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Vesting [Axis] Additional paid-in capital Additional Paid in Capital Stock-based compensation, including cRSUs Cost, Direct Labor, Share-Based Compensation Cost, Direct Labor, Share-Based Compensation Name Awards Close in Time to MNPI Disclosures, Individual Name 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] General and administrative expenses General and Administrative Expenses General and Administrative Expense Total commitments (as a percent) Debt Instrument, Covenant, Revolver Ratio, Minimum Aggregate Amount Of Total Commitments, Percent Debt Instrument, Covenant, Revolver Ratio, Minimum Aggregate Amount Of Total Commitments, Percent Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, $0.0001 par value — 10,000,000 shares authorized; no shares issued Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] 2025 Revolving Credit Facility 2025 Revolving Credit Facility [Member] 2025 Revolving Credit Facility Reclassifications of loss recognized to interest expense Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Fixed-rate basis (in percent) Derivative, Average Fixed Interest Rate Hedging Designation [Domain] Hedging Designation [Domain] Douglas Garis [Member] Douglas Garis Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Prepaid taxes Prepaid Taxes Hedging Designation [Axis] Hedging Designation [Axis] Second-Out First Lien B Notes Second-Out First Lien B Notes [Member] Second-Out First Lien B Notes Anti-dilutive warrants outstanding and unvested founder shares Warrants And Unvested Founder Shares [Member] Warrants And Unvested Founder Shares Credit Facility [Axis] Credit Facility [Axis] Issuance of common stock in connection with employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Ownership Plan Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Long-term debt Total Long-term debt, net Long-term debt Long-Term Debt and Lease Obligation Name Measure Name Loss on disposal of leases Gain (Loss) on Disposition Of Leases Gain (Loss) on Disposition Of Leases Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Supplemental disclosure of cash flow information: Supplemental Cash Flow Elements [Abstract] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Unbilled Independent Dispute Resolution fees, net Unbilled Fees, Net, Current Unbilled Fees, Net, Current Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] 5.750% Notes 5.750% Notes [Member] 5.750% Notes Entity Address, Address Line Two Entity Address, Address Line Two Stock-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Net loss Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Line of credit facility, accordion feature, increase limit Line of Credit Facility, Accordion Feature, Increase Limit Line of credit facility, accordion feature, increase limit, subject to certain conditions by obtaining additional commitments from existing and/or new lenders. Non-PEO NEO Non-PEO NEO [Member] Senior notes Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Operating lease right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Benefit for income taxes Benefit for income taxes Income Tax Expense (Benefit) Anti-dilutive Senior Convertible PIK Notes Convertible Notes Payable [Member] Technology Technology-Based Intangible Assets [Member] Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net loss attributable to Claritev Corporation Net loss Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Variable Rate Component One Variable Rate Component One [Member] Variable Rate Component One Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] Interest income Interest income Investment Income, Interest Provider network Provider Networks [Member] Provider Networks Fed Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Anti-dilutive stock-based compensation awards Share-Based Payment Arrangement [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract]