Insurance (Separate Accounts Liability) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	$ 78,880
Separate Account, Liability, Ending Balance	81,901	$ 82,622
Variable Annuities
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	74,845	101,108
Premiums and deposits	406	792
Surrenders and withdrawals	(2,877)	(3,057)
Benefit payments	(719)	(692)
Investment performance	6,906	(18,347)
Policy charges	(1,044)	(1,135)
Net transfers from (to) separate account	(9)	(136)
Other	(9)	34
Separate Account, Liability, Ending Balance	77,499	78,567
Universal Life Insurance
Separate Account, Liability [Line Items]
Separate Account, Liability, Beginning Balance	1,970	2,577
Premiums and deposits	42	45
Surrenders and withdrawals	(38)	(30)
Benefit payments	(11)	(9)
Investment performance	253	(548)
Policy charges	(40)	(42)
Net transfers from (to) separate account	(7)	(12)
Other	0	3
Separate Account, Liability, Ending Balance	2,169	1,984
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	(7)	(11)
Benefit payments	(16)	(17)
Investment performance	212	(384)
Policy charges	(24)	(34)
Net transfers from (to) separate account	0	(2)
Other	(4)	6
Separate Account, Liability, Ending Balance	$ 2,080	$ 1,925