Related Party Transactions - Operating Agreements and Investment Advisory and Other Fees (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Earning related to agreements	$ 1,336	$ 1,136	$ 993
Distribution revenues	1,249	1,136	993
Voya Investment Management LLC
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	78	69	64
Earning related to agreements	102	57	52
Voya Services Company
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	426	430	457
Voya Financial Advisors, Inc
Related Party Transaction [Line Items]
Commission expenses incurred	85	79	72
Affiliated entity \| Voya Financial Partners, LLC (VFP)
Related Party Transaction [Line Items]
Distribution revenues	$ 29	$ 27	$ 24

Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products.

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