Condensed Consolidating Financial Information - Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Investments:
Fixed maturities, available-for-sale, at fair value	$ 70,155.7	$ 68,317.8
Fixed maturities, at fair value using the fair value option	3,557.8	2,935.3
Equity securities, available-for-sale	270.5	314.4
Short-term investments	1,173.1	1,048.1
Mortgage loans on real estate, net of valuation allowance	9,949.7	9,312.2
Policy loans	2,104.2	2,147.0
Limited partnerships/corporations	348.2	236.4
Derivatives	1,136.8	1,149.3
Intercompany Transaction, Investment In Subsidiary	0	0
Other investments	106.8	124.6
Securities pledged	1,021.6	1,465.7
Total investments	89,824.4	87,050.8
Cash and cash equivalents	1,908.5	2,840.8	1,716.6	1,786.8
Short-term investments under securities loan agreements, including collateral delivered	593.8	552.9
Accrued investment income	926.9	897.1
Reinsurance recoverable	6,752.5	6,702.2
Deferred policy acquisition costs and Value of business acquired	4,779.9	5,351.6	5,265.0	3,656.3
Sales inducements to contract holders	259.9	279.0
Current income taxes	8.4	0
Deferred income taxes		162.1
Goodwill and other intangible assets	296.1	323.7
Loans to subsidiaries and affiliates	0	0
Due from subsidiaries and affiliates	0	0
Other assets	1,051.4	1,036.5
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	3,842.8	3,218.6
Cash and cash equivalents	560.9	710.7
Corporate loans, at fair value using the fair value option	6,262.9	4,965.3
Other assets	176.1	104.8
Assets held in separate accounts	107,059.3	106,827.1
Total assets	224,303.8	221,023.2
Liabilities and Shareholder's Equity:
Future policy benefits	15,048.1	14,098.4
Contract owner account balances	69,091.0	69,908.3
Payables under securities loan agreements, including collateral held	927.1	769.4
Short-term debt with affiliates	0	0
Long-term debt	3,515.5	3,514.7
Funds held under reinsurance agreements	1,136.7	1,181.5
Derivatives	656.8	1,351.8
Pension and other post-employment provisions	454.2	474.9
Current income taxes	0	44.1
Deferred income taxes	447.4	0
Due to subsidiaries and affiliates	0	0
Other liabilities	1,315.8	1,274.1
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	6,344.4	5,161.6
Other liabilities	1,163.3	903.3
Liabilities related to separate accounts	107,059.3	106,827.1
Total liabilities	207,159.6	205,509.2
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	14,585.1	13,272.2
Noncontrolling interest	2,559.1	2,241.8
Total shareholders' equity	17,144.2	15,514.0	14,864.5	16,061.2
Total liabilities and shareholder's equity	224,303.8	221,023.2
Parent Issuer
Investments:
Fixed maturities, available-for-sale, at fair value	0	0
Fixed maturities, at fair value using the fair value option	0	0
Equity securities, available-for-sale	81.8	76.6
Short-term investments	0	0
Mortgage loans on real estate, net of valuation allowance	0	0
Policy loans	0	0
Limited partnerships/corporations	0	0
Derivatives	66.5	69.9
Intercompany Transaction, Investment In Subsidiary	16,591.1	15,103.8
Other investments	0	0
Securities pledged	0	0
Total investments	16,739.4	15,250.3
Cash and cash equivalents	474.0	640.2	464.3	357.5
Short-term investments under securities loan agreements, including collateral delivered	30.7	30.7
Accrued investment income	0	0
Reinsurance recoverable	0	0
Deferred Policy Acquisition Costs	0	0
Sales inducements to contract holders	0	0
Current income taxes	52.4
Deferred income taxes		204.4
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	206.3	211.3
Due from subsidiaries and affiliates	12.6	26.9
Other assets	51.3	43.4
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	0	0
Cash and cash equivalents	0	0
Corporate loans, at fair value using the fair value option	0	0
Other assets	0	0
Assets held in separate accounts	0	0
Total assets	17,566.7	16,407.2
Liabilities and Shareholder's Equity:
Future policy benefits	0	0
Contract owner account balances	0	0
Payables under securities loan agreements, including collateral held	0	0
Short-term debt with affiliates	0	0
Long-term debt	2,997.0	2,996.7
Funds held under reinsurance agreements	0	0
Derivatives	99.4	114.0
Pension and other post-employment provisions	0	0
Current income taxes		(47.0)
Deferred income taxes	(176.4)
Due to subsidiaries and affiliates	3.2	0.2
Other liabilities	58.4	71.1
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	0	0
Other liabilities	0	0
Liabilities related to separate accounts	0	0
Total liabilities	2,981.6	3,135.0
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	14,585.1	13,272.2
Noncontrolling interest	0	0
Total shareholders' equity	14,585.1	13,272.2
Total liabilities and shareholder's equity	17,566.7	16,407.2
Subsidiary Guarantor
Investments:
Fixed maturities, available-for-sale, at fair value	0	0
Fixed maturities, at fair value using the fair value option	0	0
Equity securities, available-for-sale	0	20.6
Short-term investments	0	0
Mortgage loans on real estate, net of valuation allowance	0	0
Policy loans	0	0
Limited partnerships/corporations	0	0
Derivatives	0	0
Intercompany Transaction, Investment In Subsidiary	13,155.6	12,572.7
Other investments	3.9	0.4
Securities pledged	0	0
Total investments	13,159.5	12,593.7
Cash and cash equivalents	3.7	1.1	0.6	0.4
Short-term investments under securities loan agreements, including collateral delivered	0	0
Accrued investment income	0	0
Reinsurance recoverable	0	0
Deferred Policy Acquisition Costs	0	0
Sales inducements to contract holders	0	0
Current income taxes	(9.2)
Deferred income taxes		0
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	0.1	0
Due from subsidiaries and affiliates	0.1	0.6
Other assets	0	0
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	0	0
Cash and cash equivalents	0	0
Corporate loans, at fair value using the fair value option	0	0
Other assets	0	0
Assets held in separate accounts	0	0
Total assets	13,154.2	12,595.4
Liabilities and Shareholder's Equity:
Future policy benefits	0	0
Contract owner account balances	0	0
Payables under securities loan agreements, including collateral held	0	0
Short-term debt with affiliates	188.0	125.4
Long-term debt	515.1	514.7
Funds held under reinsurance agreements	0	0
Derivatives	0	0
Pension and other post-employment provisions	0	0
Current income taxes		10.6
Deferred income taxes	0
Due to subsidiaries and affiliates	1.2	1.5
Other liabilities	6.3	14.4
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	0	0
Other liabilities	0	0
Liabilities related to separate accounts	0	0
Total liabilities	710.6	666.6
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	12,443.6	11,928.8
Noncontrolling interest	0	0
Total shareholders' equity	12,443.6	11,928.8
Total liabilities and shareholder's equity	13,154.2	12,595.4
Non-Guarantor Subsidiaries
Investments:
Fixed maturities, available-for-sale, at fair value	70,171.0	68,333.2
Fixed maturities, at fair value using the fair value option	3,557.8	2,935.3
Equity securities, available-for-sale	188.7	217.2
Short-term investments	1,173.1	1,048.1
Mortgage loans on real estate, net of valuation allowance	9,949.7	9,312.2
Policy loans	2,104.2	2,147.0
Limited partnerships/corporations	348.2	236.4
Derivatives	1,236.2	1,261.8
Intercompany Transaction, Investment In Subsidiary	0	0
Other investments	102.9	124.2
Securities pledged	1,021.6	1,465.7
Total investments	89,853.4	87,081.1
Cash and cash equivalents	1,430.8	2,199.5	1,251.7	1,428.9
Short-term investments under securities loan agreements, including collateral delivered	583.2	542.3
Accrued investment income	926.9	897.1
Reinsurance recoverable	6,752.5	6,702.2
Deferred Policy Acquisition Costs	4,779.9	5,351.6
Sales inducements to contract holders	259.9	279.0
Current income taxes	(34.8)
Deferred income taxes		(42.3)
Goodwill and other intangible assets	296.1	323.7
Loans to subsidiaries and affiliates	0.5	0.3
Due from subsidiaries and affiliates	4.4	1.7
Other assets	1,000.8	995.1
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	3,842.8	3,218.6
Cash and cash equivalents	560.9	710.7
Corporate loans, at fair value using the fair value option	6,262.9	4,965.3
Other assets	176.1	104.8
Assets held in separate accounts	107,059.3	106,827.1
Total assets	223,755.6	220,157.8
Liabilities and Shareholder's Equity:
Future policy benefits	15,048.1	14,098.4
Contract owner account balances	69,091.0	69,908.3
Payables under securities loan agreements, including collateral held	927.1	769.4
Short-term debt with affiliates	18.2	85.9
Long-term debt	18.7	18.7
Funds held under reinsurance agreements	1,136.7	1,181.5
Derivatives	723.3	1,420.2
Pension and other post-employment provisions	454.2	474.9
Current income taxes		80.5
Deferred income taxes	623.8
Due to subsidiaries and affiliates	(2.3)	12.5
Other liabilities	1,287.6	1,226.0
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	6,344.4	5,161.6
Other liabilities	1,163.3	903.3
Liabilities related to separate accounts	107,059.3	106,827.1
Total liabilities	203,893.4	202,168.3
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	17,303.1	15,747.7
Noncontrolling interest	2,559.1	2,241.8
Total shareholders' equity	19,862.2	17,989.5
Total liabilities and shareholder's equity	223,755.6	220,157.8
Consolidating Adjustments
Investments:
Fixed maturities, available-for-sale, at fair value	(15.3)	(15.4)
Fixed maturities, at fair value using the fair value option	0	0
Equity securities, available-for-sale	0	0
Short-term investments	0	0
Mortgage loans on real estate, net of valuation allowance	0	0
Policy loans	0	0
Limited partnerships/corporations	0	0
Derivatives	(165.9)	(182.4)
Intercompany Transaction, Investment In Subsidiary	(29,746.7)	(27,676.5)
Other investments	0	0
Securities pledged	0	0
Total investments	(29,927.9)	(27,874.3)
Cash and cash equivalents	0	0	0	0
Short-term investments under securities loan agreements, including collateral delivered	(20.1)	(20.1)
Accrued investment income	0	0
Reinsurance recoverable	0	0
Deferred Policy Acquisition Costs	0	0
Sales inducements to contract holders	0	0
Current income taxes	0
Deferred income taxes		0
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	(206.9)	(211.6)
Due from subsidiaries and affiliates	(17.1)	(29.2)
Other assets	(0.7)	(2.0)
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	0	0
Cash and cash equivalents	0	0
Corporate loans, at fair value using the fair value option	0	0
Other assets	0	0
Assets held in separate accounts	0	0
Total assets	(30,172.7)	(28,137.2)
Liabilities and Shareholder's Equity:
Future policy benefits	0	0
Contract owner account balances	0	0
Payables under securities loan agreements, including collateral held	0	0
Short-term debt with affiliates	(206.2)	(211.3)
Long-term debt	(15.3)	(15.4)
Funds held under reinsurance agreements	0	0
Derivatives	(165.9)	(182.4)
Pension and other post-employment provisions	0	0
Current income taxes		0
Deferred income taxes	0
Due to subsidiaries and affiliates	(2.1)	(14.2)
Other liabilities	(36.5)	(37.4)
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	0	0
Other liabilities	0	0
Liabilities related to separate accounts	0	0
Total liabilities	(426.0)	(460.7)
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	(29,746.7)	(27,676.5)
Noncontrolling interest	0	0
Total shareholders' equity	(29,746.7)	(27,676.5)
Total liabilities and shareholder's equity	$ (30,172.7)	$ (28,137.2)