Insurance (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 77,742		$ 65,763
Separate account liabilities	81,901	$ 78,880	82,622
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	1,994	2,100	2,109	$ 2,134
Separate account liabilities	2,169		1,984
Total account balances	4,163		4,093
Net amount at risk	22,941		24,675
Cash surrender value	3,949		3,819
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,421	4,664	4,499	4,475
Separate account liabilities	77,499	74,845	78,567	101,108
Total account balances	81,920		83,066
Net amount at risk	13,560		15,360
Cash surrender value	81,633		83,080
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	38,549	33,897	30,926	32,000
Separate account liabilities	0		0
Total account balances	38,549		30,926
Cash surrender value	35,860		27,083
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,905	14,274	11,897	11,849
Separate account liabilities	0		0
Total account balances	14,905		11,897
Cash surrender value	14,281		11,158
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	5,188	5,307	5,454	5,569
Separate account liabilities	0		0
Total account balances	5,188		5,454
Net amount at risk	69,602		71,683
Cash surrender value	6,160		6,363
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	646	641	652	646
Separate account liabilities	2,080	$ 1,919	1,925	$ 2,367
Total account balances	2,726		2,577
Net amount at risk	2,633		3,290
Cash surrender value	$ 2,512		$ 2,348