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Equity - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance $ 30,125 $ 50,013 $ 74,817
Ending Balance 30,253 30,125 50,013
Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance 27,287 67,749 74,817
Ending Balance   27,287 67,749
Cumulative Effect, Period of Adoption, Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     (22,424)
Cumulative Effect, Period of Adoption, Adjustment | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     0
Accumulated Other Comprehensive Income (Loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance (22,621) (2,451) 18,072
OCI before reclassifications 2,340 (28,577) (3,542)
Deferred income tax benefit (expense) (505) 6,261 494
AOCI before reclassifications, net of income tax (20,786) (24,767) (2,733)
Amounts reclassified from AOCI 1,937 2,198 216
Deferred income tax benefit (expense) (393) (463) (27)
Amounts reclassified from AOCI, net of income tax 1,544 1,735 189
Ending Balance (19,242) (22,621) (2,451)
Accumulated Other Comprehensive Income (Loss) | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance (27,083) 10,919 18,072
Ending Balance   (27,083) 10,919
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     (17,757)
Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjustment | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     0
Unrealized Investment Gains (Losses), Net of Related Offsets      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance (22,646) 20,919  
OCI before reclassifications 7,820 (58,093) (12,498)
Deferred income tax benefit (expense) (1,666) 13,298 2,961
AOCI before reclassifications, net of income tax (16,492) (23,876) 21,183
Amounts reclassified from AOCI 2,523 1,607 (125)
Deferred income tax benefit (expense) (537) (368) 29
Amounts reclassified from AOCI, net of income tax 1,986 1,239 (96)
Ending Balance (14,506) (22,646) 20,919
Unrealized Investment Gains (Losses), Net of Related Offsets | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     22,217
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     8,503
Unrealized Gains (Losses) on Derivatives      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance 1,557 1,629  
OCI before reclassifications (1,106) (583) (113)
Deferred income tax benefit (expense) 267 89 18
AOCI before reclassifications, net of income tax 718 1,135 1,418
Amounts reclassified from AOCI (705) 498 250
Deferred income tax benefit (expense) 170 (76) (39)
Amounts reclassified from AOCI, net of income tax (535) 422 211
Ending Balance 183 1,557 1,629
Unrealized Gains (Losses) on Derivatives | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     1,513
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
Future Policy Benefits Discount Rate Remeasurement Gains (Losses)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance 6,115 (18,559)  
OCI before reclassifications (4,361) 31,755 10,102
Deferred income tax benefit (expense) 904 (7,116) (2,331)
AOCI before reclassifications, net of income tax 2,658 6,080 (18,559)
Amounts reclassified from AOCI 0 0 0
Deferred income tax benefit (expense) 0 0 0
Amounts reclassified from AOCI, net of income tax 0 0 0
Ending Balance 2,658 6,115 (18,559)
Future Policy Benefits Discount Rate Remeasurement Gains (Losses) | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     0
Future Policy Benefits 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     (26,330)
Market Risk Benefits Instrument-Specific Credit Risk Remeasurement Gains(Losses)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance 107 279  
OCI before reclassifications (102) (219) 257
Deferred income tax benefit (expense) 22 47 (54)
AOCI before reclassifications, net of income tax 27 107 279
Amounts reclassified from AOCI 0 0 0
Deferred income tax benefit (expense) 0 0 0
Amounts reclassified from AOCI, net of income tax 0 0 0
Ending Balance 27 107 279
Market Risk Benefits Instrument-Specific Credit Risk Remeasurement Gains(Losses) | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     0
Market Risk Benefits 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     76
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance (6,377) (5,121)  
OCI before reclassifications 296 (1,625) (1,527)
Deferred income tax benefit (expense) (77) (18) (54)
AOCI before reclassifications, net of income tax (6,158) (6,764) (5,382)
Amounts reclassified from AOCI 0 0 0
Deferred income tax benefit (expense) 0 0 0
Amounts reclassified from AOCI, net of income tax 0 0 0
Ending Balance (6,158) (6,377) (5,121)
Foreign Currency Translation Adjustments | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     (3,795)
Foreign Currency Translation Adjustments | Cumulative Effect, Period of Adoption, Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     (6)
Defined Benefit Plans Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance (1,377) (1,598)  
OCI before reclassifications (207) 188 237
Deferred income tax benefit (expense) 45 (39) (46)
AOCI before reclassifications, net of income tax (1,539) (1,449) (1,672)
Amounts reclassified from AOCI 119 93 91
Deferred income tax benefit (expense) (26) (19) (17)
Amounts reclassified from AOCI, net of income tax 93 74 74
Ending Balance $ (1,446) (1,377) (1,598)
Defined Benefit Plans Adjustment | Previously Reported      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning Balance     (1,863)
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
Disposal Group, Held-for-Sale or Disposed of by Sale | Accumulated Other Comprehensive Income (Loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   411 93
Disposal Group, Held-for-Sale or Disposed of by Sale | Unrealized Investment Gains (Losses), Net of Related Offsets      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   (9) (168)
Disposal Group, Held-for-Sale or Disposed of by Sale | Unrealized Gains (Losses) on Derivatives      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   0 0
Disposal Group, Held-for-Sale or Disposed of by Sale | Future Policy Benefits Discount Rate Remeasurement Gains (Losses)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   35 0
Disposal Group, Held-for-Sale or Disposed of by Sale | Market Risk Benefits Instrument-Specific Credit Risk Remeasurement Gains(Losses)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   0 0
Disposal Group, Held-for-Sale or Disposed of by Sale | Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   387 261
Disposal Group, Held-for-Sale or Disposed of by Sale | Defined Benefit Plans Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCI, net of income tax   $ (2) $ 0