Reinsurance (Effects of Reinsurance on Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Premiums:
Direct Premiums	$ 48,503	$ 41,259	$ 42,201
Reinsurance assumed	3,037	2,907	2,032
Reinsurance ceded	(2,143)	(2,157)	(2,199)
Net premiums	49,397	42,009	42,034
Universal life and investment-type product policy fees:
Direct universal life and investment-type product policy fees	6,004	6,271	6,122
Reinsurance assumed	76	45	50
Reinsurance ceded	(495)	(560)	(569)
Net universal life and investment product policy fees	5,585	5,756	5,603
Policyholder Benefits and Claims:
Direct policyholder benefits and claims	50,436	44,035	42,221
Reinsurance assumed	2,612	2,570	1,745
Reinsurance ceded	(2,436)	(2,651)	(2,505)
Net policyholder benefits and claims	50,612	43,954	41,461
Other expenses:
Direct other expenses	12,013	12,450	13,013
Reinsurance assumed	285	375	371
Reinsurance ceded	264	239	234
Total other expenses	$ 12,034	$ 12,586	$ 13,150