Financing Agreements - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 17, 2015	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 03, 2023	May 01, 2023	Jan. 23, 2018	May 16, 2013
Debt Instrument [Line Items]
Long-term debt		$ 2,502	$ 2,098
Business agreement, term of agreement	10 years
Put option agreement, face amount	$ 500	100
Capacity		512
Utilization		12
Revolving Credit Agreement
Debt Instrument [Line Items]
Utilization		0
Aetna Notes
Debt Instrument [Line Items]
Amounts of LOCs outstanding		12
Revolving Credit Agreement
Debt Instrument [Line Items]
Capacity		$ 500
Minimum net worth required for compliance						$ 4,998
Voya Holdings Debentures | Aetna Notes
Debt Instrument [Line Items]
Minimum principal outstanding in year one			0
Quarterly fee to guarantor of notes if minimum principal balance is not met		1.25%
Collateral amount		$ 227
Cash collateral deposited for debt		215
Voya Holdings Debentures | Aetna Notes | Minimum
Debt Instrument [Line Items]
Collateral amount		218	218
U.S. Treasuries
Debt Instrument [Line Items]
Amount of unsecured notes issued					$ 400
Five Point Six Five Percentage Fixed-to-Floating Rate Junior Subordinated Note Due 2053
Debt Instrument [Line Items]
Annual interest rate on loan								5.65%
Short-Term Debt | Revolving Credit Agreement
Debt Instrument [Line Items]
Capacity						$ 25
Senior Notes
Debt Instrument [Line Items]
Annual interest rate on loan	1.875%
Senior Notes | 5.0% Senior Notes, due 2034
Debt Instrument [Line Items]
Amount of unsecured notes issued		$ 400
Annual interest rate on loan		5.00%
Proceeds from debt		$ 397
Long-term debt		395	0
Senior Notes | 3.976% Senior Notes, due 2025
Debt Instrument [Line Items]
Amount of unsecured notes issued		$ 400
Annual interest rate on loan		3.976%
Long-term debt		$ 399	$ 390
Senior Notes | Pre-Capitalized Trust
Debt Instrument [Line Items]
Amount of unsecured notes issued					$ 400
Annual interest rate on loan	3.976%
Junior Subordinated Notes
Debt Instrument [Line Items]
Maximum deferral period for one or more consecutive interest payments		5 years
Junior Subordinated Notes | 5.65% Fixed-to-Floating Rate Junior Subordinated Notes, due 2053
Debt Instrument [Line Items]
Amount of unsecured notes issued		$ 357
Annual interest rate on loan								5.65%
Junior Subordinated Notes | 4.7% Fixed-to-Floating Rate Junior Subordinated Notes, due 2048
Debt Instrument [Line Items]
Amount of unsecured notes issued		$ 10					$ 340
Annual interest rate on loan		4.70%	4.70%				4.70%
Long-term debt		$ 336	$ 336
Debentures | 7.63% Voya Holdings Inc. debentures, due 2026
Debt Instrument [Line Items]
Annual interest rate on loan		7.625%	7.625%
Long-term debt		$ 139	$ 139
Debentures | 6.97% Voya Holdings Inc. debentures, due 2036
Debt Instrument [Line Items]
Annual interest rate on loan		6.97%	6.97%
Long-term debt		$ 79	$ 79
Debentures | Voya Holdings Debentures
Debt Instrument [Line Items]
Long-term debt		218	218
Revolving Credit Agreement
Debt Instrument [Line Items]
Amounts of LOCs outstanding		0
Utilization		$ 0
Interest expense | Debt securities
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 5	$ 3