Insurance (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 75,209		$ 65,752
Separate account liabilities	81,124	$ 78,880	96,995
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	2,033	2,100	2,109	$ 2,134
Separate account liabilities	2,086		2,357
Total account balances	4,119		4,466
Net amount at risk	23,332		24,777
Cash surrender value	3,862		4,183
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,539	4,664	4,486	4,475
Separate account liabilities	76,881	74,845	92,276	101,108
Total account balances	81,420		96,762
Net amount at risk	14,757		9,189
Cash surrender value	81,110		96,744
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	35,922	33,896	32,398	32,000
Separate account liabilities	0		0
Total account balances	35,922		32,398
Cash surrender value	33,567		29,442
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,684	14,274	11,727	11,849
Separate account liabilities	0		0
Total account balances	14,684		11,727
Cash surrender value	14,106		10,993
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	5,219	5,307	5,512	5,569
Separate account liabilities	0		0
Total account balances	5,219		5,512
Net amount at risk	70,062		72,059
Cash surrender value	6,203		6,400
Company Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	644	641	650	646
Separate account liabilities	2,005	$ 1,919	2,199	$ 2,367
Total account balances	2,649		2,849
Net amount at risk	3,407		3,494
Cash surrender value	$ 2,430		$ 2,619