Investments (excluding Consolidated Investment Entities) - Net Gains (Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	$ (27)	$ (72)	$ (686)
Voya India
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	45	45
Embedded derivatives - fixed maturities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(6)	(1)	(9)
Other derivatives, net
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	2	0	0
Standalone derivatives
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(1)	0	(12)
Managed Custody Guarantees
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	4	(2)	(5)
Stabilizer
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(14)	(1)	19
Derivatives
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	193	29	305
Mortgage loans on real estate
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(1)	(12)	0
Other investments, including securities pledged
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	5	43	5
Fixed maturities, available-for-sale, including securities pledged
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(48)	(31)	(30)
Fixed maturities, at fair value using the fair value option
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	(167)	(100)	(920)
Equity securities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net gains (losses)	$ 6	$ 3	$ (39)