v3.26.1
Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance $ 14,535 $ 14,434
Ending Balance 13,811 13,412
Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   (1,074)
Accumulated Other Comprehensive Income (Loss)    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (5,236) (5,994)
OCI before reclassifications (765) 1,669
Deferred income tax benefit (expense) 179 (387)
AOCI before reclassifications, net of income tax (5,822) (5,786)
Amounts reclassified from AOCI 327 (199)
Deferred income tax benefit (expense) (69) 43
Amounts reclassified from AOCI, net of income tax 258 (156)
Ending Balance (5,564) (5,942)
Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   (1,074)
Unrealized Investment Gains (Losses), Net of Related Offsets    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (5,226) (8,651)
OCI before reclassifications (2,395) 1,865
Deferred income tax benefit (expense) 494 (431)
AOCI before reclassifications, net of income tax (7,127) (7,147)
Amounts reclassified from AOCI 116 168
Deferred income tax benefit (expense) (24) (35)
Amounts reclassified from AOCI, net of income tax 92 133
Ending Balance (7,035) (7,014)
Unrealized Investment Gains (Losses), Net of Related Offsets | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   70
Unrealized Gains (Losses) on Derivatives    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (116) 959
OCI before reclassifications 173 184
Deferred income tax benefit (expense) (37) (39)
AOCI before reclassifications, net of income tax 20 1,104
Amounts reclassified from AOCI 208 (369)
Deferred income tax benefit (expense) (44) 78
Amounts reclassified from AOCI, net of income tax 164 (291)
Ending Balance 184 813
Unrealized Gains (Losses) on Derivatives | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   0
FPBs Discount Rate Remeasurement Gains (Losses)    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance 383 1,972
OCI before reclassifications 1,418 (357)
Deferred income tax benefit (expense) (270) 78
AOCI before reclassifications, net of income tax 1,531 549
Amounts reclassified from AOCI 0 0
Deferred income tax benefit (expense) 0 0
Amounts reclassified from AOCI, net of income tax 0 0
Ending Balance 1,531 549
FPBs Discount Rate Remeasurement Gains (Losses) | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   (1,144)
MRBs Instrument-Specific Credit Risk Remeasurement Gains (Losses)    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (51) (30)
OCI before reclassifications 47 33
Deferred income tax benefit (expense) (10) (7)
AOCI before reclassifications, net of income tax (14) (4)
Amounts reclassified from AOCI 0 0
Deferred income tax benefit (expense) 0 0
Amounts reclassified from AOCI, net of income tax 0 0
Ending Balance (14) (4)
MRBs Instrument-Specific Credit Risk Remeasurement Gains (Losses) | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   0
Foreign Currency Translation Adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (76) (111)
OCI before reclassifications (9) (55)
Deferred income tax benefit (expense) 2 12
AOCI before reclassifications, net of income tax (83) (154)
Amounts reclassified from AOCI 0 0
Deferred income tax benefit (expense) 0 0
Amounts reclassified from AOCI, net of income tax 0 0
Ending Balance (83) (154)
Foreign Currency Translation Adjustments | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   0
Defined Benefit Plans Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance (150) (133)
OCI before reclassifications 1 (1)
Deferred income tax benefit (expense) 0 0
AOCI before reclassifications, net of income tax (149) (134)
Amounts reclassified from AOCI 3 2
Deferred income tax benefit (expense) (1) 0
Amounts reclassified from AOCI, net of income tax 2 2
Ending Balance $ (147) (132)
Defined Benefit Plans Adjustment | Cumulative Effect, Period of Adoption, Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning Balance   $ 0