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Statement - Statement of Financial Position, Unclassified - Insurance Based Operations link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Business and Basis of Presentation Background and Business Description (Notes) link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Business Combinations and Asset Acquisitions link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Insurance Contracts link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Derivative Instruments link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Revenue Recognition and Deferred Revenue link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Net Income Per Share link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Compensation Related Costs, Postemployment Benefits link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Business and Basis of Presentation Financial Services, Insurance (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Segment Reporting (Policies) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Business and Basis of Presentation Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Business Combinations and Asset Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Insurance Contracts (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Derivative Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Special Purpose Entities, Including Variable Interest Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Revenue Recognition and Deferred Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Net Income Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Compensation Related Costs, Postemployment Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Commitments and Contingencies Estimate of Future Net Minimum Lease Payments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Business and Basis of Presentation Background and Business Description - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Business and Basis of Presentation FX gain (loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Business and Basis of Presentation Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Business and Basis of Presentation Supplemental Cash Flow information (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Business and Basis of Presentation Noncontrolling Interests (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Business and Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Business and Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Business and Basis of Presentation Credit Facilities link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Business and Basis of Presentation Acquisition of ArmadaCare link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Business and Basis of Presentation Immaterial Correction of Error link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Business Combinations and Asset Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Investments - Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Investments - Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments Held by Successor Ambac, by Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Investments - Summary of Gross Unrealized Losses and Fair Values of Ambac's Available-for-Sale Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Investments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Investments - Summary of Amounts Included in Net Realized (Losses) Gains and Other-Than-Temporary Impairments (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Investments - Summary of Roll-Forward of Ambac's Cumulative Credit Losses on Debt Securities for Which Portion of Other-than-Temporary Impairment was Recognized in Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Investments - Summary of Sources of Collateral Received and Various Investment Agreement in which Collateral Pledged (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Investments - Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Investments - Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities (Phantom) (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Investments - Summary of Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Investments Investments - Equity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Fair Value Measurements - Summary of Carrying Amount and Fair Value of Ambac's Financial Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Fair Value Measurements - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Fair Value Measurements - Information about Valuation Inputs for Fixed Income Securities Classified as Level 3 (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Fair Value Measurements - Summary of Information about Described Model Inputs Used to Determine Fair Value of Each Class of Credit Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Fair Value Measurements - Information about Valuation Inputs for Variable Interest Entity Assets and Liabilities Classified as Level 3 (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Fair Value Measurements - Summary of Changes in Level 3 Fair Value Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Fair Value Measurements - Summary of Gains and Losses (Realized and Unrealized) Relating to Level 3 Assets and Liabilities Included in Earnings (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Insurance Contracts - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Financial Guarantee Insurance Contracts - Summary of Gross Premium Receivable Roll-Forward (Direct and Assumed Contracts) (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Insurance Contracts - Effect of Reinsurance on Premiums Written and Earned (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Insurance Contracts - Summarized Future Gross Undiscounted Premiums Expected to be Collected, and Future Expected Premiums Earned, Net of Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Insurance Contracts Financial Guarantee Insurance Contracts - Components of Loss and Loss Expense Reserves and Subrogation Recoverable (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Insurance Contracts - Summary of Loss Reserve Roll-Forward, Net of Subrogation Recoverable and Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Phantom) (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Insurance Contracts - Summary of Balance of RMBS Subrogation Recoveries and Related Claim Liabilities, by Estimation Approach (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Insurance Contracts Financial Guarantee Insurance Contracts - Summary of Percentage Ceded to Reinsurers and Reinsurance Recoverable and Rating Levels (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Insurance - Summary of Percentage Ceded to Reinsurers and Reinsurance Recoverable and Rating Levels (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Insurance Contracts - Premium Earned (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Derivative Instruments - Summary of Gross Fair Values of Individual Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Derivative Instruments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Derivative Instruments - Summary of Location and Amount of Gains and Losses of Derivative Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Derivative Instruments - Summary of Gross Principal Notional Outstanding for CDS Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Derivative Instruments - Summary of Notional Amounts of AFS's Trading Derivative Products (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Derivative Instruments - Schedule of Foreign Exchange Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Derivative Instruments - Summary of Notional for VIE Derivatives Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Special Purpose Entities, Including Variable Interest Entities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Special Purpose Entities, Including Variable Interest Entities - Summary of Fair Value of Fixed Income Securities, by Asset-Type, Held by Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - Special Purpose Entities, Including Variable Interest Entities - Supplemental Information about Loans Held as Assets and Long-Term Debt Associated with Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - Special Purpose Entities, Including Variable Interest Entities - Summary of Carrying Amount of Assets, Liabilities and Maximum Exposure to Loss of Ambac's Variable Interests in Non-Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - Variable Interest Entities Special Purpose Entities, including Variable Interest Entities - Summary of Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - Revenue Recognition and Deferred Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - Comprehensive Income - Schedule of Changes in Balances of Each Component of Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - Comprehensive Income - Schedule of Amounts Reclassed Out of Each Component of Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - Net Income Per Share - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - Net Income Per Share - Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - Net Income Per Share Schedule of Basic and Dilutive Securities for EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - Income Taxes - Significant Portions of Deferred Tax Liabilities and Deferred Tax Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - Disclosure - Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955594 - Disclosure - Income Taxes Income Taxes - NOL Usage Table (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - Income Taxes Schedule of Income Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955596 - Disclosure - Compensation Related Costs, Postemployment Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955597 - Disclosure - Commitments and Contingencies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink