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Notes, Due 2030 [Member] 7.5% Senior Notes, Due 2030 Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Class of warrant or right, number of securities called by each arrant or right (in dollars per share) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Unrealized Gain (Loss) on Derivative Instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Enabling Services segment disposal Enabling Services Segment Disposal [Member] Enabling Services Segment Disposal Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Schedule of Accounts Receivable, Unbilled Services and Unearned Revenue Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Statement [Table] Statement [Table] Other, net Other Nonoperating Income (Expense) 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(in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Income tax benefits Share-Based Payment Arrangement, Expense, Tax Benefit Termination Date Trading Arrangement Termination Date Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Debt issuance discount and fees Debt Issuance Costs, Noncurrent, Net Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Outstanding shares, basic (in shares) Weighted Average Number of Shares Outstanding, Basic SUPPLEMENTAL CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] Direct costs, exclusive of depreciation and amortization Direct costs Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of Reconciliation of Basic Earnings per Share to Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Capitalized Contract Cost [Line Items] Capitalized Contract Cost [Line Items] Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other income (expense): Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number Costs and expenses: Costs and Expenses [Abstract] Amounts reclassified from accumulated other comprehensive loss Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Unbilled services Contract with Customer, Asset, before Allowance for Credit Loss, Current (Provision) benefit for income tax related to items of comprehensive income Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Unrealized gain (loss) on derivative instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent Insider Trading Arrangements [Line Items] Corporate, non-segment Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Goodwill and other asset impairments Goodwill and other asset impairments Goodwill and Intangible Asset Impairment Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Commitment fee Line of Credit Facility, Commitment Fee Percentage Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Facility and Other Costs Facility Cost [Member] Facility Cost Common Stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation