v3.26.1
Equity - Rollforward 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]    
Balance, beginning of period $ 13,960 $ 12,326
Total other comprehensive income (loss) (976) 1,632
Balance, end of period 11,541 12,836
Total    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period (9,452) (13,681)
Total other comprehensive income (loss) (976) 1,632
Balance, end of period (10,428) (12,049)
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]    
Balance, beginning of period (29) (43)
Total other comprehensive income (loss) (34) 13
Balance, end of period (63) (30)
Unrealized appreciation (depreciation) of all Other Investments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period (11,656) (16,229)
Total other comprehensive income (loss) (2,028) 1,484
Balance, end of period (13,684) (14,745)
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 (1,116) (690)
Total other comprehensive income (loss) 471 (47)
Balance, end of period (645) (737)
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 3,250 3,342
Total other comprehensive income (loss) 655 40
Balance, end of period 3,905 3,382
Cash flow hedges    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period 66 (46)
Total other comprehensive income (loss) (40) 137
Balance, end of period 26 91
Foreign currency translation adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period 31 (17)
Total other comprehensive income (loss) 0 5
Balance, end of period 31 (12)
Retirement plan liabilities adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period 2 2
Total other comprehensive income (loss) 0 0
Balance, end of period 2 2
Noncontrolling interests    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Less: Noncontrolling interests 0 0
Foreign Currency Translation Adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Less: Noncontrolling interests 0 0
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 (2,562) 2,019
Change in fair value of market risk benefits attributable to changes in our own credit risk 601 (60)
Change in discount rates assumptions of certain liabilities 837 50
Change in future policy benefits and other 50 (32)
Change in cash flow hedges (52) 175
Change in foreign currency translation adjustments 0 5
Change in deferred tax asset (liability) 150 (525)
Total other comprehensive income (loss) (976) 1,632
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 (43) 16
Change in future policy benefits and other 0  
Change in deferred tax asset (liability) 9 (3)
Total other comprehensive income (loss) (34) 13
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 (2,519) 2,003
Change in future policy benefits and other 50 (32)
Change in deferred tax asset (liability) 441 (487)
Total other comprehensive income (loss) (2,028) 1,484
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 601 (60)
Change in deferred tax asset (liability) (130) 13
Total other comprehensive income (loss) 471 (47)
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 837 50
Change in deferred tax asset (liability) (182) (10)
Total other comprehensive income (loss) 655 40
Cash flow hedges    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Change in cash flow hedges (52) 175
Change in deferred tax asset (liability) 12 (38)
Total other comprehensive income (loss) (40) 137
Foreign currency translation adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Change in foreign currency translation adjustments 0 5
Change in deferred tax asset (liability) 0 0
Total other comprehensive income (loss) $ 0 $ 5