v3.23.1
Equity and Redeemable Noncontrolling Interest - Rollforward of Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period $ 28,989 $ 39,781 $ 33,679
Change in unrealized depreciation of investments (40,401) (7,457) 8,895
Change in deferred policy acquisition costs adjustment and other 6,746 1,719 (1,183)
Change in future policy benefits 1,822 458 (870)
Change in cash flow hedges 203    
Change in foreign currency translation adjustments (109) (22) 61
Change in net actuarial loss 2 1 (2)
Change in deferred tax asset (liability) 4,996 984 (1,571)
Other comprehensive income (loss) (25,106) (4,091) 5,330
Other   20  
Balance, end of period 10,319 28,989 39,781
Market Risk Benefit, Change in Fair Value, Gain (Loss), Net 1,635 226  
Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   (1,157) (246)
Balance, end of period     (1,157)
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 8,233 14,653 9,329
Other comprehensive income (loss) (25,096) (4,091) 5,324
Balance, end of period (16,863) 8,233 14,653
Total | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   (2,349)  
Balance, end of period     (2,349)
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 (31) (62) 0
Other comprehensive income (loss) (61) 31 (62)
Balance, end of period (92) (31) (62)
Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which allowance for credit losses was Taken | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   0  
Balance, end of period     0
Unrealized Appreciation (Depreciation) of All Other Investments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 12,315 14,698 9,361
Other comprehensive income (loss) (31,695) (5,638) 5,337
Other   20  
Balance, end of period (19,380) 12,315 14,698
Unrealized Appreciation (Depreciation) of All Other Investments | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   3,235  
Balance, end of period     3,235
Cash Flow Hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Other comprehensive income (loss) 157    
Balance, end of period 157    
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (9) 11 (40)
Other comprehensive income (loss) (101) (20) 57
Balance, end of period (100) (9) 11
Foreign Currency Translation Adjustments | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   0  
Balance, end of period     0
Retirement Plan Liabilities Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 7 6 8
Other comprehensive income (loss) 2 1 (2)
Balance, end of period 9 7 6
Retirement Plan Liabilities Adjustment | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   0  
Balance, end of period     0
Noncontrolling interests      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Noncontrolling interests (10) 0 6
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Noncontrolling interests (10) 0 6
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 (78) 39 (89)
Change in deferred policy acquisition costs adjustment and other     11
Change in deferred tax asset (liability) 17 (8) 16
Other comprehensive income (loss) (61) 31 (62)
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 (40,323) (7,496) 8,984
Change in deferred policy acquisition costs adjustment and other     (1,194)
Change in future policy benefits 1,822 458 (870)
Change in deferred tax asset (liability) 6,806 1,400 (1,583)
Other comprehensive income (loss) (31,695) (5,638) 5,337
Cash Flow Hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in cash flow hedges 203    
Change in deferred tax asset (liability) (46)    
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in foreign currency translation adjustments (109) (22) 61
Change in deferred tax asset (liability) 8 2 (4)
Other comprehensive income (loss) (101) (20) 57
Retirement Plan Liabilities Adjustment      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in net actuarial loss 2 1 (2)
Other comprehensive income (loss) 2 1 (2)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Portion Attributable To Noncontrolling Interest      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in deferred tax asset (liability) (341) (47)  
Other comprehensive income (loss) 1,294 179 0
Market Risk Benefit, Change in Fair Value, Gain (Loss), Net 1,635 226  
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Portion Attributable To Noncontrolling Interest | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   (1,838)  
Balance, end of period     (1,838)
AOCI, Market Risk Benefit, Change In Discount Rates, Including Noncontrolling Interest      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Change in deferred policy acquisition costs adjustment and other 6,746 1,719  
Change in deferred tax asset (liability) (1,448) (363)  
Other comprehensive income (loss) 5,298 1,356 0
AOCI, Market Risk Benefit, Change In Discount Rates, Including Noncontrolling Interest | Cumulative effect of change in accounting principle      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   (3,746)  
Balance, end of period     (3,746)
Change In Fair Value Of Market Risk Benefits Attributable To Changes In The Instrument- Specific Risk, Parent      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (1,659)   0
Other comprehensive income (loss) 1,294 179  
Balance, end of period (365) (1,659)  
AOCI, Market Risk Benefit, Change In Discount Rates, Parent      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (2,390)   $ 0
Other comprehensive income (loss) 5,298 1,356  
Balance, end of period $ 2,908 $ (2,390)