Reinsurance (Reinsurance Amounts Recorded on Consolidated Statements of Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance [Abstract]
Direct insurance premiums and fee income	$ 14,154	$ 13,304	$ 13,498
Reinsurance assumed	94	95	91
Reinsurance ceded	(1,744)	(1,656)	(1,579)
Total insurance premiums and fee income	12,504	11,743	12,010
Direct insurance benefits	10,714	10,630	9,574
Reinsurance recoveries netted against benefits	(2,185)	(1,953)	(1,694)
Benefits	$ 8,529	$ 8,677	$ 7,880