Schedule II - Condensed Financial Information of Parent - Statements of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (160.4)	$ 116.2	$ 367.1	$ 215.7	$ 1,319.8	$ 522.4	$ 414.9	$ 275.6	$ 538.6	$ 2,532.7	$ 788.6
Other comprehensive income (loss), after tax									(1,678.8)	1,254.6	(1,861.6)
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders									(1,270.5)	3,549.6	(1,263.1)
Parent Issuer
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									408.3	2,315.7	598.5
Other comprehensive income (loss), after tax									(1,678.8)	1,254.6	(1,861.6)
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders									$ (1,270.5)	$ 3,570.3	$ (1,263.1)