Reinsurance (Effects of Reinsurance on Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Premiums:
Direct Premiums	$ 45,153	$ 43,359	$ 47,618
Reinsurance assumed	3,788	3,112	3,035
Reinsurance ceded	(3,996)	(2,188)	(2,143)
Net premiums	44,945	44,283	48,510
Universal life and investment-type product policy fees:
Direct universal life and investment-type product policy fees	5,914	5,787	5,687
Reinsurance assumed	(3)	(19)	32
Reinsurance ceded	(937)	(616)	(494)
Net universal life and investment product policy fees	4,974	5,152	5,225
Ceded Policyholder Benefits and Claims Incurred Net And Policyholder Dividends	(4,548)	(2,469)	(2,405)
Ceded Policyholder Liability, Change in Fair Value, Gain (Loss)	(24)	29	11
Ceded market risk benefits remeasurement (gains) losses	6	5	8
Policyholder Benefits and Claims:
Direct policyholder benefits and claims	45,662	44,155	49,308
Reinsurance assumed	3,614	2,904	2,604
Policyholder benefits and claims	44,728	44,590	49,507
Policyholder Liability Remeasurement (Gains) Losses:
Direct Policyholder Liability Remeasurement (Gains) Losses	(169)	(54)	94
Assumed Policyholder Liability, Change in Fair Value, Gain (Loss)	(13)	(20)	9
Policyholder liability remeasurement (gains) losses	206	45	(114)
Market Risk Benefit:
Direct market risk benefits remeasurement (gains) losses	(992)	(785)	(3,636)
Assumed Market Risk Benefits Remeasurement (Gains) Losses	(123)	(214)	(46)
Net market risk benefits remeasurement (gains) losses	1,109	994	3,674
Other expenses:
Direct other expenses	13,054	12,760	11,854
Reinsurance assumed	202	235	268
Reinsurance ceded	239	285	263
Total other expenses	$ 13,017	$ 12,710	$ 11,859