Income Taxes - Assessment of Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Valuation Allowance [Line Items] | ||
| Valuation allowance related to certain tax attribute carryforward | $ 300 | |
| Valuation allowance | 1,051 | $ 1,650 |
| Increase (decrease) in deferred tax asset valuation allowance | 13 | |
| U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio | ||
| Valuation Allowance [Line Items] | ||
| Valuation allowance | 200 | |
| Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio | ||
| Valuation Allowance [Line Items] | ||
| Increase (decrease) in deferred tax asset valuation allowance | $ (309) |