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Background and Business Description Stipulation and Order (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($)
AAC Transaction Amount Requiring OCI Approval | $ 100

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- Definition AAC Transaction Amount Requiring OCI Approval + References No definition available. + Details
Name: | ambc_AACTransactionAmountRequiringOCIApproval
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration