Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Net investment income									$ 2,792.0	$ 2,669.0	$ 2,641.0
Fee income									1,969.0	1,982.0	1,889.0
Premiums									2,273.0	2,132.0	2,097.0
Net realized gains (losses):
Total other-than-temporary impairments									(65.0)	(27.0)	(29.0)
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)									(1.0)	1.0	(9.0)
Net other-than-temporary impairments recognized in earnings									(64.0)	(28.0)	(20.0)
Other net realized capital gains (losses)									(102.0)	(327.0)	(189.0)
Total net realized capital gains (losses)									(166.0)	(355.0)	(209.0)
Other revenue									465.0	443.0	379.0
Net investment income									143.0	292.0	432.0
Total revenues	$ 1,810.0	$ 1,875.0	$ 1,969.0	$ 1,822.0	$ 1,851.0	$ 1,890.0	$ 1,761.0	$ 1,661.0	7,476.0	7,163.0	7,229.0
Benefits and expenses:
Policyholder benefits									2,583.0	2,364.0	2,422.0
Interest credited to contract owner account balances									1,167.0	1,162.0	1,236.0
Operating expenses									2,746.0	2,606.0	2,562.0
Net amortization of Deferred policy acquisition costs and Value of business acquired									199.0	233.0	353.0
Interest expense									176.0	221.0	184.0
Interest expense									38.0	41.0	80.0
Other expense									7.0	8.0	7.0
Total benefits and expenses	1,744.0	1,726.0	1,726.0	1,720.0	1,725.0	1,661.0	1,596.0	1,653.0	6,916.0	6,635.0	6,844.0
Income (loss) from continuing operations before income taxes	66.0	149.0	243.0	102.0	126.0	229.0	165.0	8.0	560.0	528.0	385.0
Income tax expense (benefit)									(205.0)	37.0	687.0
Income (loss) from continuing operations									765.0	491.0	(302.0)
Income (loss) from discontinued operations, net of tax	(1,084.0)	(4.0)	42.0	(20.0)	29.0	(32.0)	92.0	440.0	(1,066.0)	529.0	(2,473.0)
Net income (loss)	(766.0)	140.0	252.0	73.0	177.0	168.0	229.0	446.0	(301.0)	1,020.0	(2,775.0)
Less: Net income (loss) attributable to noncontrolling interest	6.0	19.0	26.0	(1.0)	57.0	26.0	62.0	0.0	50.0	145.0	217.0
Net income (loss) available to Voya Financial, Inc.	(772.0)	121.0	226.0	74.0	120.0	142.0	167.0	446.0	(351.0)	875.0	(2,992.0)
Less: Preferred stock dividends	4.0	14.0	0.0	10.0	0.0	0.0	0.0	0.0	28.0	0.0	0.0
Net income (loss) available to Voya Financial, Inc.'s common shareholders	$ (776.0)	$ 107.0	$ 226.0	$ 64.0	$ 120.0	$ 142.0	$ 167.0	$ 446.0	$ (379.0)	$ 875.0	$ (2,992.0)
Net income (loss) per common share:
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders	$ 2.29	$ 0.80	$ 1.27	$ 0.57	$ 0.60	$ 1.09	$ 0.45	$ 0.03	$ 4.88	$ 2.12	$ (2.82)
Income (loss) available to Voya Financial, Inc.'s common shareholders	(5.76)	0.77	1.57	0.44	0.78	0.89	1.00	2.59	(2.69)	5.36	(16.25)
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders	2.17	0.77	1.22	0.56	0.58	1.06	0.43	0.03	4.68	2.05	(2.82)
Income (loss) available to Voya Financial, Inc.'s common shareholders	$ (5.45)	$ 0.74	$ 1.51	$ 0.42	$ 0.76	$ 0.87	$ 0.96	$ 2.50	$ (2.58)	$ 5.20	$ (16.25)