Investments - Schedule of Rollforward of Credit Loss Allowance for Bank Loans (Details) - Bank loans, net - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Beginning balance | $ (16) | $ (13) | $ (10) | $ (22) |
| Net (increases) decreases related to credit losses | (1) | 2 | (9) | 5 |
| Write-offs | 0 | 0 | 2 | 6 |
| Ending balance | $ (17) | $ (11) | $ (17) | $ (11) |