Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax | $ (1,500) | $ (1,584) | |
| AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax | 4 | 3 | |
| Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax | (269) | (292) | |
| Deferred income tax asset(2) | 499 | 522 | |
| Accumulated Other Comprehensive Income (Loss), Unrealized Capital Gains (Losses), Adjustment, Net of Tax | (1,266) | (1,351) | |
| Pension and other postretirement benefits liability, net of tax | 1 | 1 | |
| Accumulated other comprehensive income (loss) | (1,265) | $ (1,134) | $ (1,350) |
| Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | $ 0 |
| X | ||||||||||
- Definition Amount, after tax, of accumulated 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). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Accumulated Other Comprehensive Income (Loss), Tax Expense (Benefit) No definition available.
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- Definition Accumulated Other Comprehensive Income (Loss), Unrealized Capital Gains (Losses), Adjustment, Net of Tax No definition available.
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