XML 143 R123.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Income Taxes Income Taxes - NOL Usage Table (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($)
Net Income Loss Reconciliation [Line Items] |
NOL allocated amount | $ 1,663,087
Loss Carryforward Indefinite Life | 158,663
Ambac Assurance [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated amount | 1,952,621
AFG [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated amount | $ 1,663,087
Minimum [Member] | Ambac Assurance [Member] |
Net Income Loss Reconciliation [Line Items] |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2030
Maximum [Member] | Ambac Assurance [Member] |
Net Income Loss Reconciliation [Line Items] |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2042

X
- Definition Loss Carryforward Indefinite Life + References No definition available. + Details
Name: | ambc_LossCarryforwardIndefiniteLife
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net Income Loss Reconciliation [Line Items] + References No definition available. + Details
Name: | ambc_NetIncomeLossReconciliationLineItems
Namespace Prefix: | ambc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Expiration date of each operating loss carryforward included in operating loss carryforward, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
Name: | us-gaap_OperatingLossCarryforwardsExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=ambc_AmbacAssuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ambc_AfgMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |