Policyholder Account Balances - Schedule of Policyholder Account Balances (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 128,849	$ 125,818
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	37,026	35,267	$ 32,853	$ 29,141
Fixed Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	26,812	25,941	25,814	25,330
UL and Other
Policyholder Account Balance [Line Items]
Policyholder account balances	35,776	36,242	36,474	36,784
Retirement Plan Services
Policyholder Account Balance [Line Items]
Policyholder account balances	23,700	23,619	$ 23,598	$ 23,784
Other
Policyholder Account Balance [Line Items]
Policyholder account balances	5,535	4,749
Other | Reinsurance Agreement
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 4,200	$ 4,400