XML 76 R58.htm IDEA: XBRL DOCUMENT
v3.25.2

Investments - Schedule of Change in Unrealized Net Capital Gains (Losses) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses |  |  | $ 1,032 |
Amounts recognized for: |  |  |  |
Reclassification of noncontrolling interest |  |  | (3) |
Deferred income taxes |  |  | (222) |
Change in unrealized net capital gains and losses, after-tax | $ 387 | $ (119) | 807 | $ (334)
Investments classified as held for sale |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses |  |  | 111 |
Fixed income securities |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses |  |  | 921 |
Short-term investments |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses |  |  | 0 |
Derivative instruments |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses |  |  | $ 0 |

X
- References No definition available. + Details
Name: | all_AmountRecognizedInUnrealizedNetCapitalGainsAndLossesAbstract
Namespace Prefix: | all_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in Reclassification Of Noncontrolling Interests Impact on Accumulated Other Comprehensive Income + References No definition available. + Details
Name: | all_ChangeInReclassificationOfNoncontrollingInterestsImpactOnAccumulatedOtherComprehensiveIncome
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | all_ChangeInUnrealizedGainLossRecognizedInAccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix: | all_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net of tax amount of the appreciation (loss) in the value of unsold available-for-sale securities. Includes amounts related to other than temporary impairment (OTTI) losses. + References No definition available. + Details
Name: | all_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesIncludingOtherThanTemporaryImpairmentLossesAdjustmentNetOfTax
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax and after adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after adjustment, of tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-12 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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