Policyholder Account Balances - Schedule of Policyholder Account Balances (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 120,737	$ 114,435
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	29,141	22,184	$ 19,148
Fixed Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	25,355	23,365	22,552
UL and Other
Policyholder Account Balance [Line Items]
Policyholder account balances	37,180	37,694	38,200
Retirement Plan Services
Policyholder Account Balance [Line Items]
Policyholder account balances	23,784	25,138	$ 23,579
Other
Policyholder Account Balance [Line Items]
Policyholder account balances	5,277	6,054
Other | Reinsurance Agreement
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 4,900	$ 5,700