XML 78 R66.htm IDEA: XBRL DOCUMENT v3.21.1

Managed Investment Entities - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) collateralizedloanobligation	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Variable Interest Entity [Line Items]
Percentage of investment of most subordinate debt tranche, including discontinued operations, minimum	15.00%
Percentage of investment of most subordinate debt tranche, including discontinued operations, maximum	100.00%
Percentage of investment of most subordinate debt tranche, Minimum	4.50%
Percentage of investment of most subordinate debt tranche, Maximum	46.80%
Number of collateralized loan obligation entities | collateralizedloanobligation	12
Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date		$ 57
Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date		39
Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities	$ 29
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments	100		$ 150
Difference between aggregate unpaid principal balance and carrying value of CLOs' debt	104		141
Carrying amount of CLO loans in default	27		11
Aggregate unpaid principal balance of variable interest entity loans in default	47		28
Available for sale (AFS) fixed maturities	9,289		9,084
Maximum
Variable Interest Entity [Line Items]
Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities		1
Collateralized loan obligations | Managed by third parties
Variable Interest Entity [Line Items]
Available for sale (AFS) fixed maturities	1,131		1,062
Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	181	$ 161	$ 200
Variable interest entity, primary beneficiary | Subordinated Debt Obligations
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	$ 121

X

- Definition

Aggregate unpaid principal balance of variable interest entity loans in default

+ References

No definition available.

+ Details

Name:	afg_Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date.

+ References

No definition available.

+ Details

Name:	afg_AmountPaidBySubsidiariesToPurchaseManagedInvestmentEntitiesLiabilitiesAfterIssuanceDate.
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Carrying amount of variable interest entity loans in default.

+ References

No definition available.

+ Details

Name:	afg_CarryingAmountOfVariableInterestEntityLoansInDefault
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Difference between aggregate unpaid principal balance and fair value of variable interest entity debt.

+ References

No definition available.

+ Details

Name:	afg_DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityDebt
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Difference between aggregate unpaid principal balance and fair value of variable interest entity investments.

+ References

No definition available.

+ Details

Name:	afg_DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityInvestments
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date.

+ References

No definition available.

+ Details

Name:	afg_FaceAmountOfManagedInvestmentEntitiesLiabilitiesPurchasedBySubsidiariesAfterIssuanceDate
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of collateralized loan obligation entities.

+ References

No definition available.

+ Details

Name:	afg_NumberOfCollateralizedLoanObligationEntities
Namespace Prefix:	afg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum percentage of investment of most subordinate debt tranche of variable interest entity.

+ References

No definition available.

+ Details

Name:	afg_PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMaximum
Namespace Prefix:	afg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of investment of most subordinate debt tranche of variable interest entity maximum, including discontinued operations

+ References

No definition available.

+ Details

Name:	afg_PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMaximumIncludingDiscontinuedOperations
Namespace Prefix:	afg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum percentage of investment of most subordinate debt tranche of variable interest entity.

+ References

No definition available.

+ Details

Name:	afg_PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMinimum
Namespace Prefix:	afg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of investment of most subordinate debt tranche of variable interest entity minimum, including discontinued operations

+ References

No definition available.

+ Details

Name:	afg_PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMinimumIncludingDiscontinuedOperations
Namespace Prefix:	afg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities.

+ References

No definition available.

+ Details

Name:	afg_ProceedsReceivedBySubsidiariesRelatedtoSalesandRedemptionsofManagedInvestmentEntitiesLiabilities
Namespace Prefix:	afg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5747-111685

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5728-111685

+ Details

Name:	us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

No definition available.

+ Details

Name:	us-gaap_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=afg_ManagedbyThirdPartiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SubordinatedDebtObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: