Schedule II - Condensed Financial Information of Parent - Financing Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total	$ 399	$ 1
Revolving lines of credit, capacity	512
Outstanding borrowings	12
Payments of financing costs	1	1	$ 2
Long-term debt	2,502	2,098
Current portion of long-term debt	399	1
Notes Payable | 8.42% Equitable of Iowa Companies Capital Trust II Notes, due 2027
Debt Instrument [Line Items]
Long-term debt	$ 13	$ 13
Annual interest rate on loan	8.42%	8.42%
Debentures | Voya Holdings Debentures
Debt Instrument [Line Items]
Long-term debt	$ 218	$ 218
Parent
Debt Instrument [Line Items]
Intercompany financing - Subsidiaries	176	445
Total	575	445
Revolving lines of credit, capacity	512
Outstanding borrowings	12
Payments of financing costs	1	1	$ 2
Long-term debt	1,871	$ 1,865
Parent | Unsecured and Committed
Debt Instrument [Line Items]
Revolving lines of credit, capacity	512
Parent | Notes Payable | Voya Holdings Inc. | 8.42% Equitable of Iowa Companies Capital Trust II Notes, due 2027 | Financial Guarantee
Debt Instrument [Line Items]
Long-term debt	$ 13