Deferred Policy Acquisition Costs and Value of Business Acquired - Reconciliation of DAC and VOBA (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| VOBA | $ 697 | $ 710 | $ 376 |
| Deferred policy acquisition costs ("DAC") and Value of business acquired ("VOBA") | 2,364 | 2,401 | |
| Retirement Deferred Group and Individual Annuity | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 708 | 706 | 701 |
| Health Solutions | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 217 | 221 | 215 |
| Businesses Exited | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | 722 | 744 | $ 838 |
| Other | |||
| Deferred Acquisition Cost and Value of Business Acquired [Line Items] | |||
| DAC | $ 20 | $ 20 |