Policyholder Account Balances - Amounts on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 239,836	$ 236,857
Other Products
Policyholder Account Balance [Line Items]
Policyholder account balance	22,205	22,800
Group Life \| Group Benefits
Policyholder Account Balance [Line Items]
Policyholder account balance	11,085	11,005	$ 11,340
Capital Markets Investment Products and Stable Value GICs \| RIS
Policyholder Account Balance [Line Items]
Policyholder account balance	67,069	65,592	65,147	$ 63,715
Annuities and Risk Solutions \| RIS
Policyholder Account Balance [Line Items]
Policyholder account balance	27,489	26,406	24,620
Universal and Variable Universal Life \| Asia
Policyholder Account Balance [Line Items]
Policyholder account balance	54,812	54,374	51,963	50,801
Fixed Annuity \| Asia
Policyholder Account Balance [Line Items]
Policyholder account balance	43,956	43,188	39,301	$ 38,421
Fixed Annuity \| Corporate And Other
Policyholder Account Balance [Line Items]
Policyholder account balance	6,184	6,383	6,807
Life and Other \| Corporate And Other
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 7,036	$ 7,109	$ 7,292