Consolidated Investment Entities - Consolidated VIEs and VOEs and Nonconsolidated VIEs (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) entity fund CLO	Mar. 31, 2019 entity	Dec. 31, 2019 USD ($) fund CLO
Variable Interest Entity [Line Items]
Total assets	$ 155,732		$ 169,051
Consolidated collateral loan obligations | CLO	3		3
Consolidated funds | fund	12		12
Number of deconsolidated investment entities | entity	0	0
Consolidated Investment Entities
Variable Interest Entity [Line Items]
Total assets	$ 2,155		$ 2,226
VIEs
Variable Interest Entity [Line Items]
Total assets	1,970		2,063
VOEs
Variable Interest Entity [Line Items]
Total assets	$ 185		$ 163
Number of sponsored investment funds accounted for as VOE | fund	1		1
VIEs, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Amount of ownership interest in unconsolidated CLOs	$ 339		$ 377
Voya Financial, Inc.
Variable Interest Entity [Line Items]
Total assets	10,872		12,273
Voya Financial, Inc. | Consolidated Investment Entities
Variable Interest Entity [Line Items]
Total assets	$ 292		$ 279
Senior secured corporate loans | VIEs
Variable Interest Entity [Line Items]
Default of collateral assets, percentage	1.00%		1.00%