Reinsurance (Reinsurance amounts recorded on the Consolidated Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance [Abstract]
Direct insurance premiums and fee income	$ 13,807	$ 14,010	$ 13,159
Reinsurance assumed	102	97	101
Reinsurance ceded	(2,285)	(2,136)	(2,018)
Total insurance premiums and fee income	11,624	11,971	11,242
Direct insurance benefits	14,982	10,578	10,497
Reinsurance recoveries netted against benefits	(4,181)	(2,539)	(2,447)
Total benefits	$ 10,801	$ 8,039	$ 8,050