Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Separate Account, Liability [Line Items]
Separate account liabilities	$ 81,690	$ 78,880
Variable income annuities	161	130
Pension risk transfer annuities	19	16
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 81,510	$ 78,734