Deferred Policy Acquisition Costs and Value of Business Acquired - Reconciliation of DAC and VOBA (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| VOBA | $ 738 | $ 376 | $ 406 |
| Deferred policy acquisition costs ("DAC") and Value of business acquired ("VOBA") | 2,472 | 2,148 | |
| Retirement Deferred Group and Individual Annuity | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 702 | 701 | 695 |
| Health Solutions | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 223 | 215 | 193 |
| Businesses Exited | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 791 | 838 | $ 938 |
| Other | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | $ 18 | $ 18 |