Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Separate Account, Liability [Line Items]
Separate account liabilities	$ 76,257	$ 79,006	$ 83,489
Variable income annuities	222		189
Pension risk transfer annuities	22		20
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 76,013		$ 83,280