Investments (Details) - Narrative - PLRMBS - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| PLRMBS - Previous Credit Losses | $ 275 | $ 278 | |
| PLRMBS - Accretion or amortization in interest income associated with previous credit losses | $ 3 | $ 3 | |