Shares and Stockholder's Equity (Components And Changes In Accumulated OCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-period	$ 25,041	$ 21,585
Decreases attributable to
Balance as of end-of-period	22,380	25,041	$ 21,585
Unrealized Gain (Loss) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-period	8,993	5,637	536
Decreases attributable to
Income tax benefit (expense)	733	(901)	(1,370)
Reclassification adjustment for gains (losses) included in net income (loss)	(10)	(52)	(26)
Associated amortization of DAC, VOBA, DSI, and DFEL	(23)	38	(11)
Income tax benefit (expense)	(7)	(3)	(8)
Balance as of end-of-period	6,315	8,993	5,637
Unrealized Gain (Loss) on AFS Securities [Member] | Gains (Losses) Arising During The Year [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	(5,109)	7,585	8,856
Unrealized Gain (Loss) on AFS Securities [Member] | Change in Foreign Currency Exchange Rate Adjustment [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	(146)	180	46
Unrealized Gain (Loss) on AFS Securities [Member] | Change in Deferred Insurance Charges [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	1,818	(3,559)	(2,460)
Unrealized OTTI on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-period		40	29
(Increases) attributable to:
Gross OTTI recognized in OCI during the period			(14)
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			30
Change in DAC, VOBA, DSI, and DFEL			(2)
Income tax benefit (expense)			(7)
Balance as of end-of-period			40
Unrealized Gain (Loss) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-period	42	181	119
Decreases attributable to
Income tax benefit (expense)	(65)	26	(26)
Reclassification adjustment for gains (losses) included in net income (loss)	49	64	47
Associated amortization of DAC, VOBA, DSI, and DFEL	(2)	(7)	(2)
Income tax benefit (expense)	(10)	(12)	(9)
Balance as of end-of-period	240	42	181
Unrealized Gain (Loss) on Derivative Instruments [Member] | Gains (Losses) Arising During The Year [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	141	77	181
Unrealized Gain (Loss) on Derivative Instruments [Member] | Change in Foreign Currency Exchange Rate Adjustment [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	152	(174)	(52)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Change in Deferred Insurance Charges [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	7	(23)	(5)
Funded Status of Employee Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of beginning-of-period	(14)	(22)	(25)
Decreases attributable to
Income tax benefit (expense)	(1)	(2)	(1)
Balance as of end-of-period	(11)	(14)	(22)
Funded Status of Employee Benefit Plans [Member] | Gains (Losses) Arising During The Year [Member]
Decreases attributable to
Other comprehensive income (loss) before reclassifications and taxes	$ 4	10	4
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-period		40
Decreases attributable to
Balance as of end-of-period			40
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-period		$ (40)
Decreases attributable to
Balance as of end-of-period			$ (40)