v3.24.2.u1
Equity - Rollforward of accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period $ 12,386 $ 12,465 $ 12,635 $ 10,319
Change in unrealized depreciation of investments   (1,772) (2,237) 2,248
Change in fair value of market risk benefits attributable to changes in our own credit risk 202 (240) 173 (146)
Change in discount rates assumptions of certain liabilities 472 628 1,167 33
Change in future policy benefits and other 86 49 (41) (67)
Change in cash flow hedges (3) (8) (28) (15)
Change in foreign currency translation adjustments 70 28 66 65
Change in net actuarial loss       3
Change in deferred tax asset (liability) (35) 201 (114) (430)
Other comprehensive income (loss) (370) (1,114) (1,014) 1,691
Balance, end of period 11,812 11,468 11,812 11,468
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (14,139) (14,067) (13,458) (16,863)
Change in unrealized depreciation of investments (1,162)      
Other comprehensive income (loss) (369) (1,115) (1,012) 1,681
Balance, end of period (14,508) (15,182) (14,508) (15,182)
Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which allowance for credit losses was Taken        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (44) (62) (79) (92)
Other comprehensive income (loss) (9) 43 26 73
Balance, end of period (53) (19) (53) (19)
Unrealized Appreciation (Depreciation) of All Other Investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (15,865) (16,248) (14,650) (19,380)
Other comprehensive income (loss) (967) (1,484) (2,143) 1,648
Other     (39)  
Balance, end of period (16,832) (17,732) (16,832) (17,732)
Change in fair value of market risk benefits attributable to changes in our own credit risk        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (932) (291) (909) (365)
Other comprehensive income (loss) 159 (189) 136 (115)
Balance, end of period (773) (480) (773) (480)
Change in unrealized depreciation of investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in unrealized depreciation of investments (1,150) (1,827)    
Change in future policy benefits and other 86 49    
Change in deferred tax asset (liability) 97 294    
Other comprehensive income (loss) (967) (1,484) (2,143) 1,648
Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 2,638 2,443 2,095 2,908
Other comprehensive income (loss) 379 486 922 21
Balance, end of period 3,017 2,929 3,017 2,929
Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 127 153 146 157
Other comprehensive income (loss) (2) (6) (22) (10)
Other     1  
Balance, end of period 125 147 125 147
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (65) (73) (63) (100)
Other comprehensive income (loss) 70 36 67 72
Balance, end of period 6 (38) 6 (38)
Retirement Plan Liabilities Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 2 11 2 9
Other comprehensive income (loss) 0 0 0 2
Balance, end of period 2 11 2 11
Noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other     (38)  
Noncontrolling interests (1) 1 (2) 10
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Noncontrolling interests (1) 1 (2) 10
Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which allowance for credit losses was Taken        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in unrealized depreciation of investments (12) 55 33 93
Change in future policy benefits and other     0  
Change in deferred tax asset (liability) 3 (12) (7) (20)
Other comprehensive income (loss) (9) 43 26 73
Change in fair value of market risk benefits attributable to changes in our own credit risk        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in fair value of market risk benefits attributable to changes in our own credit risk 202 (240) 173 (146)
Change in deferred tax asset (liability) (43) 51 (37) 31
Other comprehensive income (loss) 159 (189) 136 (115)
Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in discount rates assumptions of certain liabilities 472 628 1,167 33
Change in deferred tax asset (liability) (93) (142) (245) (12)
Other comprehensive income (loss) 379 486 922 21
Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in cash flow hedges (3) (8) (28) (15)
Change in deferred tax asset (liability) 1 2 6 5
Other comprehensive income (loss) (2) (6) (22) (10)
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in foreign currency translation adjustments 70 28 66 65
Change in deferred tax asset (liability) 0 8 1 7
Other comprehensive income (loss) 70 36 67 72
Retirement Plan Liabilities Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in net actuarial loss       3
Change in deferred tax asset (liability) 0 0 0 (1)
Other comprehensive income (loss) $ 0 $ 0 0 2
Unrealized Appreciation (Depreciation) of All Other Investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in unrealized depreciation of investments     (2,270) 2,155
Change in future policy benefits and other     (41) (67)
Change in deferred tax asset (liability)     $ 168 $ (440)