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	$ 129,209	$ 126,197
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	26,832	25,963	25,837	25,355
UL and Other
Policyholder Account Balance [Line Items]
Policyholder account balances	36,116	36,599	36,848	37,180
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