Separate Account Assets and Liabilities - Schedule of Aggregate Fair Value of Assets, by Major Investment Asset Category (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | $ 237,319 | $ 236,496 |
| Total Variable Annuities | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | 237,222 | 236,406 |
| Equity | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | 173,214 | 171,046 |
| Bond | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | 18,613 | 19,711 |
| Balanced | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | 42,893 | 43,317 |
| Money Market | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | 2,502 | 2,332 |
| Other Product Lines | ||
| Fair Value, Separate Account Investment [Line Items] | ||
| Separate account assets | $ 97 | $ 90 |