v3.26.1
Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net investment gains (losses) $ (225) $ (285)
Net derivative gains (losses) 400 (46)
Net investment income 3,100 2,876
Income (loss) before provision for income tax 1,055 386
Income tax (expense) benefit (199) (51)
Net income (loss) 856 335
Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net income (loss) (258) 156
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Investment Gains (Losses), Net of Related Offsets    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net investment gains (losses) (122) (162)
Net derivative gains (losses) 6 (6)
Income (loss) before provision for income tax (116) (168)
Income tax (expense) benefit 24 35
Net income (loss) (92) (133)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income (loss) before provision for income tax (208) 369
Income tax (expense) benefit 44 (78)
Net income (loss) (164) 291
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Interest rate contracts    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net investment gains (losses) 1 0
Net investment income 1 20
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Foreign currency swaps    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net investment gains (losses) (211) 348
Net investment income 1 1
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Plans Adjustment    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of net actuarial gains (losses) (3) (2)
Amortization of prior service (costs) credit 0 0
Income (loss) before provision for income tax (3) (2)
Income tax (expense) benefit 1 0
Net income (loss) $ (2) $ (2)