Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 79,006	$ 81,690
Variable income annuities	217	161
Pension risk transfer annuities	23	19
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 78,766	$ 81,510