Insurance (Policyholder Account Balances) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Policyholder Account Balance [Line Items]
Interest credited	$ 416	$ 242
Policyholder Account Balance, Ending Balance	75,209	65,752
Universal Life Insurance
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	2,100	2,134
Premiums and deposits	49	51
Surrenders and withdrawals	(61)	(13)
Benefit payments	(23)	(19)
Net transfers from (to) separate account	3	7
Interest credited	16	0
Policy charges	(51)	(51)
Changes related to embedded derivatives	0	0
Policyholder Account Balance, Ending Balance	$ 2,033	$ 2,109
Weighted-average crediting rate (2)	0.77%	0.00%
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	$ 4,664	$ 4,475
Premiums and deposits	27	48
Surrenders and withdrawals	(163)	(118)
Benefit payments	(31)	(31)
Net transfers from (to) separate account	9	76
Interest credited	39	42
Policy charges	(6)	(6)
Changes related to embedded derivatives	0	0
Policyholder Account Balance, Ending Balance	$ 4,539	$ 4,486
Weighted-average crediting rate (2)	0.85%	0.94%
Index-linked Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	$ 33,896	$ 32,000
Premiums and deposits	1,677	1,594
Surrenders and withdrawals	(785)	(473)
Benefit payments	(50)	(36)
Net transfers from (to) separate account	0	0
Interest credited	96	71
Policy charges	(2)	(2)
Changes related to embedded derivatives	1,090	(756)
Policyholder Account Balance, Ending Balance	$ 35,922	$ 32,398
Weighted-average crediting rate (2)	0.32%	0.27%
Fixed Rate Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	$ 14,274	$ 11,849
Premiums and deposits	912	44
Surrenders and withdrawals	(506)	(155)
Benefit payments	(102)	(83)
Net transfers from (to) separate account	0	0
Interest credited	106	72
Policy charges	0	0
Changes related to embedded derivatives	0	0
Policyholder Account Balance, Ending Balance	$ 14,684	$ 11,727
Weighted-average crediting rate (2)	0.73%	0.61%
ULSG
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	$ 5,307	$ 5,569
Premiums and deposits	171	176
Surrenders and withdrawals	(6)	(10)
Benefit payments	(38)	(22)
Net transfers from (to) separate account	0	0
Interest credited	43	62
Policy charges	(258)	(263)
Changes related to embedded derivatives	0	0
Policyholder Account Balance, Ending Balance	$ 5,219	$ 5,512
Weighted-average crediting rate (2)	0.82%	1.12%
Company Owned Life Insurance
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance	$ 641	$ 646
Premiums and deposits	0	0
Surrenders and withdrawals	0	1
Benefit payments	(2)	(3)
Net transfers from (to) separate account	0	2
Interest credited	7	6
Policy charges	(2)	(2)
Changes related to embedded derivatives	0	0
Policyholder Account Balance, Ending Balance	$ 644	$ 650
Weighted-average crediting rate (2)	1.09%	0.93%