Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 81,575	$ 81,690	$ 81,901
Variable income annuities	198		134
Pension risk transfer annuities	22		19
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 81,355		$ 81,748