Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Separate Account, Liability [Line Items]
Separate account liabilities	$ 80,311	$ 79,006	$ 83,439
Variable income annuities	237		216
Pension risk transfer annuities	26		23
Rollforwards Total
Separate Account, Liability [Line Items]
Separate account liabilities	$ 80,048		$ 83,200

Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account.

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