Condensed Consolidating Financial Information - Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Net investment income	$ 1,145.6	$ 1,198.7
Fee income	931.8	891.9
Premiums	600.9	471.9
Net realized gains (losses):
Total other-than-temporary impairments	(3.3)	(11.6)
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	0	(0.6)
Net other-than-temporary impairments recognized in earnings	(3.3)	(11.0)
Other net realized capital gains (losses)	(187.3)	(863.8)
Total net realized capital gains (losses)	(190.6)	(874.8)
Other revenue	105.5	95.6
Income (loss) related to consolidated investment entities:
Net investment income (loss)	81.5	44.2
Changes in fair value related to collateralized loan obligations	(3.8)	(8.9)
Total revenues	2,670.9	1,818.6
Benefits and expenses:
Policyholder benefits	865.0	540.5
Interest credited to contract owner account balance	493.1	520.9
Operating expenses	789.5	759.1
Net amortization of deferred policy acquisition costs and value of business acquired	126.1	130.5
Interest expense	47.6	44.4
Operating expenses related to consolidated investment entities:
Interest expense	46.2	36.8
Other expense	1.1	0.7
Total benefits and expenses	2,368.6	2,032.9
Income (loss) before income taxes	302.3	(214.3)
Income tax expense (benefit)	30.7	11.2
Net income (loss) before equity in earnings (losses) of unconsolidated affiliates	271.6	(225.5)
Equity in earnings (losses) of subsidiaries, net of tax	0	0
Net income (loss) including noncontrolling interest	271.6	(225.5)
Less: Net income (loss) attributable to noncontrolling interest	13.5	(13.5)
Net income (loss) available to Voya Financial, Inc.'s common shareholders	258.1	(212.0)
Parent Issuer
Revenues:
Net investment income	2.0	25.0
Fee income	0	0
Premiums	0	0
Net realized gains (losses):
Total other-than-temporary impairments	0	0
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	0	0
Net other-than-temporary impairments recognized in earnings	0	0
Other net realized capital gains (losses)	0.6	0
Total net realized capital gains (losses)	0.6	0
Other revenue	0.9	2.1
Income (loss) related to consolidated investment entities:
Net investment income (loss)	0	0
Changes in fair value related to collateralized loan obligations	0	0
Total revenues	3.5	27.1
Benefits and expenses:
Policyholder benefits	0	0
Interest credited to contract owner account balance	0	0
Operating expenses	1.5	2.7
Net amortization of deferred policy acquisition costs and value of business acquired	0	0
Interest expense	37.2	27.4
Operating expenses related to consolidated investment entities:
Interest expense	0	0
Other expense	0	0
Total benefits and expenses	38.7	30.1
Income (loss) before income taxes	(35.2)	(3.0)
Income tax expense (benefit)	0	(2.0)
Net income (loss) before equity in earnings (losses) of unconsolidated affiliates	(35.2)	(1.0)
Equity in earnings (losses) of subsidiaries, net of tax	293.3	(211.0)
Net income (loss) including noncontrolling interest	258.1	(212.0)
Less: Net income (loss) attributable to noncontrolling interest	0	0
Net income (loss) available to Voya Financial, Inc.'s common shareholders	258.1	(212.0)
Subsidiary Guarantor
Revenues:
Net investment income	0	0.1
Fee income	0	0
Premiums	0	0
Net realized gains (losses):
Total other-than-temporary impairments	0	0
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	0	0
Net other-than-temporary impairments recognized in earnings	0	0
Other net realized capital gains (losses)	0	0
Total net realized capital gains (losses)	0	0
Other revenue	0	0.3
Income (loss) related to consolidated investment entities:
Net investment income (loss)	0	0
Changes in fair value related to collateralized loan obligations	0	0
Total revenues	0	0.4
Benefits and expenses:
Policyholder benefits	0	0
Interest credited to contract owner account balance	0	0
Operating expenses	0	0
Net amortization of deferred policy acquisition costs and value of business acquired	0	0
Interest expense	10.5	15.5
Operating expenses related to consolidated investment entities:
Interest expense	0	0
Other expense	0	0
Total benefits and expenses	10.5	15.5
Income (loss) before income taxes	(10.5)	(15.1)
Income tax expense (benefit)	3.3	(5.7)
Net income (loss) before equity in earnings (losses) of unconsolidated affiliates	(13.8)	(9.4)
Equity in earnings (losses) of subsidiaries, net of tax	14.3	(219.4)
Net income (loss) including noncontrolling interest	0.5	(228.8)
Less: Net income (loss) attributable to noncontrolling interest	0	0
Net income (loss) available to Voya Financial, Inc.'s common shareholders	0.5	(228.8)
Non-Guarantor Subsidiaries
Revenues:
Net investment income	1,144.9	1,174.3
Fee income	931.8	891.9
Premiums	600.9	471.9
Net realized gains (losses):
Total other-than-temporary impairments	(3.3)	(11.6)
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	0	(0.6)
Net other-than-temporary impairments recognized in earnings	(3.3)	(11.0)
Other net realized capital gains (losses)	(187.9)	(863.8)
Total net realized capital gains (losses)	(191.2)	(874.8)
Other revenue	105.5	96.1
Income (loss) related to consolidated investment entities:
Net investment income (loss)	81.5	44.2
Changes in fair value related to collateralized loan obligations	(3.8)	(8.9)
Total revenues	2,669.6	1,794.7
Benefits and expenses:
Policyholder benefits	865.0	540.5
Interest credited to contract owner account balance	493.1	520.9
Operating expenses	788.9	759.3
Net amortization of deferred policy acquisition costs and value of business acquired	126.1	130.5
Interest expense	1.2	2.2
Operating expenses related to consolidated investment entities:
Interest expense	46.2	36.8
Other expense	1.1	0.7
Total benefits and expenses	2,321.6	1,990.9
Income (loss) before income taxes	348.0	(196.2)
Income tax expense (benefit)	22.1	18.9
Net income (loss) before equity in earnings (losses) of unconsolidated affiliates	325.9	(215.1)
Equity in earnings (losses) of subsidiaries, net of tax	0	0
Net income (loss) including noncontrolling interest	325.9	(215.1)
Less: Net income (loss) attributable to noncontrolling interest	13.5	(13.5)
Net income (loss) available to Voya Financial, Inc.'s common shareholders	312.4	(201.6)
Consolidating Adjustments
Revenues:
Net investment income	(1.3)	(0.7)
Fee income	0	0
Premiums	0	0
Net realized gains (losses):
Total other-than-temporary impairments	0	0
Less: Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)	0	0
Net other-than-temporary impairments recognized in earnings	0	0
Other net realized capital gains (losses)	0	0
Total net realized capital gains (losses)	0	0
Other revenue	(0.9)	(2.9)
Income (loss) related to consolidated investment entities:
Net investment income (loss)	0	0
Changes in fair value related to collateralized loan obligations	0	0
Total revenues	(2.2)	(3.6)
Benefits and expenses:
Policyholder benefits	0	0
Interest credited to contract owner account balance	0	0
Operating expenses	(0.9)	(2.9)
Net amortization of deferred policy acquisition costs and value of business acquired	0	0
Interest expense	(1.3)	(0.7)
Operating expenses related to consolidated investment entities:
Interest expense	0	0
Other expense	0	0
Total benefits and expenses	(2.2)	(3.6)
Income (loss) before income taxes	0	0
Income tax expense (benefit)	5.3	0
Net income (loss) before equity in earnings (losses) of unconsolidated affiliates	(5.3)	0
Equity in earnings (losses) of subsidiaries, net of tax	(307.6)	430.4
Net income (loss) including noncontrolling interest	(312.9)	430.4
Less: Net income (loss) attributable to noncontrolling interest	0	0
Net income (loss) available to Voya Financial, Inc.'s common shareholders	$ (312.9)	$ 430.4