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Share-Based Payment Arrangement, Percent Statutory U.S. rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Commitments and contingent liabilities (Note 15) Commitments and Contingencies Operating Lease Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Debt securities Defined Benefit Plan, Debt Security [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Five Cliff vesting period Share Based Compensation Arrangement By Share Based Payment Award, Cliff Vesting Period Share Based Compensation Arrangement By Share Based Payment Award, Cliff Vesting Period Liability Derivative Liability, Not Subject to Master Netting Arrangement Schedule of Goodwill [Table] Schedule of Goodwill [Table] Geographical [Axis] 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Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-average grant date fair value per option (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Long term debt Long-Term Debt, Fair Value Net income (loss) Net income (loss) Net earnings Net Income (Loss) Estimated amortization expense, thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Total current liabilities Liabilities, Current Derivative Contract [Domain] Derivative Contract [Domain] Foreign Currencies Foreign Currency Transactions and Translations Policy [Policy Text Block] Machinery and equipment Machinery and Equipment [Member] LEASES Lessee, Operating Leases [Text Block] Benefits and administrative expenses paid Defined Benefit Plan, Plan Assets, Benefits Paid Accrued interest Interest Payable, Current LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Operating lease liability Deferred Tax Assets, Operating Lease, Liability Deferred Tax Assets, Operating Lease, Liability Foreign currency exchange rate changes Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Fair Value Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Changes in enacted tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Contract with Customer, Liability Contract with Customer, Liability Pre-Tax Gain (Loss) Included in Other Comprehensive Income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Unrealized gain (loss) on derivative instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Other Other Intangible Assets [Member] Reconciliation of Basic Earnings per Share to Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Service cost for benefits earned Defined Benefit Plan, Service Cost Corporate and other allocations Direct costs Related Party Transaction, Amounts of Transaction Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Proceeds from sale of assets Proceeds from Sale of Productive Assets Foreign currency Forward contracts Foreign Exchange Contract [Member] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted Stock, Restricted Stock Units and Performance Shares Restricted Stock, Restricted Stock Units And Performance Shares [Member] Restricted Stock, Restricted Stock Units And Performance Shares SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Converted (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Converted In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Converted In Period Exercised (in dollar per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Level 1 Fair Value, Inputs, Level 1 [Member] Deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Carrying Value Reported Value Measurement [Member] Goodwill, net Balance as of January 1 Balance at end of year Goodwill Increases related to positions taken on prior year items Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Schedule of Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Equity Components [Axis] Equity Components [Axis] Right of use asset Deferred Tax Liabilities, Operating Lease, Right-Of-Use Asset Deferred Tax Liabilities, Operating Lease, Right-Of-Use Asset Increase (decrease) in accrued expenses and other Increase (Decrease) in Accrued Liabilities Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Measurement Basis [Axis] Measurement Basis [Axis] 2025 Long-Term Debt, Maturity, Year Two Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Entity Small Business Entity Small Business Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Estimated amortization expense, 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Four ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Restructuring and other charges Total Restructuring and other charges Restructuring and Related Cost, Incurred Cost Local Phone Number Local Phone Number Fair Value Measurement [Domain] Fair Value Measurement [Domain] Letter of credit Letter of Credit [Member] Selling, general and administrative Selling, General and Administrative Expenses [Member] Derivative, notional amount Derivative, Notional Amount Accounts receivable and unbilled services Accounts Receivable [Member] Operating lease liabilities Total maturities, due beyond one year Operating Lease, Liability, Noncurrent Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Restricted Stock Units Restricted Stock Units (RSUs) [Member] Debt term Debt Instrument, Term Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Depreciation Depreciation Former parent investment Net Parent Investment Net Parent Investment Retirement Benefits [Abstract] Debt issuance costs Payments of Debt Issuance Costs Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Income Statement Location [Axis] Income Statement Location [Axis] Schedule of Debt Schedule of Long-Term Debt Instruments [Table Text Block] R&D credit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Property, plant and equipment, net Property, plant and equipment, net and operating lease ROU assets Property, Plant, And Equipment And Operating Lease Right-of-Use Asset, After Accumulated Depreciation And Amortization Property, Plant, And Equipment And Operating Lease Right-of-Use Asset, After Accumulated Depreciation And Amortization Schedule of Maturity of Lease Liabilities Lessee, Operating Lease, 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Commission Assets Plan Name [Domain] Plan Name [Domain] Disclosure of non-cash investing activities: Noncash Investing and Financing Items [Abstract] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Non-current Restructuring Reserve, Noncurrent Interest expense Interest expense Interest Expense Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Number of shares authorized for future issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Hedging Designation [Axis] Hedging Designation [Axis] Goodwill [Line Items] Goodwill [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Outstanding, weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Right-of-use assets obtained in exchange for lease obligations, operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Performance obligation partially satisfied in previous period, revenue recognized (reduction) Contract with Customer, Performance Obligation Satisfied in Previous Period Business contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Use of Estimates Use of Estimates, Policy [Policy Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Asset Derivative Asset, Not Subject to Master Netting Arrangement Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Prepaid expenses Prepaid Expense, Current Short-term operating lease liabilities Short-term operating lease liabilities Less current portion Operating Lease, Liability, Current 2026 Long-Term Debt, Maturity, Year Three Decreases related to positions taken on prior year items Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Annual agency fee Line of Credit Facility, Annual Agency Fee Line of Credit Facility, Agency Fee Auditor Firm ID Auditor Firm ID Amortization of intangible assets Amortization of Intangible Assets Entity Shell Company Entity Shell Company 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Change in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Net Carrying Amount Finite-Lived Intangible Assets, Net Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Recently Issued and Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Expected future employer contributions, next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next 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Award vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Stock options Employee Stock Option [Member] DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Employer matching contribution, percent of match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Unrecognized compensation cost, recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Senior secured revolving credit facility Senior Secured Revolving Credit Facility [Member] Senior Secured Revolving Credit Facility Total costs and expenses Costs and Expenses Maximum Maximum [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Restructuring and Other Charges Restructuring and Related Costs [Table Text Block] Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Goodwill acquired during the period Goodwill, Acquired During Period Funded status Defined Benefit Plan, Funded (Unfunded) Status of Plan Federal Domestic Tax Authority [Member] Short-term lease expense Short-Term Lease, Cost Entity Address, Address Line One Entity Address, Address Line One Operating loss carryforwards, subject to expiration Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration Thereafter Long-Term Debt, Maturity, after Year Five Direct costs, exclusive of depreciation and amortization (including costs incurred from related parties of $48.8, $87.1 and $70.1 during the years ended December 31, 2023, 2022 and 2021, respectively. See Note 18.) Direct costs, exclusive of depreciation and amortization Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Subsequent Event [Table] Subsequent Event [Table] STOCK COMPENSATION PLANS Share-Based Payment Arrangement [Text Block] Federal Current Federal Tax Expense (Benefit) Total contract assets Capitalized Contract Cost, Net Basis of Financial Statement Presentation Basis of Accounting, Policy [Policy Text Block] Other, net Other Noncash Income (Expense) Weighted-Average Exercise Price per Option Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Accrued taxes Taxes Payable, Current Net transfers (to) from Former Parent Net Transfers From (To) Parent, Excluding Special Payment. Net Transfers From (To) Parent, Excluding Special Payment. Remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Less: allowance for credit losses Allowance for credit losses, beginning balance Allowance for credit losses, ending balance Accounts Receivable, Allowance for Credit Loss, Current Subsequent event Subsequent Event [Member] Uncertain tax positions, accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Customer concentration risk Customer Concentration Risk [Member] State Deferred State and Local Income Tax Expense (Benefit) Schedule of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Interest expense carryforward Deferred Tax Asset, Interest Carryforward Clinical Services Clinical Services Segment [Member] Clinical Services Segment Income Statement [Abstract] Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Costs and expenses: Costs and Expenses [Abstract] Research & development 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dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Other Other Assets, Current Income Tax Disclosure [Abstract] Derivative, fixed interest rate Derivative, Fixed Interest Rate Schedule of Accounts Receivable, Unbilled Services and Unearned Revenue Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Foreign exchange loss Foreign Currency Gain (Loss) [Member] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Foreign currency impact and other adjustments to goodwill Goodwill, Foreign Currency Translation Gain (Loss) Special payment to Former Parent Special Payment To Former Parent Special Payment To Former Parent Capitalized assets, amortization Capitalized Contract Cost, Amortization Change in right-of-use lease assets Transfer To (From) Parent, Change In Right-Of-Use Lease Asset Transfer To (From) Parent, Change In Right-Of-Use Lease Asset Other Other Geographical Areas [Member] Other Geographical Areas Restructuring liabilities, expected payout period Restructuring Reserve, Expected Payout Period Restructuring Reserve, Expected Payout Period Statistical Measurement [Axis] Statistical Measurement [Axis] Direct costs, exclusive of depreciation and amortization Direct Costs, Related Party [Member] Direct Costs, Related Party Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Capitalized R&D Costs Deferred Tax Assets, Capitalized Research And Development Costs Deferred Tax Assets, Capitalized Research And Development Costs Significant change in unrecognized tax benefits reasonably possible in next 12 months Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Deferred income taxes and other tax liabilities Deferred Income Taxes and Other Tax Liabilities, Noncurrent Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Foreign Deferred Foreign Income Tax Expense (Benefit) Summary of Capitalized Contract Cost Capitalized Contract Cost [Table Text Block] Segments [Domain] Segments [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Less accumulated depreciation Property, Plant, And Equipment And Operating Lease Right-of-Use Asset, Accumulated Depreciation And Amortization Property, Plant, And Equipment And Operating Lease Right-of-Use Asset, Accumulated Depreciation And Amortization Accumulated deficit Retained Earnings (Accumulated Deficit) Commitments and Contingencies Disclosure [Abstract] Loss contingency, provision Loss Contingency Accrual, Provision Recognition of Revenues and Contract costs Revenue from Contract with Customer [Policy Text Block] Aggregate principal amount issued Debt Instrument, Face Amount Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current assets: Assets, Current [Abstract] Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Leases [Abstract] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Entity Address, State or Province Entity Address, State or Province Other Defined Benefit Plan, Other [Member] Defined Benefit Plan, Other Schedule of Estimated Fair Value of Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Debt issuance discount and fees Debt Issuance Costs, Current, Net Estimated amortization expense, 2024 Finite-Lived Intangible Asset, Expected Amortization, Year One Variable lease payments Variable Lease, Payment Operating cash flows from operating leases Operating Lease, Payments Reimbursable Out-of-Pocket Expenses Reimbursable Out-Of-Pocket Expense [Policy Text Block] Reimbursable Out-Of-Pocket Expense Common stock, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Interest cost on benefit obligation Defined Benefit Plan, Interest Cost Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Auditor Location Auditor Location Corporate costs not allocated to segments Other Cost and Expense, Operating Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] PENSION AND POSTRETIREMENT PLANS Retirement Benefits [Text Block] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Increase in accounts receivable and unbilled services, net Increase (Decrease) In Accounts Receivable And Contract With Customer, Asset Increase (Decrease) In Accounts Receivable And Contract With Customer, Asset Cash and cash equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Operating loss carryforwards, federal, foreign Deferred Tax Assets, Operating Loss Carryforwards, Foreign Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Employee contribution, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Customer [Domain] Customer [Domain] Amounts Reclassified from Other Comprehensive Loss into Earnings Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Interest rate swaps Interest Rate Swap [Member] Debt Instrument [Axis] Debt Instrument [Axis] Effective rate Effective Income Tax Rate Reconciliation, Percent Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Total operating lease liabilities Operating Lease, Liability Net benefit plan adjustments Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Converted (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Converted In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Converted In Period, Weighted Average Grant Date Fair Value Credit Facility [Axis] Credit Facility [Axis] Schedule Of Long-Term Debt Maturities Schedule of Maturities of Long-Term Debt [Table Text Block] Total liabilities Liabilities Current income taxes Current Income Tax Expense (Benefit) Purchase price Disposal Group, Including Discontinued Operation, Consideration Vesting [Domain] Vesting [Domain] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Increase in prepaid expenses and other Increase (Decrease) in Prepaid Expense and Other Assets Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Revenue, Remaining Performance Obligation, 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