v3.26.1
Accumulated Other Comprehensive Income - Components of and Changes in Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance $ 9,396 $ 9,669 $ 10,045 $ 10,028
Other comprehensive income (loss) before reclassifications (361) (492) 27 426
Amounts reclassified to net income 7 8 (34) (7)
Deferred income tax benefit (expense) 76 101 1 (89)
Ending balance 8,669 9,396 10,217 10,045
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 711 1,094 670 340
Ending balance 433 711 664 670
Change in Net Unrealized Investment Gains (Losses)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 213 880 461 154
Other comprehensive income (loss) before reclassifications (124) (853) 191 397
Amounts reclassified to net income 7 8 (34) (7)
Deferred income tax benefit (expense) 26 178 (30) (83)
Ending balance 122 213 588 461
Change in Discount Rate for Future Policy Benefits        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 303 159 256 279
Other comprehensive income (loss) before reclassifications (77) 183 (57) (35)
Amounts reclassified to net income 0 0 0 0
Deferred income tax benefit (expense) 16 (39) 4 12
Ending balance 242 303 203 256
Change in Instrument- Specific Credit Risk for Market Risk Benefits        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 128 (15) (147) (196)
Other comprehensive income (loss) before reclassifications (156) 182 (104) 68
Amounts reclassified to net income 0 0 0 0
Deferred income tax benefit (expense) 33 (39) 26 (19)
Ending balance 5 128 (225) (147)
Defined Benefit Pension Plan Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 67 70 100 103
Other comprehensive income (loss) before reclassifications (4) (4) (3) (4)
Amounts reclassified to net income 0 0 0 0
Deferred income tax benefit (expense) 1 1 1 1
Ending balance $ 64 $ 67 $ 98 $ 100