v3.26.1
Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) $ (5,355) $ (4,885)
Net investment gains (losses) (670) (387)
Gain (Loss) on Derivative Instruments, Net, Pretax (74) (432)
Policyholder Benefits and Claims Incurred, Net (11,864) (11,806)
Interest credited to PABs (1,674) (1,647)
Operating Expenses 3,798 3,350
Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (16) 17
Derivative, Gain (Loss) on Derivative, Net 253 (335)
Operating Expenses 0 0
Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Net investment gains (losses) 0 (1)
Policyholder Benefits and Claims Incurred, Net (4) (4)
Interest credited to PABs 0 (2)
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax 66  
Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (2) (19)
Net investment gains (losses) (8) 2
Derivative, Gain (Loss) on Derivative, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax 685 (145)
Net Investment Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment gains (losses) 0 0
Other Comprehensive Income (Loss), before Tax 72 (86)
Foreign Exchange Forward [Member] | Net Investment Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax   (72)
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment gains (losses) 0 0
Other Comprehensive Income (Loss), before Tax 68  
Interest rate contracts | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (1) (17)
Net investment gains (losses) 1 0
Derivative, Gain (Loss) on Derivative, Net 0 0
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax (2) (17)
Credit forwards [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Net investment gains (losses) 0 0
Derivative, Gain (Loss) on Derivative, Net 0 0
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax 0 0
Currency Swap [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (1) (2)
Net investment gains (losses) (249) 360
Derivative, Gain (Loss) on Derivative, Net 0 0
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax 248 (362)
Derivative [Member] | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Net investment gains (losses) 0 (3)
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Derivative [Member] | Interest rate swaps | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 (1)
Net investment gains (losses) 0 0
Policyholder Benefits and Claims Incurred, Net 6 (75)
Interest credited to PABs (14) (42)
Operating Expenses 0 0
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (24) 10
Net investment gains (losses) 0 8
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs (7) (36)
Operating Expenses 0 0
Debt Securities [Member] | Interest rate swaps | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 (1)
Net investment gains (losses) 0 0
Policyholder Benefits and Claims Incurred, Net 2 (79)
Interest credited to PABs (14) (40)
Operating Expenses 0 0
Debt Securities [Member] | Currency Swap [Member] | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (24) (10)
Net investment gains (losses) 0 (6)
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs (7) (36)
Operating Expenses 0 0
Non-derivative [Domain] [Member] | Net Investment Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax 4 (14)
Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Net investment gains (losses) 240 (358)
Derivative, Gain (Loss) on Derivative, Net 0 0
Policyholder Benefits and Claims Incurred, Net 0 0
Interest credited to PABs 0 0
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax 0 0
Accumulated Other Comprehensive Income (Loss) | Credit forwards [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax 0 0
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax 449 121
Accumulated Other Comprehensive Income (Loss) | Derivative [Member] | Fair Value Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax 66  
Accumulated Other Comprehensive Income (Loss) | Interest rate swaps | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), before Tax (10) 113
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Derivative, Gain (Loss) on Derivative, Net 45 (245)
Credit derivatives — purchased | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Derivative, Gain (Loss) on Derivative, Net (5) 9
Credit derivatives — written | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Derivative, Gain (Loss) on Derivative, Net 62 27
Equity Market Risk [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (16) 17
Derivative, Gain (Loss) on Derivative, Net 51 (59)
Interest Rate Risk [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Derivative, Gain (Loss) on Derivative, Net 92 (98)
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) 0 0
Derivative, Gain (Loss) on Derivative, Net 8 31
Net Derivative Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (87) (95)
Net investment gains (losses) 0 0
Gain (Loss) on Derivative Instruments, Net, Pretax (100) (110)
Policyholder Benefits and Claims Incurred, Net (7) (2)
Interest credited to PABs (39) (40)
Other Comprehensive Income (Loss), before Tax 0 0
Net Embedded Derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Derivative Instruments, Net, Pretax (191) 35
Synthetic GICs [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Derivative Instruments, Net, Pretax (19) (19)
Embedded derivatives - other    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Derivative Instruments, Net, Pretax (17) (3)
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Net investment income (1) (105) (131)
Net investment gains (losses) (8) 1
Derivative, Gain (Loss) on Derivative, Net (74)  
Gain (Loss) on Derivative Instruments, Net, Pretax   (432)
Policyholder Benefits and Claims Incurred, Net (3) 2
Interest credited to PABs 39 38
Operating Expenses 0 0
Other Comprehensive Income (Loss), before Tax $ 823 $ (231)