v3.26.1
Equity - Rollforward of accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period $ 11,541 $ 12,836 $ 13,960 $ 12,326
Other comprehensive income (loss) 261 1,417 (715) 3,049
Less: Noncontrolling interests 0 1 0 1
Balance, end of period 11,373 13,169 11,373 13,169
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (10,428) (12,049) (9,452) (13,681)
Other comprehensive income (loss) 261 1,416 (715) 3,048
Balance, end of period (10,167) (10,633) (10,167) (10,633)
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 (63) (30) (29) (43)
Other comprehensive income (loss) 26 13    
Balance, end of period (37) (17) (37) (17)
Unrealized appreciation (depreciation) of all Other Investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period (13,684) (14,745) (11,656) (16,229)
Other comprehensive income (loss) 733 1,262    
Balance, end of period (12,951) (13,483) (12,951) (13,483)
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 (645) (737) (1,116) (690)
Other comprehensive income (loss) (208) 13    
Balance, end of period (853) (724) (853) (724)
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 3,905 3,382 3,250 3,342
Other comprehensive income (loss) (201) 47    
Balance, end of period 3,704 3,429 3,704 3,429
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 26 91 66 (46)
Other comprehensive income (loss) (85) 45    
Balance, end of period (59) 136 (59) 136
Foreign currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 31 (12) 31 (17)
Other comprehensive income (loss) (4) 37    
Balance, end of period 27 24 27 24
Retirement plan liabilities adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance, beginning of period 2 2 2 2
Other comprehensive income (loss) 0 0    
Balance, end of period 2 2 2 2
Noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Less: Noncontrolling interests 0 1 0 1
Foreign Currency Translation Adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Less: Noncontrolling interests 0 1 0 1
AOCI Including Portion Attributable to Noncontrolling Interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in unrealized appreciation (depreciation) of investments 1,045 1,585 (1,517) 3,604
Change in fair value of market risk benefits attributable to changes in our own credit risk (266) 16 335 (44)
Change in discount rates assumptions of certain liabilities (256) 60 581 110
Change in future policy benefits and other (21) (1) 29 (33)
Change in cash flow hedges (108) 57 (160) 232
Change in foreign currency translation adjustments (4) 41 (4) 46
Change in deferred tax asset (liability) (129) (341) 21 (866)
Other comprehensive income (loss) 261 1,417 (715) 3,049
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 appreciation (depreciation) of investments 33 17 (10) 33
Change in future policy benefits and other 0   0  
Change in deferred tax asset (liability) (7) (4) 2 (7)
Other comprehensive income (loss) 26 13 (8) 26
Unrealized Appreciation (Depreciation) of All Other Investments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in unrealized appreciation (depreciation) of investments 1,012 1,568 (1,507) 3,571
Change in future policy benefits and other (21) (1) 29 (33)
Change in deferred tax asset (liability) (258) (305) 183 (792)
Other comprehensive income (loss) 733 1,262 (1,295) 2,746
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 (266) 16 335 (44)
Change in deferred tax asset (liability) 58 (3) (72) 10
Other comprehensive income (loss) (208) 13 263 (34)
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 (256) 60 581 110
Change in deferred tax asset (liability) 55 (13) (127) (23)
Other comprehensive income (loss) (201) 47 454 87
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in cash flow hedges (108) 57 (160) 232
Change in deferred tax asset (liability) 23 (12) 35 (50)
Other comprehensive income (loss) (85) 45 (125) 182
Foreign currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Change in foreign currency translation adjustments (4) 41 (4) 46
Change in deferred tax asset (liability) 0 (4) 0 (4)
Other comprehensive income (loss) $ (4) $ 37 (4) 42
Retirement Plan Liabilities Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss)     $ 0 $ 0