Schedule II - Condensed Financial Information of Parent - Statements of Comprehensive Income (Details) - 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
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (766)	$ 140	$ 252	$ 73	$ 177	$ 168	$ 229	$ 446	$ (301)	$ 1,020	$ (2,775)
Other comprehensive income (loss), after tax									2,381	(2,096)	810
Comprehensive income (loss) attributable to Voya Financial, Inc.									2,030	(1,221)	(2,182)
Parent Issuer
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(351)	875	(2,992)
Other comprehensive income (loss), after tax									2,381	(2,096)	810
Comprehensive income (loss) attributable to Voya Financial, Inc.									$ 2,030	$ (1,221)	$ (2,182)