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	$ 88,260	$ 88,271	$ 88,392
Variable income annuities	218		152
Pension risk transfer annuities	22		19
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 88,020		$ 88,221