XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.19.1

Investments - Components of the net unrealized gain on securities that is included in AOCI in the Balance Sheet (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Unrealized gain on: |  |  |
Pretax |  | $ 588 | $ 105
Deferred Tax |  | (124) | (22)
Net |  | 464 | 83
Total fixed maturities |  |  |
Unrealized gain on: |  |  |
Pretax |  | 1,013 | 160
Deferred Tax |  | (213) | (34)
Net |  | 800 | 126
Fixed maturities — annuity segment |  |  |
Unrealized gain on: |  |  |
Pretax | [1] | 792 | 101
Deferred Tax | [1] | (166) | (21)
Net | [1] | 626 | 80
Fixed maturities — all other |  |  |
Unrealized gain on: |  |  |
Pretax |  | 221 | 59
Deferred Tax |  | (47) | (13)
Net |  | 174 | 46
Deferred policy acquisition costs — annuity segment |  |  |
Unrealized gain on: |  |  |
Pretax |  | (325) | (42)
Deferred Tax |  | 68 | 9
Net |  | (257) | (33)
Annuity benefits accumulated |  |  |
Unrealized gain on: |  |  |
Pretax |  | (108) | (14)
Deferred Tax |  | 23 | 3
Net |  | (85) | (11)
Unearned revenue |  |  |
Unrealized gain on: |  |  |
Pretax |  | 8 | 1
Deferred Tax |  | (2) | 0
Net |  | $ 6 | $ 1
[1] | Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

X
- Definition Accumulated other comprehensive income loss available for sale securities adjustment deferred tax and non controlling interest. + References No definition available. + Details
Name: | afg_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentDeferredTaxAndNonControllingInterest
Namespace Prefix: | afg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Accumulated other comprehensive income loss available for sale securities adjustment, pretax. + References No definition available. + Details
Name: | afg_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentPretax
Namespace Prefix: | afg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition unrealized gain on securities, included in Accumulated Other Comprehensive Income. + References No definition available. + Details
Name: | afg_UnrealizedGainOnSecuritiesIncludedInAccumulatedOtherComprehensiveIncomeAbstract
Namespace Prefix: | afg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated unrealized gain (loss), after tax, on 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_FixedMaturitiesAnnuitySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_FixedMaturitiesAllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_DeferredPolicyAcquisitionCostsAnnuitySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_AnnuityBenefitsAndOtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_UnearnedRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |