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Activities Disclosures [Line Items] Other current liabilities Other Current Liabilities [Member] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Depreciation and amortization Depreciation Depreciation, Depletion and Amortization, Nonproduction Basic earnings (loss) per share (in dollars per share) Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic Decrease in accounts payable Increase (Decrease) in Accounts Payable Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Amortization Amortization Derivatives designated as hedging instruments: Designated as Hedging Instrument [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 7.5% senior notes due 2030 7.5% Senior Notes, Due 2030 [Member] 7.5% Senior Notes, Due 2030 Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Enabling Services segment disposal Enabling Services Segment Disposal [Member] Enabling Services Segment Disposal Total assets Assets Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Line of credit, outstanding balance Long-Term Line of Credit Share-based compensation arrangement by share-based payment award, equity instruments other than option (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Other liabilities Other Liabilities, Noncurrent Direct costs, exclusive of depreciation and amortization Direct costs Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Commitments and contingent liabilities (Note 9) Commitments and Contingencies Customer two Customer Two [Member] Customer Two Termination Date Trading Arrangement Termination Date Number of countries with primary office locations Number Of Countries With Primary Office Locations Number Of Countries With Primary Office Locations Operating Activities [Domain] Operating Activities [Domain] Foreign exchange gain (loss) Foreign Currency Gain (Loss) [Member] STOCK COMPENSATION PLANS Share-Based Payment Arrangement [Text Block] Derivatives not designated as hedging instruments: Not Designated as Hedging Instrument [Member] Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Total stock compensation expense Share-Based Payment Arrangement, Expense DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Net loss Net loss Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number REVENUES Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Current year adjustments, before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date Loss contingency, provision Loss Contingency Accrual, Provision Unrealized gain (loss) on derivative instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent Other, net Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Insider Trading Arrangements [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Discontinued operations, disposed of by sale Discontinued Operations, Disposed of by Sale [Member] Diluted earnings (loss) per share continuing from operations (in dollars per share) Per share amount, diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Unearned revenue, revenue recognized Contract with Customer, Liability, Revenue Recognized Adjustment to Compensation: Adjustment to Compensation [Axis] Prepaid expenses and other Prepaid Expense and Other Assets, Current Accounts receivable and unbilled services Accounts Receivable [Member] Foreign currency forward contracts Foreign Exchange Contract [Member] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report (Increase) decrease in accounts receivable and unbilled services, net Decrease (Increase) In Accounts Receivable And Contract With Customer, Asset Decrease (Increase) In Accounts Receivable And Contract With Customer, Asset Customer [Domain] Customer [Domain] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Accumulated Deficit Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Outstanding shares, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Proceeds from sale of assets Proceeds from Sale of Productive Assets Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] North America North America [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Revenue Revenue Benchmark [Member] Facility Costs Facility Cost [Member] Facility Cost Entity Filer Category Entity Filer Category Beginning balance Ending balance Restructuring Reserve Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Letter of credit Letter of Credit [Member] Net income (loss), diluted Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Company Selected Measure Name Company Selected Measure Name