Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Policy loans	$ 1,626	$ 938
Liabilities
Separate account liabilities	79,006	81,690
Carrying Value
Assets
Mortgage loans	23,254	22,475
Policy loans	1,626	938
Other invested assets	237	260
Premiums, reinsurance and other receivables	8,394	7,431
Liabilities
Policyholder account balances	31,830	31,362
Long-term debt	833	836
Other liabilities	1,360	1,191
Separate account liabilities	1,244	1,148
Estimated Fair Value
Assets
Mortgage loans	21,343	20,578
Policy loans	1,646	973
Other invested assets	237	260
Premiums, reinsurance and other receivables	9,145	7,578
Liabilities
Policyholder account balances	31,467	30,501
Long-term debt	785	781
Other liabilities	1,360	1,191
Separate account liabilities	1,244	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	1,123	479
Other invested assets	222	245
Premiums, reinsurance and other receivables	43	80
Liabilities
Policyholder account balances	0	0
Long-term debt	23	26
Other liabilities	648	438
Separate account liabilities	1,244	1,148
Estimated Fair Value | Level 3
Assets
Mortgage loans	21,343	20,578
Policy loans	523	494
Other invested assets	15	15
Premiums, reinsurance and other receivables	9,102	7,498
Liabilities
Policyholder account balances	31,467	30,501
Long-term debt	762	755
Other liabilities	712	753
Separate account liabilities	$ 0	$ 0