XML 166 R144.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Commitments and Contingencies (Details) - LBIE vs. AG Financial Products $ in Millions | Jul. 01, 2023 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 28, 2011 USD ($) Transaction
--- | --- | --- | --- | --- | ---
Pending Litigation |  |  |  |  |
Commitments and Contingencies Legal Proceedings |  |  |  |  |
Amount awarded from other party |  | $ 54 |  |  |
Annual interest rate |  | 8.00% |  |  |
Damages sought | $ 58 |  |  |  |
AG Financial Products Inc. | Positive Outcome of Litigation | Pending Litigation |  |  |  |  |
Commitments and Contingencies Legal Proceedings |  |  |  |  |
Loss contingency accrual |  |  | $ 0 | $ 20 |
Termination payments which LBIE owes to AG financial products as per calculation of AG financial products |  |  |  |  | $ 4
Payment for termination of other credit derivative transactions |  |  |  |  | $ 21
Lehman Brothers International (Europe) |  |  |  |  |
Commitments and Contingencies Legal Proceedings |  |  |  |  |
Number of credit derivative transactions alleged to be improperly terminated | Transaction |  |  |  |  | 28
Lehman Brothers International (Europe) | Positive Outcome of Litigation | Pending Litigation |  |  |  |  |
Commitments and Contingencies Legal Proceedings |  |  |  |  |
Termination payments which AG Financial Products owes to LBIE as per calculation of LBIE |  |  |  |  | $ 1,400
Guarantee Obligations | AG Financial Products Inc. |  |  |  |  |
Commitments and Contingencies Legal Proceedings |  |  |  |  |
Number of credit derivative transactions for which termination payment is alleged to be improperly calculated | Transaction |  |  |  |  | 9

X
- Definition Represents the amount of payment on the termination of credit derivatives transactions which the defendant owes to plaintiff as per the calculation of plaintiff. + References No definition available. + Details
Name: | ago_GainContingencyAllegationsPaymentForTerminationofCreditDerivativeTransactionsOwedbyDefendanttoPlaintiffAsPerCalculationofPlaintiff
Namespace Prefix: | ago_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of payment on the termination of credit derivatives transactions which the plaintiff owes to defendant as per the calculation of defendant. + References No definition available. + Details
Name: | ago_GainContingencyAllegationsPaymentForTerminationofCreditDerivativeTransactionsOwedbyPlaintifftoDefendantAsPerCalculationofDefendant
Namespace Prefix: | ago_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Gain Contingency, Allegations, Payment For Termination of Other Credit Derivative Transactions Owed by Plaintiff to Defendant As Per Calculation of Defendant + References No definition available. + Details
Name: | ago_GainContingencyAllegationsPaymentForTerminationofOtherCreditDerivativeTransactionsOwedbyPlaintifftoDefendantAsPerCalculationofDefendant
Namespace Prefix: | ago_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Gain Contingency, Damages Sought, Value + References No definition available. + Details
Name: | ago_GainContingencyDamagesSoughtValue
Namespace Prefix: | ago_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Litigation Settlement, Amount Awarded from Other Party, Annual Interest Rate + References No definition available. + Details
Name: | ago_LitigationSettlementAmountAwardedFromOtherPartyAnnualInterestRate
Namespace Prefix: | ago_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit derivative transactions which the entity has improperly terminated as per the allegations of the plaintiff. + References No definition available. + Details
Name: | ago_LossContingencyCreditDerivativeTransactionImproperlyTerminatedAsPerTheAllegationsOfThePlaintiffNumber
Namespace Prefix: | ago_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of credit derivative transactions which the entity has improperly calculated termination payment as per the allegations of the plaintiff. + References No definition available. + Details
Name: | ago_LossContingencyCreditDerivativeTransactionsImproperlyCalculatedTerminationPaymentAsPerTheAllegationsOfThePlaintiffNumber
Namespace Prefix: | ago_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedFromOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-10 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_LitigationCaseAxis=ago_LehmanBrothersInternationalEuropeVsAgFinancialProductsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_GainContingenciesByNatureAxis=us-gaap_PositiveOutcomeOfLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_GuaranteeObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |