Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 85,015		$ 77,742
Separate account liabilities	81,575	$ 81,690	81,901
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	1,998	1,980	1,994	$ 2,100
Separate account liabilities	2,406		2,169
Total account balances	4,404		4,163
Net amount at risk	21,572		22,941
Cash surrender value	4,202		3,949
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	3,865	4,111	4,421	4,664
Separate account liabilities	76,697	77,086	77,499	74,845
Total account balances	80,562		81,920
Net amount at risk	12,577		13,560
Cash surrender value	80,155		81,633
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	46,089	41,627	38,549	33,897
Separate account liabilities	0		0
Total account balances	46,089		38,549
Cash surrender value	43,846		35,860
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,726	14,672	14,905	14,274
Separate account liabilities	0		0
Total account balances	14,726		14,905
Cash surrender value	14,063		14,281
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,914	5,052	5,188	5,307
Separate account liabilities	0		0
Total account balances	4,914		5,188
Net amount at risk	64,450		69,602
Cash surrender value	4,414		6,160
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	659	653	646	641
Separate account liabilities	2,252	$ 2,148	2,080	$ 1,919
Total account balances	2,911		2,726
Net amount at risk	2,661		2,633
Cash surrender value	$ 2,583		$ 2,512