Guaranteed Benefit Features (Information On Guaranteed Death Benefit Features) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Return of Net Deposits [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total account value	$ 96,245	$ 117,503
Net amount at risk	$ 990	$ 84
Average attained age of contract holders	67 years	67 years
Minimum Return [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total account value	$ 76	$ 102
Net amount at risk	$ 15	$ 11
Average attained age of contract holders	79 years	79 years
Guaranteed minimum return	5.00%	5.00%
Anniversary Contract Value [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total account value	$ 22,393	$ 28,788
Net amount at risk	$ 3,839	$ 400
Average attained age of contract holders	73 years	73 years