Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income (loss) available to common shareholders:
Income (loss) from continuing operations	$ (73)	$ 144	$ (76)	$ 447
Less: Preferred stock dividends	14	14	32	24
Less: Net income (loss) attributable to noncontrolling interest	106	19	33	44
Income (loss) from continuing operations available to common shareholders	(193)	111	(141)	380
Income (loss) from discontinued operations, net of tax	(140)	(4)	(361)	18
Net income (loss) available to common shareholders	$ (333)	$ 107	$ (502)	$ 397
Weighted average common shares outstanding
Basic (in shares)	126,300,000	138,400,000	127,800,000	143,100,000
Dilutive Effects:
Diluted (in shares)	126,300,000	144,300,000	127,800,000	148,500,000
Basic [Abstract]
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders (usd per share)	$ (1.53)	$ 0.80	$ (1.11)	$ 2.65
Income (loss) from discontinued operations, net of taxes available to Voya Financial, Inc.'s common shareholders (usd per share)	(1.11)	(0.03)	(2.82)	0.12
Income (loss) available to Voya Financial, Inc.'s common shareholders (usd per share)	(2.64)	0.77	(3.93)	2.77
Diluted [Abstract]
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders (usd per share)	(1.53)	0.77	(1.11)	2.55
Income (loss) from discontinued operations, net of taxes available to Voya Financial, Inc.'s common shareholders (usd per share)	(1.11)	(0.03)	(2.82)	0.12
Income (loss) available to Voya Financial, Inc.'s common shareholders (usd per share)	$ (2.64)	$ 0.74	$ (3.93)	$ 2.67
Warrant
Dilutive Effects:
Dilutive Effects (in shares)	0.6		1.2
Restricted Stock Unit (RSU) awards
Dilutive Effects:
Dilutive Effects (in shares)	0.9		0.9
Performance Stock Unit (PSU) awards
Dilutive Effects:
Dilutive Effects (in shares)	1.3		1.3
Stock options
Dilutive Effects:
Dilutive Effects (in shares)	0.4		0.4
Warrant
Dilutive Effects:
Dilutive Effects (in shares)	0	2,300,000	0	1,600,000
Restricted Stock Unit (RSU) awards
Dilutive Effects:
Dilutive Effects (in shares)	0	1,300,000	0	1,300,000
Performance Stock Unit (PSU) awards
Dilutive Effects:
Dilutive Effects (in shares)	0	1,700,000	0	1,900,000
Stock options
Dilutive Effects:
Dilutive Effects (in shares)	0	600,000	0	600,000