Insurance Liabilities (Reconciliation of Policyholder Account Balances) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 87,174	$ 87,162
Rollforwards Total
Policyholder Account Balance [Line Items]
Policyholder Account Balance	76,294	74,910
Funding agreements classified as investment contracts
Policyholder Account Balance [Line Items]
Policyholder Account Balance	9,502	11,002
Institutional group annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance	569	370
Other investment contract liabilities
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 809	$ 880