Insurance (Separate Accounts Liability) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	$ 78,880
Separate Account, Liability, Ending Balance	81,124	$ 96,995
Variable Annuities
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	74,845	101,108
Premiums and deposits	215	430
Surrenders and withdrawals	(1,437)	(1,646)
Benefit payments	(373)	(362)
Investment performance	4,141	(6,629)
Policy charges	(503)	(561)
Net transfers from (to) separate account	(9)	(76)
Other	2	12
Separate Account, Liability, Ending Balance	76,881	92,276
Universal Life Insurance
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	1,970	2,577
Premiums and deposits	22	23
Surrenders and withdrawals	(16)	(16)
Benefit payments	(3)	(5)
Investment performance	137	(197)
Policy charges	(21)	(17)
Net transfers from (to) separate account	(3)	(7)
Other	0	(1)
Separate Account, Liability, Ending Balance	2,086	2,357
Company Owned Life Insurance
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	1,919	2,367
Premiums and deposits	0	0
Surrenders and withdrawals	(3)	(7)
Benefit payments	(10)	(10)
Investment performance	111	(138)
Policy charges	(12)	(11)
Net transfers from (to) separate account	0	(2)
Other	0	0
Separate Account, Liability, Ending Balance	$ 2,005	$ 2,199