XML 57 R42.htm IDEA: XBRL DOCUMENT
v3.24.3

Business and Basis of Presentation (Details) |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2024 USD ($) level3FinancialInstruments | Mar. 31, 2025 USD ($) | Sep. 30, 2024 | Aug. 02, 2024
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 60.00%
Business Combination, Total Consideration | $ 281,000,000 |  |  |
Business Combination, Consideration Paid in Cash | $ 252,000,000 |  |  |
Current Rate | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |
Short-Term Debt, Percentage Bearing Variable Interest Rate |  |  | 4.50% |
First Rate Increase | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |
Short-Term Debt, Percentage Bearing Variable Interest Rate |  |  | 5.50% |
Second Rate Increase | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |
Short-Term Debt, Percentage Bearing Variable Interest Rate |  |  | 6.50% |
Subsequent Event |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 60.00% |  |  |
Business Combination, Percentage Ownership Retained by Rollover Shareholders | 20.00% |  |  |
Business Combination, Number of Shares Issued for Beat Acquisition | level3FinancialInstruments | 2,216,023 |  |  |
Business Combination, AAC Cash Consideration for Beat Acquisition | $ 62,000,000 |  |  |
Business Combination, Credit Facility Cash Used for Beat Acquisition | 147,000,000 |  |  |
Business Combination, FX Forward Rate Lock | $ 1.2662 |  |  |
Business Disposal, Cash Expected to be Received |  | $ 420,000,000 |  |
Business Disposal, Termination Fee |  | 22,000,000 |  |
Business Disposal, Potential Out Of Pocket Expense Reimbursement |  | $ 6,000,000 |  |
Business Disposal, Percent of Common Shares Issued in Connection with Disposal |  | 9.90% |  |
Business Disposal, Warrant Strike Price in Connection with Disposal |  | $ 18.50 |  |
Business Disposal, Carrying Value of AAC |  | 943,000,000 |  |
Business Disposal, AAC Accumulated Other Comprehensive Loss |  | $ (90,000,000) |  |
Business Disposal, Life of Warrants Issued in Connection with AAC Disposal |  | 6 years 6 months |  |

X
- Definition Business Combination, AAC Cash Consideration for Beat Acquisition + References No definition available. + Details
Name: | ambc_BusinessCombinationAACCashConsiderationForBeatAcquisition
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Consideration Paid in Cash + References No definition available. + Details
Name: | ambc_BusinessCombinationConsiderationPaidInCash
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Credit Facility Cash Used for Beat Acquisition + References No definition available. + Details
Name: | ambc_BusinessCombinationCreditFacilityCashUsedForBeatAcquisition
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, FX Forward Rate Lock + References No definition available. + Details
Name: | ambc_BusinessCombinationFXForwardRateLock
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Number of Shares Issued for Beat Acquisition + References No definition available. + Details
Name: | ambc_BusinessCombinationNumberOfSharesIssuedForBeatAcquisition
Namespace Prefix: | ambc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business Combination, Percentage Ownership Retained by Rollover Shareholders + References No definition available. + Details
Name: | ambc_BusinessCombinationPercentageOwnershipRetainedByRolloverShareholders
Namespace Prefix: | ambc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business Combination, Total Consideration + References No definition available. + Details
Name: | ambc_BusinessCombinationTotalConsideration
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Disposal, AAC Accumulated Other Comprehensive Loss + References No definition available. + Details
Name: | ambc_BusinessDisposalAACAccumulatedOtherComprehensiveLoss
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Disposal, Carrying Value of AAC + References No definition available. + Details
Name: | ambc_BusinessDisposalCarryingValueOfAAC
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Disposal, Cash Expected to be Received + References No definition available. + Details
Name: | ambc_BusinessDisposalCashExpectedToBeReceived
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Disposal, Life of Warrants Issued in Connection with AAC Disposal + References No definition available. + Details
Name: | ambc_BusinessDisposalLifeOfWarrantsIssuedInConnectionWithAACDisposal
Namespace Prefix: | ambc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business Disposal, Percent of Common Shares Issued in Connection with Disposal + References No definition available. + Details
Name: | ambc_BusinessDisposalPercentOfCommonSharesIssuedInConnectionWithDisposal
Namespace Prefix: | ambc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business Disposal, Potential Out Of Pocket Expense Reimbursement + References No definition available. + Details
Name: | ambc_BusinessDisposalPotentialOutOfPocketExpenseReimbursement
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Disposal, Termination Fee + References No definition available. + Details
Name: | ambc_BusinessDisposalTerminationFee
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Disposal, Warrant Strike Price in Connection with Disposal + References No definition available. + Details
Name: | ambc_BusinessDisposalWarrantStrikePriceInConnectionWithDisposal
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date, which accrues interest at a rate subject to change from time to time. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ambc_InterestRateDateChangeAxis=ambc_CurrentRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ambc_InterestRateDateChangeAxis=ambc_FirstRateIncreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ambc_InterestRateDateChangeAxis=ambc_SecondRateIncreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |