Income Taxes - Tax Sharing Agreement (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Related Party Transaction [Line Items]
Valuation allowance, deferred tax assets	$ 0	$ 0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	0
Voya Financial, Inc.
Related Party Transaction [Line Items]
Income taxes payable	$ (30)	$ (15)