Condensed Consolidating Financial Information - Statements of Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 271.6	$ (225.5)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	1,110.1	(399.9)
Other-than-temporary impairments	15.6	10.9
Pension and other post-employment benefit liability	(3.4)	(3.5)
Other comprehensive income (loss), before tax	1,122.3	(392.5)
Income tax expense (benefit) related to items of other comprehensive income (loss)	393.9	(134.6)
Other comprehensive income (loss), after tax	728.4	(257.9)
Comprehensive income (loss)	1,000.0	(483.4)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	13.5	(13.5)
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	986.5	(469.9)
Parent Issuer
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	258.1	(212.0)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	1,110.1	(399.9)
Other-than-temporary impairments	15.6	10.9
Pension and other post-employment benefit liability	(3.4)	(3.5)
Other comprehensive income (loss), before tax	1,122.3	(392.5)
Income tax expense (benefit) related to items of other comprehensive income (loss)	393.9	(134.6)
Other comprehensive income (loss), after tax	728.4	(257.9)
Comprehensive income (loss)	986.5	(469.9)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	986.5	(469.9)
Subsidiary Guarantor
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	0.5	(228.8)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	767.7	(137.0)
Other-than-temporary impairments	13.2	6.9
Pension and other post-employment benefit liability	(0.8)	(0.8)
Other comprehensive income (loss), before tax	780.1	(130.9)
Income tax expense (benefit) related to items of other comprehensive income (loss)	274.1	(44.9)
Other comprehensive income (loss), after tax	506.0	(86.0)
Comprehensive income (loss)	506.5	(314.8)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	506.5	(314.8)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	325.9	(215.1)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	1,113.2	(397.8)
Other-than-temporary impairments	15.6	10.9
Pension and other post-employment benefit liability	(3.4)	(3.4)
Other comprehensive income (loss), before tax	1,125.4	(390.3)
Income tax expense (benefit) related to items of other comprehensive income (loss)	393.5	(133.8)
Other comprehensive income (loss), after tax	731.9	(256.5)
Comprehensive income (loss)	1,057.8	(471.6)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	13.5	(13.5)
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	1,044.3	(458.1)
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(312.9)	430.4
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	(1,880.9)	534.8
Other-than-temporary impairments	(28.8)	(17.8)
Pension and other post-employment benefit liability	4.2	4.2
Other comprehensive income (loss), before tax	(1,905.5)	521.2
Income tax expense (benefit) related to items of other comprehensive income (loss)	(667.6)	178.7
Other comprehensive income (loss), after tax	(1,237.9)	342.5
Comprehensive income (loss)	(1,550.8)	772.9
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	$ (1,550.8)	$ 772.9