Fair Value of Financial Instruments - Schedule of Mortgage Loans With Election of Fair Value Option (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair value | $ 232 | $ 288 |
| Commercial | ||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Fair value | 232 | 288 |
| Aggregate contractual principal | $ 263 | $ 326 |