Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Assets
Policy loans	$ 1,076	$ 938
Liabilities
Separate account liabilities	81,575	81,690	$ 81,901
Carrying Value
Assets
Mortgage loans	22,606	22,475
Policy loans	1,076	938
Other invested assets	243	260
Premiums, reinsurance and other receivables	8,076	7,431
Liabilities
Policyholder account balances	32,364	31,362
Long-term debt	835	836
Other liabilities	1,372	1,191
Separate account liabilities	1,253	1,148
Estimated Fair Value
Assets
Mortgage loans	20,560	20,578
Policy loans	1,098	973
Other invested assets	243	260
Premiums, reinsurance and other receivables	8,369	7,578
Liabilities
Policyholder account balances	31,950	30,501
Long-term debt	791	781
Other liabilities	1,372	1,191
Separate account liabilities	1,253	1,148
Estimated Fair Value | Level 1
Assets
Mortgage loans	0	0
Policy loans	0	0
Other invested assets	0	0
Premiums, reinsurance and other receivables	0	0
Liabilities
Policyholder account balances	0	0
Long-term debt	0	0
Other liabilities	0	0
Separate account liabilities	0	0
Estimated Fair Value | Level 2
Assets
Mortgage loans	0	0
Policy loans	603	479
Other invested assets	237	245
Premiums, reinsurance and other receivables	117	80
Liabilities
Policyholder account balances	0	0
Long-term debt	24	26
Other liabilities	635	438
Separate account liabilities	1,253	1,148
Estimated Fair Value | Level 3
Assets
Mortgage loans	20,560	20,578
Policy loans	495	494
Other invested assets	6	15
Premiums, reinsurance and other receivables	8,252	7,498
Liabilities
Policyholder account balances	31,950	30,501
Long-term debt	767	755
Other liabilities	737	753
Separate account liabilities	$ 0	$ 0