XML 76 R63.htm IDEA: XBRL DOCUMENT
v3.25.1

Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Mar. 31, 2024
--- | --- | ---
Financial Guarantee Insurance Contracts, Claim Liability [Line Items] |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered |  | $ 15,088
Financial Guarantee |  |
Financial Guarantee Insurance Contracts, Claim Liability [Line Items] |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered | $ 56,190 |

X
- Definition Ceded Loss And Loss Expenses Paid Not Yet Recovered + References No definition available. + Details
Name: | ambc_CededLossAndLossExpensesPaidNotYetRecovered
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-34 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(ix) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(viii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(vii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(vi) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(v) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a)(5)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-9 + Details
Name: | us-gaap_FinancialGuaranteeInsuranceContractsClaimLiabilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReportingUnitAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |