Condensed Consolidating Financial Information - Statements of Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 517.4	$ 447.7	$ 1,201.9	$ 136.9
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	(510.8)	(223.2)	1,478.4	(2,733.4)
Other-than-temporary impairments	5.9	13.5	30.2	44.8
Pension and other post-employment benefit liability	(3.4)	(3.4)	(10.3)	(10.3)
Other comprehensive income (loss), before tax	(508.3)	(213.1)	1,498.3	(2,698.9)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(175.8)	(75.3)	527.2	(938.2)
Other comprehensive income (loss), after tax	(332.5)	(137.8)	971.1	(1,760.7)
Comprehensive income (loss)	184.9	309.9	2,173.0	(1,623.8)
Less: Comprehensive income (loss) attributable to noncontrolling interest	116.6	101.1	296.7	84.5
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	68.3	208.8	1,876.3	(1,708.3)
Parent Issuer
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	400.8	346.6	905.2	52.4
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	(510.8)	(223.2)	1,478.4	(2,733.4)
Other-than-temporary impairments	5.9	13.5	30.2	44.8
Pension and other post-employment benefit liability	(3.4)	(3.4)	(10.3)	(10.3)
Other comprehensive income (loss), before tax	(508.3)	(213.1)	1,498.3	(2,698.9)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(175.8)	(75.3)	527.2	(938.2)
Other comprehensive income (loss), after tax	(332.5)	(137.8)	971.1	(1,760.7)
Comprehensive income (loss)	68.3	208.8	1,876.3	(1,708.3)
Less: Comprehensive income (loss) attributable to noncontrolling interest	0	0	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	68.3	208.8	1,876.3	(1,708.3)
Subsidiary Guarantor
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	435.2	293.6	551.5	623.1
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	(408.7)	(92.4)	975.1	(1,750.6)
Other-than-temporary impairments	4.6	8.8	24.1	25.2
Pension and other post-employment benefit liability	(0.8)	(0.8)	(2.4)	(2.4)
Other comprehensive income (loss), before tax	(404.9)	(84.4)	996.8	(1,727.8)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(139.6)	(141.8)	351.7	(711.7)
Other comprehensive income (loss), after tax	(265.3)	57.4	645.1	(1,016.1)
Comprehensive income (loss)	169.9	351.0	1,196.6	(393.0)
Less: Comprehensive income (loss) attributable to noncontrolling interest	0	0	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	169.9	351.0	1,196.6	(393.0)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	629.2	391.5	1,411.2	138.9
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	(510.8)	(224.6)	1,482.4	(2,734.1)
Other-than-temporary impairments	5.9	13.5	30.2	44.8
Pension and other post-employment benefit liability	(3.4)	(3.4)	(10.3)	(10.3)
Other comprehensive income (loss), before tax	(508.3)	(214.5)	1,502.3	(2,699.6)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(175.8)	(75.4)	527.2	(938.0)
Other comprehensive income (loss), after tax	(332.5)	(139.1)	975.1	(1,761.6)
Comprehensive income (loss)	296.7	252.4	2,386.3	(1,622.7)
Less: Comprehensive income (loss) attributable to noncontrolling interest	116.6	101.1	296.7	84.5
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	180.1	151.3	2,089.6	(1,707.2)
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(947.8)	(584.0)	(1,666.0)	(677.5)
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on securities	919.5	317.0	(2,457.5)	4,484.7
Other-than-temporary impairments	(10.5)	(22.3)	(54.3)	(70.0)
Pension and other post-employment benefit liability	4.2	4.2	12.7	12.7
Other comprehensive income (loss), before tax	913.2	298.9	(2,499.1)	4,427.4
Income tax expense (benefit) related to items of other comprehensive income (loss)	315.4	217.2	(878.9)	1,649.7
Other comprehensive income (loss), after tax	597.8	81.7	(1,620.2)	2,777.7
Comprehensive income (loss)	(350.0)	(502.3)	(3,286.2)	2,100.2
Less: Comprehensive income (loss) attributable to noncontrolling interest	0	0	0	0
Comprehensive income (loss) attributable to Voya Financial, Inc.'s common shareholders	$ (350.0)	$ (502.3)	$ (3,286.2)	$ 2,100.2