XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.20.2

Investments - Available for sale fixed maturities (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Jun. 30, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | $ 45,297 |  |  | $ 44,524
Fixed maturities, available for sale, allowance for expected credit losses | 54 | $ 61 |  | 0
Available for sale (AFS) fixed maturities | 48,193 |  |  | 46,505
Total fixed maturities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 45,297 |  |  | 44,524
Fixed maturities, available for sale, allowance for expected credit losses | 54 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 3,204 |  |  | 2,069
Fixed maturities, Available for sale, Gross Unrealized, Losses | (254) |  |  | (88)
Available for sale (AFS) fixed maturities | 48,193 |  |  | 46,505
Total fixed maturities | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 2,950 |  |  | 1,981
U.S. Government and government agencies |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 211 |  |  | 199
Fixed maturities, available for sale, allowance for expected credit losses | 0 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 13 |  |  | 10
Fixed maturities, Available for sale, Gross Unrealized, Losses | 0 |  |  | 0
Available for sale (AFS) fixed maturities | 224 |  |  | 209
U.S. Government and government agencies | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 13 |  |  | 10
States, municipalities and political subdivisions |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 6,150 |  |  | 6,604
Fixed maturities, available for sale, allowance for expected credit losses | 0 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 575 |  |  | 363
Fixed maturities, Available for sale, Gross Unrealized, Losses | (3) |  |  | (4)
Available for sale (AFS) fixed maturities | 6,722 |  |  | 6,963
States, municipalities and political subdivisions | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 572 |  |  | 359
Foreign government |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 187 |  |  | 170
Fixed maturities, available for sale, allowance for expected credit losses | 0 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 8 |  |  | 3
Fixed maturities, Available for sale, Gross Unrealized, Losses | 0 |  |  | (1)
Available for sale (AFS) fixed maturities | 195 |  |  | 172
Foreign government | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 8 |  |  | 2
Residential MBS |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 2,882 |  |  | 2,900
Fixed maturities, available for sale, allowance for expected credit losses | 3 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 264 |  |  | 265
Fixed maturities, Available for sale, Gross Unrealized, Losses | (6) |  |  | (5)
Available for sale (AFS) fixed maturities | 3,137 |  |  | 3,160
Residential MBS | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 258 |  |  | 260
Commercial MBS |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 814 |  |  | 896
Fixed maturities, available for sale, allowance for expected credit losses | 0 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 44 |  |  | 31
Fixed maturities, Available for sale, Gross Unrealized, Losses | (2) |  |  | 0
Available for sale (AFS) fixed maturities | 856 |  |  | 927
Commercial MBS | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 42 |  |  | 31
Collateralized loan obligations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 4,643 |  |  | 4,307
Fixed maturities, available for sale, allowance for expected credit losses | 20 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 25 |  |  | 10
Fixed maturities, Available for sale, Gross Unrealized, Losses | (41) |  |  | (37)
Collateralized loan obligations | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | (16) |  |  | (27)
Other asset-backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 7,405 |  |  | 6,992
Fixed maturities, available for sale, allowance for expected credit losses | 16 |  |  | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 154 |  |  | 156
Fixed maturities, Available for sale, Gross Unrealized, Losses | (124) |  |  | (20)
Available for sale (AFS) fixed maturities | 7,419 |  |  | 7,128
Other asset-backed securities | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 30 |  |  | 136
Corporate and other |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fixed maturities, available for sale, amortized cost | 23,005 |  |  | 22,456
Fixed maturities, available for sale, allowance for expected credit losses | 15 | $ 22 | $ 0 | 0
Fixed maturities, Available for sale, Gross Unrealized, Gains | 2,121 |  |  | 1,231
Fixed maturities, Available for sale, Gross Unrealized, Losses | (78) |  |  | (21)
Available for sale (AFS) fixed maturities | 25,033 |  |  | 23,666
Corporate and other | Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax | 2,043 |  |  | 1,210
Managed by third parties | Collateralized loan obligations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available for sale (AFS) fixed maturities | $ 4,607 |  |  | $ 4,280

X
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) 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 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost 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 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 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 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 Amount of allowance for credit loss 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 4: 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 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
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: |