XML 123 R102.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Derivative Instruments - Summary of Location and Amount of Gains and Losses of Derivative Contracts (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ (1) | $ 129 | $ 22
Derivative, Gain (Loss) on Derivatives, Total Net | (64) | 694 | (128)
Variable Interest Entity [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (63) | 565 | (150)
Interest Rate Swaps [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (1) | 65 | 13
Interest Rate Swaps [Member] | Variable Interest Entity [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (62) | 541 | (152)
Currency Swaps [Member] | Variable Interest Entity [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (1) | 24 | 2
Futures Contracts [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 62 | 9
Warrant [Member] |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 0 | $ 1 | $ 0

X
- Definition Derivative, Gain (Loss) on Derivatives, Total Net + References No definition available. + Details
Name: | ambc_DerivativeGainLossonDerivativesTotalNet
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CurrencySwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_FutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |