Policyholder Account Balances - Schedule of Policyholder Account Balances (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 139,184	$ 135,904
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	42,568	40,060	$ 37,026	$ 35,267
Fixed Annuities
Policyholder Account Balance [Line Items]
Policyholder account balances	29,400	28,710	26,812	25,941
UL and Other
Policyholder Account Balance [Line Items]
Policyholder account balances	35,382	35,663	35,776	36,242
Retirement Plan Services
Policyholder Account Balance [Line Items]
Policyholder account balances	23,419	23,843	$ 23,700	$ 23,619
Other
Policyholder Account Balance [Line Items]
Policyholder account balances	8,415	7,628
Other | FABN | Sustainable Financing
Policyholder Account Balance [Line Items]
Policyholder account balances	4,800	3,700
Other | Reinsurance Agreement
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 3,300	$ 3,500