Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 87,162	$ 80,193
Separate account liabilities	79,006	81,690
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	2,028	1,980	$ 2,100	$ 2,134
Separate account liabilities	2,484	2,276	1,970
Total account balances	4,512	4,256	4,070
Net amount at risk	20,958	22,214	23,818
Cash surrender value	4,303	4,049	3,789
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	3,667	4,111	4,664	4,475
Separate account liabilities	74,483	77,086	74,845	101,108
Total account balances	78,150	81,197	79,509
Net amount at risk	12,757	13,156	16,334
Cash surrender value	77,761	80,756	79,222
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	48,605	41,627	33,897	32,000
Separate account liabilities	0	0	0
Total account balances	48,605	41,627	33,897
Cash surrender value	47,013	39,270	31,293
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,665	14,672	14,274	11,849
Separate account liabilities	0	0	0
Total account balances	14,665	14,672	14,274
Cash surrender value	14,361	14,068	13,723
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,779	5,052	5,307	5,569
Separate account liabilities	0	0	0
Total account balances	4,779	5,052	5,307
Net amount at risk	63,580	65,299	66,926
Cash surrender value	4,316	4,498	4,671
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	1,166	653	641	646
Separate account liabilities	1,799	2,148	1,919	$ 2,367
Total account balances	2,965	2,801	2,560
Net amount at risk	2,649	2,644	3,368
Cash surrender value	$ 2,134	$ 2,579	$ 2,344