Investments - Schedule of Rollforward of Credit Loss Allowance for Mortgage Loans (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Mortgage loans | ||||
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Beginning balance | $ (13) | $ (12) | $ (10) | $ (12) |
| Net decreases (increases) related to credit losses | 1 | (6) | (2) | (6) |
| Write-offs | 0 | 0 | 0 | 0 |
| Ending balance | (12) | (18) | (12) | (18) |
| Commercial | ||||
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Ending balance | (9) | (17) | (9) | (17) |
| Residential | ||||
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Ending balance | $ (3) | $ (1) | $ (3) | $ (1) |