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Shares And Stockholders' Equity (Components And Changes In Accumulated OCI) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Unrealized Gain (Loss) on AFS Securities [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance as of beginning-of-year | $ 9,611 | $ 5,983 | $ 557
Change in DAC, VOBA, DSI and DFEL | 1,815 | (3,569) | (2,462)
Income tax benefit (expense) | 774 | (970) | (1,457)
Less: |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | (9) | (53) | (28)
Associated amortization of DAC, VOBA, DSI, and DFEL | (24) | 32 | (12)
Income tax benefit (expense) | 7 | 4 | 8
Decreases attributable to |  |  |
Balance as of end-of-period | 6,777 | 9,611 | 5,983
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 | (5,304) | 7,925 | 9,267
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 | (145) | 180 | 46
Unrealized OTTI on AFS Securities [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance as of beginning-of-year |  | 45 | 33
(Increases) attributable to: |  |  |
Gross OTTI recognized in OCI during the period |  |  | (16)
Change in DAC, VOBA, DSI and DFEL |  |  | 1
Income tax benefit (expense) |  |  | (3)
Decreases attributable to |  |  |
Changes in fair value, sales, maturities or other settlements of AFS securities |  |  | 31
Change in DAC, VOBA, DSI, and DFEL |  |  | (1)
Income tax benefit (expense) |  |  | (6)
Balance as of end-of-period |  |  | 45
Unrealized Gain (Loss) on Derivative Instruments [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance as of beginning-of-year | (402) | (11) | 139
Change in DAC, VOBA, DSI and DFEL | 8 | (17) | (4)
Income tax benefit (expense) | (87) | 94 | 31
Less: |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 26 | 48 | 42
Associated amortization of DAC, VOBA, DSI, and DFEL | (1) | (1) | (1)
Income tax benefit (expense) | (5) | (10) | (9)
Decreases attributable to |  |  |
Balance as of end-of-period | (103) | (402) | (11)
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 | 246 | (257) | (93)
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 | 152 | (174) | (52)
Foreign Currency Translation Adjustment [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance as of beginning-of-year | (12) | (17) | (23)
Decreases attributable to |  |  |
Balance as of end-of-period | (14) | (12) | (17)
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 | (2) | 5 | 6
Funded Status of Employee Benefit Plans [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance as of beginning-of-year | (266) | (327) | (299)
Income tax benefit (expense) | (9) | (13) | (8)
Decreases attributable to |  |  |
Balance as of end-of-period | (219) | (266) | (327)
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 | $ 56 | 74 | (20)
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 |
Decreases attributable to |  |  |
Balance as of end-of-period |  |  | 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) |
Decreases attributable to |  |  |
Balance as of end-of-period |  |  | $ (45)

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