Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Assets
Policy loans	$ 995	$ 938
Liabilities
Separate account liabilities	83,439	81,690	$ 76,602
Carrying Value
Assets
Mortgage loans	22,903	22,475
Policy loans	995	938
Other invested assets	257	260
Premiums, reinsurance and other receivables	8,434	7,431
Liabilities
Policyholder account balances	32,678	31,362
Long-term debt	834	836
Other liabilities	2,431	1,191
Separate account liabilities	1,265	1,148
Estimated Fair Value
Assets
Mortgage loans	21,451	20,578
Policy loans	1,032	973
Other invested assets	257	260
Premiums, reinsurance and other receivables	9,119	7,578
Liabilities
Policyholder account balances	32,511	30,501
Long-term debt	825	781
Other liabilities	2,431	1,191
Separate account liabilities	1,265	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	511	479
Other invested assets	242	245
Premiums, reinsurance and other receivables	148	80
Liabilities
Policyholder account balances	0	0
Long-term debt	24	26
Other liabilities	1,704	438
Separate account liabilities	1,265	1,148
Estimated Fair Value | Level 3
Assets
Mortgage loans	21,451	20,578
Policy loans	521	494
Other invested assets	15	15
Premiums, reinsurance and other receivables	8,971	7,498
Liabilities
Policyholder account balances	32,511	30,501
Long-term debt	801	755
Other liabilities	727	753
Separate account liabilities	$ 0	$ 0