Reinsurance - Narrative (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Jan. 02, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Insurance [Abstract] | |||
| Contract owner account balance uncer coinsurance | $ 3,800 | ||
| Separate accounts liability under coinsurance | $ 20,600 | ||
| Deposit asset | $ 1,000 | $ 1,100 | |
| Funds withheld, funds held under reinsurance agreements, liability, direct | 103 | ||
| Funds held under reinsurance agreements, liability, assumed | $ 900 |