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Shares And Stockholders' Equity (Components And Changes In Accumulated OCI) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Unrealized Gain (Loss) on AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year $ 6,777 $ 9,611 $ 5,983
Change in DAC, VOBA, DSI and DFEL 7,369 1,815 (3,569)
Income tax benefit (expense) 3,955 774 (970)
Less:      
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax (15) (9) (53)
Associated amortization of DAC, VOBA, DSI, and DFEL (12) (24) 32
Income tax benefit (expense) 6 7 4
Balance as of end-of-period (7,752) 6,777 9,611
Unrealized Gain (Loss) on AFS Securities [Member] | Gains (Losses) Arising During The Year [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes (25,552) (5,304) 7,925
Unrealized Gain (Loss) on AFS Securities [Member] | Change in Foreign Currency Exchange Rate Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes (322) (145) 180
Unrealized OTTI on AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year     45
Unrealized Gain (Loss) on Derivative Instruments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year (103) (402) (11)
Change in DAC, VOBA, DSI and DFEL 27 8 (17)
Income tax benefit (expense) (150) (87) 94
Less:      
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 92 26 48
Associated amortization of DAC, VOBA, DSI, and DFEL (6) (1) (1)
Income tax benefit (expense) (18) (5) (10)
Balance as of end-of-period 396 (103) (402)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Gains (Losses) Arising During The Year [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes 378 246 (257)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Change in Foreign Currency Exchange Rate Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes 312 152 (174)
Foreign Currency Translation Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year (14) (12) (17)
Less:      
Balance as of end-of-period (34) (14) (12)
Foreign Currency Translation Adjustment [Member] | Change in Foreign Currency Exchange Rate Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes (20) (2) 5
Funded Status of Employee Benefit Plans [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year (219) (266) (327)
Less:      
Income tax benefit (expense) 15 (9) (13)
Balance as of end-of-period (278) (219) (266)
Funded Status of Employee Benefit Plans [Member] | Gains (Losses) Arising During The Year [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) before reclassifications and taxes $ (74) $ 56 74
Cumulative Effect, Period of Adoption, Adjustment [Member] | Unrealized Gain (Loss) on AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year     45
Cumulative Effect, Period of Adoption, Adjustment [Member] | Unrealized OTTI on AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance as of beginning-of-year     $ (45)