Consolidated Statements of Comprehensive Income - 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
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (766)	$ 140	$ 252	$ 73	$ 177	$ 168	$ 229	$ 446	$ (301)	$ 1,020	$ (2,775)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities									3,013	(2,810)	1,191
Other-than-temporary impairments									3	32	(2)
Pension and other postretirement benefits liability									(4)	(11)	(15)
Other comprehensive income (loss), before tax									3,012	(2,789)	1,174
Income tax expense (benefit) related to items of other comprehensive income (loss)									631	(693)	364
Other comprehensive income (loss), after tax									2,381	(2,096)	810
Comprehensive income (loss)									2,080	(1,076)	(1,965)
Less: Comprehensive income (loss) attributable to noncontrolling interest									50	145	217
Comprehensive income (loss) attributable to Voya Financial, Inc.									$ 2,030	$ (1,221)	$ (2,182)