Schedule II - Condensed Financial Information of Parent - Loans to Subsidiaries (Details) - Parent - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to subsidiaries	$ 392,000,000	$ 293,000,000
Interest income, operating	$ 24,000,000	18,000,000	$ 5,000,000
Voya Institutional Plan Services, LLC | Subsidiary Loan, Due January 3, 2023, 3.83 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	4.50%
Loans to subsidiaries	$ 43,000,000	0
Voya Institutional Plan Services, LLC | Subsidiary Loan, Due January 2, 2024, 5.44 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	5.44%
Loans to subsidiaries	$ 0	$ 31,000,000
Voya Investment Management, LLC | Subsidiary Loan, Due January 13, 2023, 4.46 Percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate		4.57%
Loans to subsidiaries	50,000,000	$ 0
Voya Services Company | Subsidiary Loan, Due January 3, 2023, 3.83 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate		4.50%
Loans to subsidiaries	$ 224,000,000	$ 0
Voya Services Company | Subsidiary Loan, Due January 2, 2024, 5.44 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	5.44%
Loans to subsidiaries	$ 0	185,000,000
Voya Payroll Management, Inc. | Subsidiary Loan, Due January 2, 2024, 5.44 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	5.44%
Loans to subsidiaries	$ 0	11,000,000
Voya Payroll Management, Inc. | Subsidiary Loan, Due January 2, 2025, 4.50 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	4.50%
Loans to subsidiaries	$ 2,000,000
Voya Holdings Inc. | Subsidiary Loan, Due January 18, 2024, 5.53 Percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	5.53%
Loans to subsidiaries	$ 0	44,000,000
Voya Holdings Inc. | Subsidiary Loan, Due January 12, 2024, 5.51 Percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	5.51%
Loans to subsidiaries	$ 0	$ 22,000,000
Voya Holdings Inc. | Subsidiary Loan, Due January 30, 2025, 4.57 Percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	4.57%
Loans to subsidiaries	$ 5,000,000
ReliaStar Life Insurance Company [Member] | Subsidiary Loan, Due January 2, 2025, 4.50 percent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate	4.50%
Loans to subsidiaries	$ 68,000,000