Consolidated Investment Entities - Consolidated VIEs and VOEs and Nonconsolidated VIEs (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) fund CLO entity	Jun. 30, 2019 entity	Jun. 30, 2020 USD ($) fund CLO entity	Jun. 30, 2019 entity	Dec. 31, 2019 USD ($) fund CLO
Variable Interest Entity [Line Items]
Total assets	$ 166,934		$ 166,934		$ 169,051
Consolidated collateral loan obligations | CLO	2		2		3
Consolidated funds | fund	12		12		12
Number of deconsolidated investment entities | entity	1	0	1	0
Consolidated Investment Entities
Variable Interest Entity [Line Items]
Total assets	$ 1,782		$ 1,782		$ 2,226
VIEs
Variable Interest Entity [Line Items]
Total assets	1,782		1,782		2,063
VOEs
Variable Interest Entity [Line Items]
Total assets	0		$ 0		$ 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	396		$ 396		$ 377
Voya Financial, Inc.
Variable Interest Entity [Line Items]
Total assets	12,730		12,730		12,273
Voya Financial, Inc. | Consolidated Investment Entities
Variable Interest Entity [Line Items]
Total assets	$ 167		$ 167		$ 279
Senior secured corporate loans | VIEs
Variable Interest Entity [Line Items]
Default of collateral assets, percentage	2.00%		2.00%		1.00%