Segment Information - Schedule of Reconciliation of Benefits and Expenses (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Segment Reporting Information [Line Items] | ||
| Total benefits and expenses | $ 3,302 | $ 3,767 |
| Corporate And Reconciling Items | ||
| Segment Reporting Information [Line Items] | ||
| Total operating benefits and expenses | 1,454 | 1,331 |
| Segment Reconciling Items | ||
| Segment Reporting Information [Line Items] | ||
| Net (gain) loss on market risk benefits | 1,670 | 2,246 |
| Benefits attributed to guaranteed benefit features | 60 | 62 |
| Amortization of DAC related to non-operating revenues and expenses | 121 | 128 |
| Cost of hedging | $ (3) | $ 0 |