v3.26.1
Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Balance, Beginning of Period $ 2,682 $ 849    
Other Comprehensive Income (Loss), before Reclassifications, before Tax (612) 396    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 145 76    
Other Comprehensive Income (Loss), Tax 99 83    
Balance, End of Period 2,314 1,238    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax 101 (8) $ 121 $ (19)
AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax [1] (6,466) (4,443) (4,807) (4,526)
AOCI, Liability for Future Policy Benefit, after Tax 8,680 5,702 7,372 5,412
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, after Tax 4 6 2 2
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax (5) (19) $ (6) $ (20)
Accumulated Translation Adjustment [Member]        
Other Comprehensive Income (Loss), before Reclassifications, before Tax (28) (4)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0    
Other Comprehensive Income (Loss), Tax 8 15    
Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Other Comprehensive Income (Loss), before Reclassifications, before Tax [1] (2,251) 27    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax [1] 143 76    
Other Comprehensive Income (Loss), Tax [1] (449) 20    
Accumulated Defined Benefit Plans Adjustment [Member]        
Other Comprehensive Income (Loss), before Reclassifications, before Tax 0 1    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 2 0    
Other Comprehensive Income (Loss), Tax (1) 0    
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent        
Other Comprehensive Income (Loss), before Reclassifications, before Tax 3 5    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0    
Other Comprehensive Income (Loss), Tax (1) (1)    
AOCI, Liability for Future Policy Benefit, Parent        
Other Comprehensive Income (Loss), before Reclassifications, before Tax 1,664 367    
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0    
Other Comprehensive Income (Loss), Tax $ 356 $ 77    
[1] Includes cash flow hedges of $(819) and $(748) as of March 31, 2026 and December 31, 2025, respectively, and $(485) and $(495) as of March 31, 2025 and December 31, 2024, respectively. See Note 11 – “Derivative Instruments” for additional information on cash flow hedges.