Shares And Stockholders' Equity (Components And Changes In Accumulated OCI) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Unrealized Gain (Loss) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-year	$ 6,777	$ 9,611
Income tax benefit (expense)	3,030	429
Less:
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(4)	(2)
Associated amortization of DAC, VOBA, DSI, and DFEL	(6)	(9)
Income tax benefit (expense)	2	2
Balance as of end-of-period	(4,387)	8,026
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	(19,862)	(3,329)
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	(370)	(39)
Unrealized Gain (Loss) on AFS Securities [Member] | Change in Deferred Insurance Charges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications and taxes	6,030	1,345
Unrealized Gain (Loss) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-year	(103)	(402)
Change in DAC, VOBA, DSI and DFEL	13	(11)
Income tax benefit (expense)	(107)	(36)
Less:
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	25	8
Associated amortization of DAC, VOBA, DSI, and DFEL	(1)	(1)
Income tax benefit (expense)	(5)	(1)
Balance as of end-of-period	283	(270)
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	126	140
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	373	45
Unrealized Gain (Loss) on Derivative Instruments [Member] | Change in Deferred Insurance Charges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications and taxes	13	(11)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-year	(14)	(12)
Other comprehensive income (loss) before reclassifications and taxes	(18)	2
Income tax benefit (expense)	(1)
Less:
Balance as of end-of-period	(33)	(10)
Funded Status of Employee Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-year	(219)	(266)
Other comprehensive income (loss) before reclassifications and taxes	13	(1)
Less:
Balance as of end-of-period	$ (206)	$ (267)