Policyholder Account Balances - Schedule of Policyholder Account Balances (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 123,715	$ 120,316
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	32,853	29,141	$ 26,257	$ 22,184
Fixed Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	25,814	25,330	23,786	23,338
UL and Other
Policyholder Account Balance [Line Items]
Policyholder account balances	36,474	36,784	37,042	37,258
Retirement Plan Services
Policyholder Account Balance [Line Items]
Policyholder account balances	23,598	23,784	$ 24,430	$ 25,138
Other
Policyholder Account Balance [Line Items]
Policyholder account balances	4,976	5,277
Other | Reinsurance Agreement
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 4,600	$ 4,900