v3.25.4
Equity - Rollforward of accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period $ 12,326 $ 12,635 $ 10,319
Change in deferred tax asset (liability)     (508)
Other comprehensive income (loss) 4,230 (177) 3,416
Balance, end of period 13,960 12,326 12,635
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (13,681) (13,458) (16,863)
Other comprehensive income (loss) 4,229 (185) 3,405
Balance, end of period (9,452) (13,681) (13,458)
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 (43) (79) (92)
Other comprehensive income (loss)     13
Balance, end of period (29) (43) (79)
Unrealized Appreciation (Depreciation) of All Other Investments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (16,229) (14,650) (19,380)
Other comprehensive income (loss)     4,730
Balance, end of period (11,656) (16,229) (14,650)
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 (690) (909) (365)
Other comprehensive income (loss)     (544)
Balance, end of period (1,116) (690) (909)
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 3,342 2,095 2,908
Other comprehensive income (loss)     (813)
Balance, end of period 3,250 3,342 2,095
Cash flow hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (46) 146 157
Other comprehensive income (loss)     (11)
Balance, end of period 66 (46) 146
Foreign currency translation adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (17) (63) (100)
Other comprehensive income (loss)     48
Balance, end of period 31 (17) (63)
Retirement plan liabilities adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 2 2 9
Other comprehensive income (loss)     (7)
Balance, end of period 2 2 2
Noncontrolling interests      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Noncontrolling interests 1 8 11
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Noncontrolling interests 1 8 11
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 5,750 (1,631) 5,990
Change in fair value of market risk benefits attributable to changes in our own credit risk (545) 280 (695)
Change in discount rates assumptions of certain liabilities (116) 1,570 (1,029)
Change in future policy benefits and other (74) (60) (358)
Change in cash flow hedges 144 (246) (16)
Change in foreign currency translation adjustments 56 65 39
Change in net actuarial loss     (7)
Change in deferred tax asset (liability) (985) (155) (508)
Other comprehensive income (loss) 4,230 (177) 3,416
Other   (38)  
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 17 46 28
Change in future policy benefits and other 0   (11)
Change in deferred tax asset (liability) (3) (10) (4)
Other comprehensive income (loss) 14 36 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 5,733 (1,677) 5,962
Change in future policy benefits and other (74) (60) (347)
Change in deferred tax asset (liability) (1,086) 197 (885)
Other comprehensive income (loss) 4,573 (1,540) 4,730
Other   (39)  
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 (545) 280 (695)
Change in deferred tax asset (liability) 119 (61) 151
Other comprehensive income (loss) (426) 219 (544)
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 (116) 1,570 (1,029)
Change in deferred tax asset (liability) 24 (323) 216
Other comprehensive income (loss) (92) 1,247 (813)
Cash flow hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in cash flow hedges 144 (246) (16)
Change in deferred tax asset (liability) (32) 53 5
Other comprehensive income (loss) 112 (193) (11)
Other   1  
Foreign currency translation adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in foreign currency translation adjustments 56 65 39
Change in deferred tax asset (liability) (7) (11) 9
Other comprehensive income (loss) 49 54 48
Retirement Plan Liabilities Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in net actuarial loss     (7)
Change in deferred tax asset (liability) 0 0 0
Other comprehensive income (loss) $ 0 $ 0 $ (7)