Separate Accounts (Separate Account Liability) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	$ 78,880
Separate Account, Liability, Ending Balance	81,690	$ 78,880
Variable Annuities
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	74,845	101,108	$ 99,257
Premiums and deposits	762	1,199	2,081
Surrenders and withdrawals	(6,073)	(5,965)	(7,971)
Benefit payments	(1,391)	(1,298)	(1,575)
Investment performance	11,071	(17,878)	12,054
Policy charges	(2,098)	(2,227)	(2,481)
Net transfers from (to) general account	(14)	(131)	(238)
Other	(16)	37	(19)
Separate Account, Liability, Ending Balance	77,086	74,845	101,108
Universal Life Insurance
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	1,970	2,576	2,339
Premiums and deposits	84	91	97
Surrenders and withdrawals	(68)	(55)	(69)
Benefit payments	(18)	(24)	(24)
Investment performance	405	(519)	336
Policy charges	(78)	(78)	(85)
Net transfers from (to) general account	(18)	(21)	(17)
Other	(1)	0	(1)
Separate Account, Liability, Ending Balance	2,276	1,970	2,576
Company-Owned Life Insurance
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	1,919	2,367	2,253
Premiums and deposits	0	0	3
Surrenders and withdrawals	(20)	(16)	(68)
Benefit payments	(28)	(33)	(38)
Investment performance	327	(356)	234
Policy charges	(58)	(61)	(47)
Net transfers from (to) general account	(1)	13	35
Other	9	5	(5)
Separate Account, Liability, Ending Balance	$ 2,148	$ 1,919	$ 2,367