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	$ 1,321	$ 1,398	$ 1,466
Reinsurance assumed	8	(10)	12
Reinsurance ceded	(688)	(701)	(742)
Net premiums	641	687	736
Universal life and investment-type product policy fees [Abstract]
Direct universal life and investment-type product policy fees	3,209	3,533	3,376
Reinsurance assumed	52	50	55
Reinsurance ceded	(699)	(597)	(592)
Net universal life and investment-type product policy fees	2,562	2,986	2,839
Other revenues
Other Income Direct	220	262	239
Commissions Fees And Other Income Assumed	3	6	18
Other Income Ceded	180	66	45
Other adjustments to net income (loss)	403	334	302
Policyholder benefits and claims:
Direct policyholder benefits and claims	6,025	4,677	7,445
Reinsurance assumed	152	125	158
Reinsurance ceded	(2,034)	(1,589)	(1,914)
Net policyholder benefits and claims	4,143	3,213	5,689
Other Expenses [Abstract]
Direct other expenses	1,756	1,815	1,851
Assumed Other Expenses	(17)	(5)	2
Ceded Other Expenses	(64)	(10)	(9)
Total other expenses	$ 1,675	$ 1,800	$ 1,844