Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income (loss) available to common shareholders:
Income (loss) from continuing operations	$ (53)	$ 210	$ (3)	$ 303
Less: Preferred stock dividends	4	0	18	10
Less: Net income (loss) attributable to noncontrolling interest	(79)	26	(73)	25
Income (loss) from continuing operations available to common shareholders	22	184	52	268
Income (loss) from discontinued operations, net of tax	(93)	42	(221)	22
Net Income (Loss) Available to Common Stockholders, Basic	$ (71)	$ 226	$ (169)	$ 290
Weighted average common shares outstanding
Basic (in shares)	126.2	144.1	128.6	145.5
Dilutive Effects:
Diluted (in shares)	128.3	149.9	132.9	150.6
Basic [Abstract]
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders (usd per share)	$ 0.17	$ 1.27	$ 0.40	$ 1.84
Income (loss) from discontinued operations, net of taxes available to Voya Financial, Inc.'s common shareholders (usd per share)	(0.73)	0.29	(1.72)	0.15
Income (loss) available to Voya Financial, Inc.'s common shareholders (usd per share)	(0.56)	1.57	(1.32)	1.99
Diluted [Abstract]
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders (usd per share)	0.17	1.22	0.39	1.78
Income (loss) from discontinued operations, net of taxes available to Voya Financial, Inc.'s common shareholders (usd per share)	(0.72)	0.28	(1.66)	0.15
Income (loss) available to Voya Financial, Inc.'s common shareholders (usd per share)	$ (0.55)	$ 1.51	$ (1.27)	$ 1.93
Warrant
Dilutive Effects:
Dilutive Effects (in shares)	0.0	2.3	1.5	1.2
RSU awards
Dilutive Effects:
Dilutive Effects (in shares)	0.8	1.2	1.0	1.3
PSU awards
Dilutive Effects:
Dilutive Effects (in shares)	1.0	1.6	1.4	2.0
Stock options
Dilutive Effects:
Dilutive Effects (in shares)	0.3	0.7	0.4	0.6