Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Net investment income	$ 3,294	$ 3,354	$ 3,343
Fee income	2,627	2,471	2,470
Premiums	2,121	2,795	2,554
Net realized gains (losses):
Total other-than-temporary impairments	(30)	(32)	(78)
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	(9)	2	5
Net other-than-temporary impairments recognized in earnings	(21)	(34)	(83)
Other net realized capital gains (losses)	(206)	(329)	(477)
Total net realized capital gains (losses)	(227)	(363)	(560)
Other revenue	371	342	385
Net investment income	432	189	551
Changes in fair value related to collateralized loan obligations	0	0	(27)
Total revenues	8,618	8,788	8,716
Benefits and expenses:
Policyholder benefits	3,030	3,710	3,161
Interest credited to contract owner account balances	1,606	1,604	1,537
Operating expenses	2,654	2,655	2,684
Net amortization of Deferred policy acquisition costs and Value of business acquired	529	415	377
Interest expense	184	288	197
Interest expense	80	102	272
Other expense	7	4	12
Total benefits and expenses	8,090	8,778	8,240
Income (loss) from continuing operations before income taxes	528	10	476
Income tax expense (benefit)	740	(29)	84
Income (loss) from continuing operations	(212)	39	392
Income (loss) from discontinued operations, net of tax	(2,580)	(337)	146
Net income (loss)	(2,792)	(298)	538
Less: Net income (loss) attributable to noncontrolling interest	200	29	130
Net income (loss) available to Voya Financial, Inc.'s common shareholders	$ (2,992)	$ (327)	$ 408
Net income (loss) per common share:
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders, Basic (usd per share)	$ (2.24)	$ 0.05	$ 1.16
Net income (loss) available to common shareholders, Basic (usd per share)	(16.25)	(1.63)	1.81
Income (loss) from continuing operations available to Voya Financial, Inc.'s common shareholders, Diluted (usd per share)	(2.24)	0.05	1.15
Net income (loss) available to common shareholders, Diluted (usd per share)	(16.25)	(1.61)	1.80
Cash dividends declared per share of common stock (usd per share)	$ 0.04	$ 0.04	$ 0.04