Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 83,439	$ 81,690	$ 76,602
Variable income annuities	216		134
Pension risk transfer annuities	23		19
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 83,200		$ 76,449