Activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Liabilities, Noncurrent, Total Noncurrent liabilities Liabilities, Noncurrent Deferred tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Earn out payment due and payable to the selling shareholders, Multiplier Ratio of Selling Shareholders Multiplier Ratio of selling shareholders multiplier. Finite Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Deferred tax assets Accounts Receivable Billed Current Accounts receivable billed current. Entity Interactive Data Current Entity Interactive Data Current Revenues Other Operating Income Accounting Standards Update Accounting Standards Update [Domain] Goodwill [Line Items] Goodwill [Line Items] Weighted Average Grant-Date Fair Value, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Average purchase price Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased Related Party Transactions Related Party Transactions Disclosure [Text Block] Balance Sheet Location Statement of Financial Position Location, Balance [Axis] Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Minimum Statistical Measurement Statistical Measurement [Axis] Finite-Lived Intangible Asset, Expected Amortization, Year Five 2029 Schedule Of Equity Method Investments [Table] Equity Method Investment [Table] Adjusted EBITDA attributable to noncontrolling interests Adjusted E B I T D A Attributable To Noncontrolling Interests Adjusted EBITDA attributable to noncontrolling interests. Adjusted EBITDA attributable to noncontrolling interests Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Cost of Goods and Services Sold, Total Costs Direct cost of contracts Cost of Goods and Services Sold Direct cost of contracts Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Total Employee compensation and benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Operating lease cost Operating Lease, Cost Debt instrument, payment terms Debt Instrument, Payment Terms Assets, Fair Value Disclosure, Total Assets, fair value disclosure Assets, Fair Value Disclosure Convertible Senior Notes Convertible Debt [Member] Related Party Related and Nonrelated Parties [Domain] Total lease cost Lease, Cost Number of business day period Debt Instrument Convertible Business Period Debt instrument convertible business period. Summary of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Operating cash flows for finance leases Finance Lease, Interest Payment on Liability Number of customers representing more than 10% of accounts receivable Number Of Customers Representing Ten Percent Or More Of Accounts Receivable Number of customers representing ten percent or more of accounts receivable. Finite Lived Intangible Assets Acquired As Part Of Business Combination [Table] Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Change In Contract With Customer Assets1 Change in contract assets Change in contract with customer assets. US North Region [Member] Infrastructure - North America Finite-Lived Intangible Assets, Gross, Total Reductions to gross carrying amount Gross Carrying Amount Finite-Lived Intangible Assets, Gross Payments to Acquire Businesses, Net of Cash Acquired, Total Payments for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Weighted Average Grant-Date Fair Value, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Convertible Senior Notes Due Two Thousand Twenty Nine [Member] Convertible Senior Notes Due Two Thousand Twenty Nine. Convertible Senior Notes due 2029 Decrease in uncertain tax positions within twelve months Decrease in Unrecognized Tax Benefits is Reasonably Possible Foreign Foreign Earnings Foreign Tax Jurisdiction [Member] Loss Contingency, Nature Loss Contingency, Nature [Domain] Increase (decrease) in direct costs of contracts Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price Effect of exchange rate changes Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Net deferred tax asset Deferred Tax Assets, Net Employee benefits Accrued Employee Benefits, Current Measurement Basis [Axis] Threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Income Statement Location Statement of Income Location, Balance [Axis] Cash and Cash Equivalents [Axis] Total assets Assets Contract with Customer, Basis of Pricing Contract with Customer, Basis of Pricing [Domain] Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Debt instrument convertible notes additional paid in capital Debt Instrument Convertible Notes Additional Paid In Capital Debt instrument convertible notes additional paid in capital. Foreign Current Foreign Tax Expense (Benefit) ESOP Employee Stock Ownership Plan (ESOP), Policy [Policy Text Block] Deferred Tax Liabilities, Gross, Total Total deferred tax liabilities Deferred Tax Liabilities, Gross Number of Units, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Business Acquisition [Line Items] Business Acquisition [Line Items] Net distributions from (contributions to) unconsolidated joint ventures Distributions From Contributions To Equity Method Investment Distributions from (contributions to) equity method investment. New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Prior Year Presentation Revision of Prior Period, Adjustment [Member] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Equity in losses (earnings) of unconsolidated joint ventures Total equity in (losses) earnings of unconsolidated joint ventures Income (Loss) from Equity Method Investments Equity in earnings (losses) of unconsolidated joint ventures Equity in (losses) earnings of unconsolidated joint ventures Segments Segments [Axis] Auditor Location Auditor Location Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Number of Units, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Tax Cuts and Jobs Act of 2017 Tax Cuts And Jobs Act [Member] Tax Cuts and Jobs Act. Finance Lease, Liability, to be Paid, Year Two 2026 Balance at beginning of period Balance at end of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Credit Derivatives Contract Type [Axis] Debt Amount Debt amount Debt Instrument, Face Amount Pension adjustments, net Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total Pension adjustments, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Accounting Standards Update 2020-06 ASC 2020-06 Accounting Standards Update 2020-06 [Member] Depreciation, Total Depreciation expense Depreciation Summary of Changes in Revenue Summary Of Changes In Revenues [Table Text Block] Summary of changes in revenues. Revision of Prior Period Revision of Prior Period [Domain] Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Private Placement Private Placement [Member] Equity-Based Compensation Share-Based Payment Arrangement [Text Block] Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Construction in Progress Construction in Progress [Member] State Current State and Local Tax Expense (Benefit) Valuation And Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Transaction costs Effective Income Tax Rate Reconciliation Transaction Costs Effective income tax rate reconciliation, transaction costs. Operating leases Operating Lease, Weighted Average Discount Rate, Percent Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Debt Instrument, Increase (Decrease), Net, Total Increase in term loan Debt Instrument, Increase (Decrease), Net Fair Value Disclosures [Abstract] Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Entity Public Float Entity Public Float Schedule of Supplemental Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Issuance of equity securities, net of retirements Stock Issued During Period, Value, New Issues Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Equity Compensation Plans Not Approved By Security Holders Equity Compensation Plans Not Approved By Security Holders [Member] Equity compensation plans not approved by security holders. Summary of Restricted Stock Outstanding Schedule Of Share Based Compensation Restricted Stock Outstanding Activity Table [Text Block] Schedule of share based compensation restricted stock outstanding activity. Amount paid by relator to acquire vehicles for contractor defendant to perform security services Amount Paid To Acquire Vehicles For Contractor Defendant To Perform Security Services Amount paid to acquire vehicles for contractor defendant to perform security services. Accounting Standards Update 2023-09 [Member] ASU 2023-09 Lessee Lease Description [Line Items] Lessee, Lease, Description [Line Items] Current liabilities: Liabilities, Current [Abstract] Additional cash tax liability Additional Cash Tax Liability Related To Tax Cuts And Jobs Act Of2017 Additional cash tax liability. Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Foreign tax credits, valuation allowance Tax Credit Carryforward, Valuation Allowance Distributions to noncontrolling interests Payments to Noncontrolling Interests Accounts Receivable Accounts Receivable [Member] Income Taxes Paid, Net, Total Income taxes (net of refunds) Income Taxes Paid, Net Cash and Cash Equivalents Cash and Cash Equivalents [Member] Document Type Document Type Accounting Standards Update Accounting Standards Update [Axis] Weighted Average Remaining Lease Term: Weighted Average Remaining Lease Term [Abstract] Weighted average remaining lease term. Average price paid per share Stock Repurchase Average Price Paid Per Share Stock repurchase average price paid per share. Noncontrolling interests Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount Total shares retired Stock Repurchased and Retired During Period, Shares Title of each class Title of 12(b) Security Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents (including $202,121 and $128,761 Cash of consolidated joint ventures) Adjustments to Shareholders Equity Relating to Reversal of Tax Benefit Adjustments to shareholders equity relating to reversal of tax benefit Adjustments to shareholders equity relating to reversal of tax benefit Percentage of per-share market value limit for share purchases Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date Tax cost of foreign operations, net of credits Effective Income Tax Rate Reconciliation Tax Cost Of Foreign Operations Net Of Credits Effective income tax rate reconciliation tax cost of foreign operations, net of credits. Balance Sheet Location Statement of Financial Position Location, Balance [Domain] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Lessee, Operating Lease, Liability, to be Paid, Year Five 2029 Summary of Lease Costs Lease, Cost [Table Text Block] Cybersecurity Risk Management, Strategy, and Governance [Line Items] Statement of Stockholders' Equity [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Long-Term Debt, Excluding Current Maturities, Total Long-term debt Long-Term Debt, Excluding Current Maturities Stock-based compensation expense, tax benefits Share-Based Payment Arrangement, Expense, Tax Benefit Transaction-related costs Transaction Related Costs Transaction related costs. Summary of Changes in Carrying Value of Goodwill by Reporting Segment Schedule of Goodwill [Table Text Block] Direct Costs Write-Down Direct Costs Write Down [Member] Direct costs write-down. Impairment of contract assets Capitalized Contract Cost, Impairment Loss Buildings and Leasehold Improvements Building and Building Improvements [Member] Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property and equipment, gross Property, Plant and Equipment, Gross Senior Note, Series D Series D Senior Note [Member] Series D senior note. Subsequent Event Type [Domain] Percentage change in contract liabilities Contract With Customer Liability Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent Contract with customer liability cumulative catchup adjustment to revenue change in measure of progress percent. Lease liabilities: Lease Liabilities [Abstract] Lease liabilities. Leases Lessee, Leases [Policy Text Block] Estimate of Fair Value Measurement [Member] Fair Value Summary of Changes in Contract Assets and Contract Liabilities Summary Of Changes In Contract Assets And Contract Liabilities Table [Text Block] Summary of changes in contract assets and contract liabilities. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Business combination, recognized identifiable assets acquired and liabilities assumed, other assets. Other assets SEC Schedule, 12-09, Valuation Allowances and Reserves Type SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] State taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Leases Lease Agreements [Member] Schedule of Repurchase Program Class of Treasury Stock [Table Text Block] Exercise price of warrants Class of Warrant or Right, Exercise Price of Warrants or Rights Proceeds from delayed draw term loan Proceeds from Issuance of Unsecured Debt Time-and-Materials Time-and-Materials Contract [Member] Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Transaction costs Income Tax Reconciliation Transaction Costs Income tax reconciliation transaction costs. Sale of Stock Sale of Stock [Axis] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investments Investments [Domain] Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent Revision of prior estimated tax expense Repurchases of common stock Payments for Repurchase of Common Stock Stock repurchase program commencement date Stock Repurchase Program Commencement Date Stock repurchase program commencement date. Net operating loss carryforwards, not subject to expiration Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration Noncontrolling interests Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Revenues Revenue Total revenues Statement of Comprehensive Income [Abstract] Income Taxes Income Tax Disclosure [Text Block] Decreases—prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Computation of Income Tax Expense (Benefit) Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Allowance for Doubtful Accounts SEC Schedule, 12-09, Allowance, Credit Loss [Member] Cybersecurity Risk Management, Strategy, and Governance [Abstract] Summary of Remaining Unsatisfied Performance Obligations Expect to Satisfy Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Selling, General and Administrative Expense, Total Selling, general and administrative expenses Selling, General and Administrative Expense Selling, general and administrative expenses Credit Facility Credit Facility [Domain] Accounting Standards Update 2023-07 [Member] ASU 2023-07 Lease existence of option to extend Lessee Lease Existence Of Option To Extend Lessee lease existence of option to extend. Finite-Lived Intangible Assets, Net, Ending Balance Finite-Lived Intangible Assets, Net, Beginning Balance Net Carrying Amount Finite-Lived Intangible Assets, Net Trade Names Trade Names [Member] Trade name Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Debt instrument, frequency of periodic payment Debt Instrument, Frequency of Periodic Payment Schedule of Intangible Assets Value on Purchase Price Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Other accrued expenses Other Accrued Liabilities, Current Increase (Decrease) in Accounts Payable, Total Accounts payable Increase (Decrease) in Accounts Payable Entity Address, Address Line Two Lessee lease option to extend. Lease option to extend Lessee Lease Option To Extend Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Deferred Debt Issuance Cost, Writeoff Acceleration charge of amortization of debt issuance costs Stock Repurchased and Retired During Period, Value Stock repurchase value Document Period End Date Document Period End Date Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Total income tax expense Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Denominator for Basic and Diluted EPS: Denominator For Basics And Diluted EPS [Abstract] Denominator for basic and diluted EPS. Description Of Operations Disclosure [Abstract] Description of operations disclosure. Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Antidilutive securities excluded from computation of earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Reported Value Measurement [Member] Carrying Value Significant Segment Expense Significant segment expense. Selling, general and administrative expenses ASU 2021-08 Accounting Standards Update 2021-08 [Member] APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Goodwill Goodwill Disclosure [Text Block] Weighted Average Discount Rate: Weighted Average Discount Rate [Abstract] Weighted average discount rate. Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Number Of Customers Representing Twenty Percent Or More Of Revenues Number of customers representing twenty percent or more of revenues. Number of customers representing more than 20% of revenue Income tax expense Total income tax expense Income Tax Expense (Benefit) Income Tax Authority, Name Income Tax Authority, Name [Axis] Amount relating to claims assigned Amount Relating To Claims Assigned Amount relating to claims assigned. Loss (gain) on disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment, Total (Gain) loss on disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Earnout liability. Earnout Liability Earnout Liability [Member] Trading Symbol(s) Trading Symbol Business Combinations [Abstract] Variable Rate Variable Rate [Axis] Equity, Attributable to Parent, Ending Balance Equity, Attributable to Parent, Beginning Balance Total joint venture equity Total Parsons Corporation shareholders' equity Equity, Attributable to Parent Reimbursable cost incurred Reimbursable Cost Incurred Reimbursable cost incurred. SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Adjusted EBITDA attributable to Parsons Corporation Reconciliation From Net Income To Adjusted E B I T D A [Abstract] Reconciliation from net income to adjusted EBITDA. Payments for purchase of bond hedges Payments for Hedge, Financing Activities Federal business credits Income Tax Reconciliation Federal Business Credits Income tax reconciliation federal business credits. Percentage of convertible senior notes repurchased at cash Percentage Of Convertible Senior Notes Repurchased At Cash Percentage of convertible senior notes repurchased at cash. Total deferred tax assets Deferred Tax Assets, Gross Investments in unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Debt Instrument, Periodic Payment, Total Interest payments Debt Instrument, Periodic Payment Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Infrastructure - Europe, Middle East and Africa Europe, Middle East and Africa EMEA [Member] Total other long-term liabilities Other long-term liabilities Other Liabilities, Noncurrent Debt Instrument, conversion price Debt Instrument, Convertible, Conversion Price Cash paid to acquire Cash paid at closing Payments to Acquire Businesses, Gross Acquired contract liabilities Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Restricted Stock Units Restricted Stock Units (RSUs) [Member] Related Party Transactions [Abstract] Other Liabilities Disclosure [Abstract] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Cybersecurity Risk Management, Strategy, and Governance [Table] Lease term of contract Lessee Lease Term Of Contract Lessee lease term of contract. Goodwill, Total Goodwill Beginning Balance Ending Balance Goodwill Change in accounting principle, accounting standards update, adopted Change in Accounting Principle, Accounting Standards Update, Adopted [true false] Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Compensation cost related to non-vested awards not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Summary Of Finanial Statement Impact From Revisions In Estimates [Table Text Block] Summary of finanial statement impact from revisions in estimates. Summary of Finanial Statement Impact from Revisions in Estimates Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Description of Operations Nature of Operations [Text Block] Contribution to 401 (k) plan Defined Contribution Plan, Employer Discretionary Contribution Amount Summary of Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Payments for acquired warrants Payments for Repurchase of Warrants Deferred Income Tax Expense (Benefit) Total deferred tax benefit Deferred taxes Restricted Stock Units (Service and Performance Condition) Service And Performance Based Restricted Stock Units R S U [Member] Service and performance based restricted stock units RSU. Geographical Geographical [Axis] Finance Lease, Liability, to be Paid, Year Three 2027 Leases [Abstract] Gain (Loss) on Repurchase of Debt Instrument Convertible debt repurchase loss Convertible debt repurchase loss Income Taxes [Table] Income Taxes [Table] Income taxes. Use of Estimates Use of Estimates, Policy [Policy Text Block] Subsegments Subsegments [Axis] Assets, Noncurrent, Total Noncurrent assets Assets, Noncurrent Concentration risk percentage Concentration Risk, Percentage Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Related Party Related Party [Member] Reversal of Tax Benefit of Loss On Extinguishment of Debt Reversal of tax benefit of loss on extinguishment of debt. Reversal of tax benefit of loss on extinguishment of debt Right-of-use assets Deferred Tax Liabilities, Leasing Arrangements Self-insurance liability Accrued Insurance, Current Credit agreement date Line of Credit Facility, Initiation Date Schedule Of Business Acquisitions By Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Summary of Contract Assets and Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Executive compensation Income Tax Reconciliation Executive Compensation Income tax reconciliation executive compensation. Security Exchange Name Name of each exchange on which registered Pro forma Net Income including noncontrolling interests Business Acquisition Pro Forma Net Income Loss Including Portion Attributable To Noncontrolling Interest Business acquisition, pro forma net income (loss), including portion attributable to noncontrolling interest. Revision of prior estimated tax expense Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Revenue impact, net Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Deferred Tax Assets, Tax Credit Carryforwards, Total Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Business Acquisition, Acquiree Business Acquisition, Acquiree [Domain] Unbilled Unbilled Receivables, Current Taxes paid on vested stock Payments For Taxes Paid On Vested Stock Payments for taxes paid on vested stock. Restricted Cash and Investments Restricted Cash And Investments Policy Policy [Text Block] Restricted cash and investments. Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Loss Contingency Nature Loss Contingency Nature [Axis] Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Legal Entity: Legal Entity [Axis] Fair Value Fair Value Disclosures [Text Block] Lessee, Operating Lease, Liability, to be Paid, Year Three 2027 Subsequent Event [Member] Subsequent Event Maximum Maximum [Member] Total liabilities and shareholders' equity Liabilities and Equity Schedule of Supplemental Balance Sheet and Other Information Related to Leases Schedule Of Balance Sheet Information Related To Leases Table [Text Block] Schedule of balance sheet information related to leases. Gain (Loss) on Extinguishment of Debt Gain (Loss) on Extinguishment of Debt, Total Loss on extinguishment Loss on extinguishment of debt Acquired contract assets Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination Right of use assets, operating leases Right-of-use assets Right of use assets, operating leases (including $5,726 and $9,885 Right of use assets, operating leases of consolidated joint ventures) Cash paid during the year for Supplemental Cash Flow Information [Abstract] Stock-based compensation expense, tax benefit realized related to awards vested Employee Service Share Based Compensation Tax Benefit Realized From Vesting Of Awards Employee service share based compensation tax benefit realized from vesting of awards. Target amount of earnout revenue Target Amount of Earnout Revenue Target amount of earnout revenue. Retirement Benefits [Abstract] Diluted earnings (loss) per share Diluted loss per share Earnings Per Share, Diluted, Total Diluted earnings per share Earn out revenue target, amount Payment For Earn Out Revenue Target Payment for earn out revenue target. Project cost accruals Project Cost Accruals Current Project cost accruals current. Equity Compensation Plans Approved By Security Holders Equity Compensation Plans Approved By Security Holders [Member] Equity compensation plans approved by security holders. Income Tax Uncertainties [Abstract] BlackHorse Solutions, Inc. Black Horse Solutions Inc [Member] BlackHorse Solutions, Inc. Total liabilities Liabilities Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Assets, Current Total current assets Current assets Inducement expense Inducement Expenses Inducement expenses. Inducement expenses Inducement expense Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Beginning of year End of year Unrecognized Tax Benefits Tax credit use amortization term Deferred Tax Credits Limitation Of Use Amortization Term Deferred tax credits limitation of use amortization term. Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Shares fully vested after credited service Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Foreign-Derived Intangible Income Effective Income Tax Rate Reconciliation, FDII, Percent Foreign-Derived Intangible Income Increase in deferred tax assets revenue and cost Increase Decrease Of Deferred Tax Assets Revenue And Cost Increase (decrease) of deferred tax assets revenue and cost. Additional deferred tax liability related to capitalized debt issuance costs Additional Deferred Tax Liability Related To Capitalized Debt Issuance Cost Additional deferred tax liability related to Capitalized debt issuance cost. Entity Filer Category Entity Filer Category Property, Plant and Equipment [Abstract] Total shareholders' equity Beginning balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Revenue and cost recognition Deferred Tax Assets Revenue And Cost Recognition Deferred tax assets revenue and cost recognition. Summary of Stock Issuance Activity Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Total Finite Lived Intangible Assets Amortizable Amount Finite lived intangible assets amortizable amount. Effective Income Tax Rate Reconciliation, Tax Contingency, Percent, Total Change in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Schedule of Other Long-term Liabilities Other Noncurrent Liabilities [Table Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Borrowed under credit agreement to partially fund the acquisition Business Combination, Consideration Transferred, Liabilities Incurred Restricted Cash and Investments, Current, Total Restricted cash and investments Restricted Cash and Investments, Current Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Noncontrolling Interests Noncontrolling Interest [Member] Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Income tax payable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Income Tax Payable Business combination recognized identifiable assets acquired and liabilities assumed income tax payable. Share-Based Payment Arrangement, Noncash Expense, Total Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Accrued expenses and other current liabilities Increase Decrease In Accrued Expenses And Other Current Liabilities Increase (decrease) in accrued expenses and other current liabilities. Related Party Related and Nonrelated Parties [Axis] Transaction fees and other third-party offering expenses Debt Instrument, Fee Amount Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Reclassification of equity component of debt issuance costs to liabilities Reclassification Of Equity Component Of Debt Issuance Costs To Liabilities Reclassification of equity component of debt issuance costs to liabilities. Foreign Exchange Goodwill, Foreign Currency Translation Gain (Loss) Convertible principal amount Debt Instrument Convertible Principal Amount Debt instrument convertible principal amount. Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Project and non-project reserves Deferred Tax Assets Tax Deferred Expense Project And Non Project Reserves Deferred tax assets tax deferred expense project and non-project reserves. Entity Registrant Name Entity Registrant Name Business Combination, Contingent Consideration, Liability Business Combination, Contingent Consideration, Liability, Total Estimated fair value of contingent consideration Finance leases Finance Lease, Weighted Average Remaining Lease Term Retirement and Other Benefit Plans Compensation and Employee Benefit Plans [Text Block] Quarterly Information - Unaudited Quarterly Financial Information [Text Block] Contributions Minority Interest Increase Decrease From Contributions To Noncontrolling Interest Holders Minority interest increase (decrease) from contributions to noncontrolling interest holders. Intangible and other assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible And Other Assets Business combination recognized identifiable assets acquired and liabilities assumed intangible and other assets. Number of reportable segments Number of Reportable Segments Change in accounting principle, accounting standards update, early adoption Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Earnings Per Share Earnings Per Share [Text Block] Senior Note, Series A Senior Note, Series A Series A Senior Note [Member] Series A senior note. Maturity Date Debt Instrument, Maturity Date Entity Emerging Growth Company Entity Emerging Growth Company Percentage of principal amount to redeem convertible senior notes Percentage Of Principal Amount To Redeem Convertible Senior Notes Percentage of principal amount to redeem convertible senior notes. Equity Method Investments and Joint Ventures [Abstract] Weighted Average Number of Shares Outstanding, Basic, Total Basic weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Basic Schedule II - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Finance lease obligations Other long-term liabilities Finance Lease, Liability, Noncurrent Increases—prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Schedule Of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Purchase of convertible senior notes Repayments of Convertible Debt Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Gain on change in fair value of contingent consideration Fair value of contingent consideration to be achieved Common stock, shares authorized Common Stock, Shares Authorized Useful life (years) Property, Plant and Equipment, Useful Life Sublease income Sublease Income Purchase price paid for shares sold Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Purchase of bond hedges and sale of warrants Net Cost Of Purchase Of Bond Hedges And Sale Of Warrants Net cost of purchase of bond hedges and sale of warrants. Concentration Risk Type Concentration Risk Type [Axis] Interest on lease liabilities Finance Lease, Interest Expense Equity Method Investment, Nonconsolidated Investee Equity Method Investment, Nonconsolidated Investee [Axis] Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Level 1 Fair Value, Inputs, Level 1 [Member] Cost-Plus Cost Plus [Member] Cost plus. Debt Disclosure [Abstract] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Amortization expense of intangible assets Amortization of intangible assets Amortization of Intangible Assets Earnings per Share Earnings Per Share, Policy [Policy Text Block] Reclassification of equity component of convertible senior notes to liabilities Reclassification Of Equity Component Of Convertible Senior Notes To Liabilities Reclassification of equity component of convertible senior notes to liabilities. Schedule of Unvested Share Activity Schedule of Nonvested Share Activity [Table Text Block] Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Revenue Recognition Revenue [Policy Text Block] Share-Based Payment Arrangement [Abstract] Total cash settled awards Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Share-Based Liabilities Paid Contract retentions, not expected to be paid in next 12 months Contract Receivable Retainage Asset Liabilities Net Due After One Year Contract receivable retainage asset (liabilities) net, due after one year. Subsegments Subsegments [Domain] Schedule of Amount Paid for Cash Settled Awards by Award Type Schedule Of Amount Paid For Cash Settled Awards Table [Text Block] Schedule of amount paid for cash settled awards. Proceeds from issuance of warrants Proceeds from Issuance of Warrants Goodwill impairments Goodwill, Impairment Loss Cybersecurity Risk Role of Management [Text Block] Accounting Policies [Abstract] Restructuring expense Restructuring Income Expense Restructuring income (expense). Measurement period, percentage Debt Instrument Convertible Measurement Period Percentage Debt instrument convertible measurement period percentage. Increase in shareholders equity relating to reversal of loss on extinguishment of debt and inducement expenses Increase Decrease in Shareholders Equity Relating to Reversal of Loss on Extinguishment of Debt and Inducement Expenses Increase decrease in shareholders equity relating to reversal of loss on extinguishment of debt and inducement expenses. Income Tax Disclosure [Abstract] Change in contract liabilities Change In Contract With Customer Liability1 Change in contract with customer liability. Increases—current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Diluted net income attributable to Parsons Corporation Net Income (Loss) Attributable to Parent, Diluted Construction Equipment Construction Equipment [Member] Construction equipment. Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Statement [Table] Statement [Table] Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Selected Quarterly Financial Information [Table] Selected quarterly financial information. Schedule of Gross Amount and Accumulated Amortization of Intangible Assets Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Braxton Braxton Science & Technology Group Braxton Science Technology Group [Member] Braxton Science & Technology Group. Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Comprehensive income attributable to noncontrolling interests, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Subsequent Event [Table] Summary of Revenues and Property and Equipment, Net by Geographic Area Summary Of Revenues And Property And Equipment Net By Geographic Area Table [Text Block] Summary of revenues and property and equipment, net by geographic area. Entity File Number Securities Act File Number Segments Information Segment Reporting Disclosure [Text Block] Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Revenue from Contract with Customer [Abstract] Earnings per share: Earnings Per Share [Abstract] Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract assets (including $7,906 and $11,096 Contract assets of consolidated joint ventures) Interest Receivable pre-judgment interest Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Self-Insurance Self Insurance Reserve [Policy Text Block] State taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Federal business credits Effective Income Tax Rate Reconciliation Federal Business Credits Effective income tax rate reconciliation federal business credits. Treasury Stock Treasury Stock Policy Policy [Text Block] Treasury stock. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Income Taxes Business combination, recognized identifiable assets acquired and liabilities assumed, deferred income taxes. Deferred income taxes Statement of Financial Position [Abstract] Summary of Financial Information for Unconsolidated Joint Ventures Equity Method Investments [Table Text Block] Interest Expense, Total Interest expense Interest Expense, Operating and Nonoperating Operating loss Operating income (loss) Operating income Operating Income Net contract assets (liabilities) Contract With Customer Asset Liability Net Contract with customer asset and liabilities net. Entity Shell Company Entity Shell Company Contributions of treasury stock to ESOP Stock Issued During Period, Value, Employee Stock Ownership Plan Income Taxes [Line Items] Income Taxes [Line Items] Income taxes. Convertible senior notes effective interest rate Debt Instrument, Interest Rate, Effective Percentage Entity Tax Identification Number Entity Tax Identification Number Assets Assets [Abstract] Restricted Stock Units (Service Condition) Service Based Restricted Stock Units R S U [Member] Service based restricted stock units RSU. Contract assets, net claims recovery estimates Contracts Receivable, Claims and Uncertain Amounts, Total Contracts Receivable, Claims and Uncertain Amounts Entity Current Reporting Status Entity Current Reporting Status Finance Lease, Liability, to be Paid, Year Four 2028 Proceeds from Issuance of Convertible Preferred Stock Proceeds from issuance of convertible notes due 2029 Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Long-Term Debt, Type Long-Term Debt, Type [Axis] Subsequent Events [Abstract] Valuation Allowance on Deferred Tax Assets SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Contract Assets and Contract Liabilities Revenue from Contract with Customer [Policy Text Block] Contract liabilities Increase (Decrease) in Contract with Customer, Liability Geographical Geographical [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Equity Method Investment, Amount Sold, Total Write-down on unconsolidated joint venture Equity Method Investment, Amount Sold Return of investments in unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Change in accounting principle, accounting standards update, adoption date Change in Accounting Principle, Accounting Standards Update, Adoption Date Bond hedge term Bond Hedge Term Bond hedge term. Deferred tax liability reversed Reversal Of Deferred Tax Liability Reversal of deferred tax liability. Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Adjusted EBITDA attributable to Parsons Corporation Adjusted E B I T D A Attributable To Parent Adjusted EBITDA attributable to parent. Number of Units, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures Legal Proceedings [Line Items] Legal Proceedings [Line Items] Legal Proceedings. Accumulated Amortization Reductions to accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Number of customers representing more than 10% of revenue Number Of Customers Representing Ten Percent Or More Of Revenues Number of customers representing ten percent or more of revenues. Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Beginning of year End of year Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Federal Solutions Federal Solution Segment Federal Solution Segment [Member] Federal Solution Segment. Effective Income Tax Rate Reconciliation, FDII, Amount Foreign-derived intangible income deduction Number of claims outstanding Loss Contingency Number Of Claims Loss contingency, number of claims. Business Acquisition Business Acquisition [Axis] Sealing Technologies, Inc. Sealing Technologies Inc [Member] Sealing technologies inc. Foreign tax credit carryforwards Tax Credit Carryforward, Amount City Area Code City Area Code Debt, Long-Term and Short-Term, Combined Amount Total Debt Letters of credit outstanding amount Letters of Credit Outstanding, Amount Total current liabilities Current liabilities Liabilities, Current Goodwill deductible for tax purposes Business Acquisition, Goodwill, Expected Tax Deductible Amount RSU and PSU Restricted Stock Units And Performance Share Unit Awards [Member] Restricted stock units and performance share unit awards. Percentage change in contract assets Contract With Customer Asset Cumulative Catchup Adjustment To Revenue Change In Measure Of Progress Percent Contract with customer asset cumulative catchup adjustment to revenue change in measure of progress percent. Proceeds from issuance and sale of debt Proceeds from Debt, Net of Issuance Costs Tax at federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. corporate tax rate Operating lease not yet commenced expense Operating Lease Not Yet Commenced Expense Operating lease not yet commenced expense. Shares of common stock repurchased Share Repurchase Program, Authorized, Number of Shares Organization, Consolidation and Presentation of Financial Statements [Abstract] Local Phone Number Local Phone Number Redemption of warrants Redemption Of Warrants Redemption Of Warrants Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Lease liabilities Deferred Tax Assets Lease Liability Deferred tax assets lease liability. Defined benefit pension plan, net assets position Assets for Plan Benefits, Defined Benefit Plan Xator Corporation Xator Corporation [Member] Xator corporation member. Change in contract assets and liabilities Change In Contract With Customer Assets And Liabilities Net Change in contract with customer assets and liabilities net. Income Tax Authority Income Tax Jurisdiction [Axis] Amount attributable to contractual and indemnification claims Amount Attributable To Contractual And Indemnification Claims Amount attributable to contractual and indemnification claims Echo Ridge LLC Echo Ridge L L C [Member] Echo Ridge LLC. Number of shares issuable upon conversion Debt Instrument Number Of Shares Issuable Upon Conversion Debt instrument number of shares issuable upon conversion. Income Taxes Income Tax, Policy [Policy Text Block] Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of Income from Operations Before Income Taxes Commitments and Contingencies Disclosure [Abstract] Convertible Senior Notes Due 2025 Note Hedge And Warrants [Member] Convertible senior notes due 2025 note hedge and warrants. Convertible Senior Notes Due 2025 Note Hedge And Warrants Treasury Stock, Value, Total Treasury Stock, Value Treasury stock, 39,880,875 shares at cost Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Accrued Expenses And Other Current Liabilities Accrued expenses and other current liabilities. Accrued expenses and other current liabilities (including $198,797 and $145,040 Accrued expenses and other current liabilities of consolidated joint ventures) Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Debt Issuance Costs, Net, Total Debt issuance costs incurred Debt Issuance Costs, Net Components of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Reversal of Loss on Extinguishment of Debt Reversal of loss on extinguishment of debt. Reversal of loss on extinguishment of debt Current Short-term lease liabilities, operating leases Short-term lease liabilities, operating leases (including $3,522 and $4,753 Short-term lease liabilities, operating leases of consolidated joint ventures) Developed Technologies Developed Technology Rights [Member] Developed technology Right-of-use assets obtained in exchange for new finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Cost of convertible note hedge transaction Cost Of Convertible Note Hedge Transaction Cost of convertible note hedge transactions. In Process Research and Development In Process Research and Development [Member] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Foreign currency translation adjustment, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Income Tax Authority Income Tax Jurisdiction [Domain] Interest rate Debt Instrument, Interest Rate, Stated Percentage Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Summary of Revenues by Business Lines Revenue from External Customers by Products and Services [Table Text Block] Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Net Income Available to Shareholders to Compute Basic and Diluted EPS Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] Document Transition Report Document Transition Report Loss contingency sought value, civil penalty for each alleged violation of Act Loss Contingency Sought Value Civil Penalty For Each Alleged Violation Of Act Loss contingency sought value, civil penalty for each alleged violation of Act. Joint Ventures Consolidated Joint Ventures Consolidated Joint Ventures [Member] Consolidated joint ventures. Authorized shares of common stock value Number of authorized shares of common stock value Share Repurchase Program, Authorized, Amount 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two SEC Schedule, 12-09, Valuation Allowances and Reserves SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Convertible Senior Notes Due Two Thousand Twenty Five [Member] Convertible Senior Notes Due Two Thousand Twenty Five. Convertible Senior Notes Due 2025 Reduction in Quarterly Cap Value on Stock Repurchased Reduction in quarterly cap value on stock repurchased. Reduction in quarterly cap value on stock repurchased Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Schedule Of Employee Stock Ownership Plan E S O P Disclosures [Table] Employee Stock Ownership Plan (ESOP) [Table] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Deferred tax assets Deferred Income Tax Assets, Net Auditor Firm ID Auditor Firm ID Minimum Minimum [Member] Minimum [Member] Earnings per share: Earnings Per Share Reconciliation [Abstract] Insurance accruals Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Self Insurance Common Stock Common Stock [Member] Accounting Standards Update 2024-03 [Member] Accounting standards update 2024-03.3 ASU 2024-03 Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Investment, Name Investment, Name [Axis] Number of Securities to be Issued upon Exercise of Outstanding Options, Warrants and Rights Number Of Shares To Be Issued Upon Exercise Of Outstanding Options, Warrants And Rights Number of shares to be issued upon exercise of outstanding options, warrants and rights. Number of securities to be issued upon exercise of outstanding options, warrants and rights. Weighted Average Grant-Date Fair Value, Unvested, Beginning balance Weighted Average Grant-Date Fair Value, Unvested, Ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Additional Paid-in Capital Additional Paid-in Capital [Member] Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Adjustments to reconcile net income to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Other Operating Income, Related Party [Extensible Enumeration] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Income Statement Location Statement of Income Location, Balance [Domain] Lessee, Operating Lease, Liability, to be Paid, Year One 2025 Total accounts receivable, gross Accounts Receivable, before Allowance for Credit Loss, Current Other noncurrent assets Other Assets, Noncurrent Capped Call Transaction [Member] Capped call transaction. Capped Call Transaction Return on investments in unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution Joint Ventures Joint Ventures [Member] Joint ventures. Transaction costs paid in connection with convertible notes issuance Payment Of Convertible Notes Issuance Transaction Costs Payment of convertible notes issuance transaction costs. Segments Segments [Domain] Critical Infrastructure Critical Infrastructure Segment [Member] Critical Infrastructure Segment. 2022 Delayed draw term loan. 2022 Delayed Draw Term Loan Two Thousand Twenty Two Delayed Draw Term Loan [Member] Delayed draw term loan Senior Note, Series B Series B Senior Note [Member] Series B senior note. Middle East Middle East [Member] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Decrease in net income net of tax Decrease in net income net of tax Decrease in net income net of tax. Goodwill And Intangible Assets Disclosure [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Revision of Prior Period, Accounting Standards Update, Adjustment Revision of Prior Period, Accounting Standards Update, Adjustment [Member] Disaggregation Of Revenue [Line Items] Disaggregation of Revenue [Line Items] Acquisitions Goodwill, Acquired During Period U.S. States and Foreign State And Local Jurisdiction And Foreign [Member] State and local jurisdiction and foreign. Operating Leases: Operating Leases [Abstract] Operating lease. Equity, Attributable to Noncontrolling Interest, Ending Balance Equity, Attributable to Noncontrolling Interest, Beginning Balance Equity, Attributable to Noncontrolling Interest, Total Noncontrolling interests Equity, Attributable to Noncontrolling Interest Basis of Presentation and Principles of Consolidation Basis of Accounting, Policy [Policy Text Block] Finite-Lived Intangible Asset, Expected Amortization, Year One 2025 BCC Engineering, LLC [Member] BCC Engineering, LLC. BCC Engineering, LLC Debt Issuance Costs, Noncurrent, Net, Total Long-term debt issuance costs Debt Issuance Costs, Noncurrent, Net Customer Relationships Customer Relationships [Member] Accrued expenses and other current liabilities Finance Lease, Liability, Current Debt liability Debt Instrument Convertible Debt Liability Debt instrument convertible debt liability. Common Stock, Value, Issued Common stock, $1 par value; authorized 1,000,000,000 shares; 146,656,225 and 146,341,363 shares issued; 52,657,447 and 45,960,122 public shares outstanding; 54,117,904 and 59,879,857 ESOP shares outstanding Interest income Investment Income, Interest Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Schedule of Estimated Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Convertible senior notes if-converted method interest adjustment Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Backlog Order or Production Backlog [Member] Infrastructure - North America North America North America [Member] Schedule of Consolidated Balance Sheet Related to Services Provided to Unconsolidated Joint Ventures Schedule Of Consolidated Balance Sheet Related To Unconsolidated Joint Ventures Table [Text Block] Schedule of consolidated balance sheet related to unconsolidated joint ventures. Total operating lease liabilities Total present value of lease liabilities Operating Lease, Liability Repayment of private placement debt Repayment Of Private Placement Debt Repayment of private placement Debt. Senior Note, Series C Series C Senior Note [Member] Series C senior note. Measurement Frequency [Axis] Deferred Tax Assets, Operating Loss Carryforwards, Total Net operating loss carryforwards Net operating losses Deferred Tax Assets, Operating Loss Carryforwards Commitments and Contingencies Contingencies Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Number of common stock acquired by offsetting sale warrants. Number Of Common Stock Acquired By Offsetting Sale Warrants Number of common stock acquired by offsetting sale warrants. Adjustments To Warrant Repurchased Adjustments to warrant repurchased. Repurchase of warrants Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Convertible notes converted each into shares of common stock Convertible Notes Converted Each Into Shares Of Common Stock Convertible notes converted each into shares of common stock. Diluted weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted shares Finance Leases: Finance Leases [Abstract] Finance leases. Summary of Business Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Accounts receivable, net Total accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net (including $294,700 and $274,846 Accounts receivable of consolidated joint ventures, net) Total lease payments Lessee, Operating Lease, Liability, to be Paid Total other (expense) income Other Income Expense Other income (expense). Shares purchased under Employee Stock Purchase Plan Shares Purchased Under Employee Stock Purchase Plan Shares purchased under employee stock purchase plan. Cybersecurity Risk Management Third Party Engaged [Flag] Additional amount agreed to pay the selling shareholders in the event an earn out revenue target is exceeded Additional Payment For Selling Shareholders Additional payment for selling shareholders. I.S. Engineers, LLC I.S. Engineers, L L C [Member] I.S. Engineers, LLC. Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Legal Matter Legal Matter [Member] Legal Matter. Finance Lease, Liability, Total Total present value of lease liabilities Finance Lease, Liability Comprehensive income including noncontrolling interests, net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Margin interest rate Debt Instrument, Basis Spread on Variable Rate Credit agreement number of extensions Line Of Credit Facility Number Of Extensions Line of credit facility number of extensions. Repurchases of common stock Repurchases of common stock Adjustments To Additional Paid In Capital Repurchases Of Common Stock Adjustments to additional paid in capital repurchases of common stock. Debt and Credit Facilities Debt Disclosure [Text Block] Number of shares sold Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Purchased for Award Net operating loss carryforwards, expiration description Deferred Tax Operating Loss Carryforwards Expiration Description Deferred tax operating loss carryforwards expiration description. Senior note, amount paid Repayments of Debt Intangible assets Deferred Tax Liabilities, Intangible Assets Gain (Loss), Foreign Currency Transaction, before Tax, Total Foreign currency transaction gains and losses Gain (Loss), Foreign Currency Transaction, before Tax Contract assets Increase (Decrease) in Contract with Customer, Asset Fair Value, by Balance Sheet Grouping [Table Text Block] Summary of Carrying Values and Estimated Fair Values Of Financial Instruments Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Credit Facility Credit Facility [Axis] Unsecured Revolving Credit Facility Revolving Credit Facility Revolving Credit Facility [Member] Other Long-term Liabilities Other Liabilities Disclosure [Text Block] Convertible Notes Converted Sale Price Of Common Stock Convertible Notes Converted Sale Price Of Common Stock Convertible notes converted sale price of common stock Equity-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Summary of Fair Value Assets Associated with Pension Plan Summary Of Fair Value Assets Associated With Pension Plan Table [Text Block] Summary of fair value assets associated with pension plan. Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Accrued Expenses and Other Current Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Repurchases of Convertible Notes Repurchases of convertible notes. Repurchases of convertible notes due 2025 Repurchases of convertible notes due 2025 Dilutive effect of stock-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Intangible Assets, Net (Excluding Goodwill), Total Intangible assets, net Intangible Assets, Net (Excluding Goodwill) U.S. States State and Local Jurisdiction [Member] Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability ESOP Employee Stock Ownership Plan [Member] Employee Stock Ownership Plan. Measurement Frequency [Domain] Concentration of Credit Risk Credit Concentration Risk [Member] Valuation allowance Deferred tax assets, valuation allowance Deferred Tax Assets, Valuation Allowance Numerator for Basic and Diluted EPS: Numerator For Basics And Diluted EPS [Abstract] Numerator for basics and diluted EPS Level 3 Fair Value, Inputs, Level 3 [Member] Operating leases Operating Lease, Weighted Average Remaining Lease Term Other noncurrent assets Finance Leases Other Assets Noncurrent Finance leases other assets noncurrent. Subsequent Events Subsequent Events [Text Block] Equity-based Awards Share-Based Payment Arrangement [Member] Quarterly Financial Information Disclosure [Abstract] Schedule of Numerator and Denominator used to Compute Basic and Diluted EPS Schedule of Numerator and Denominator Used to Compute Basic and Diluted Earnings Per Share Table Text Block Schedule of Numerator and Denominator Used to Compute Basic and Diluted Earnings Per Share Table Text Block Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Cybersecurity Risk Management Positions or Committees Responsible [Flag] Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Accounts payable (including $28,214 and $49,234 Accounts payable of consolidated joint ventures) Contributions of treasury stock Other Postretirement Benefits Expense (Reversal of Expense), Noncash Change in accounting principle, accounting standards update, immaterial effect Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] Liabilities, fair value disclosure Liabilities, Fair Value Disclosure Liabilities, Fair Value Disclosure, Total Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Equity compensation Schedule of Financial Information of Consolidated Joint Ventures Schedule Of Financial Information Of Consolidated Joint Ventures Table [Text Block] Schedule of financial information of consolidated joint ventures. Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Other Other Reconciliation From Net Income To Adjusted E B I T D A Other reconciliation from net income to adjusted EBITDA. ASU 2024-04 Accounting Standards Update 2024-04 [Member] Accounting standards update 2024-04. Short-Term Lease, Cost Short-term lease cost