Condensed Consolidating Financial Information - Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Investments:
Fixed maturities, available-for-sale, at fair value	$ 70,449.7	$ 68,317.8
Fixed maturities, at fair value using the fair value option	3,082.1	2,935.3
Equity securities, available-for-sale	276.6	314.4
Short-term investments	1,046.2	1,048.1
Mortgage loans on real estate, net of valuation allowance	9,258.1	9,312.2
Policy loans	2,119.7	2,147.0
Limited partnerships/corporations	218.9	236.4
Derivatives	1,044.7	1,149.3
Intercompany Transaction, Investment In Subsidiary	0	0
Other Investments	124.1	124.6
Securities pledged	1,271.3	1,465.7
Total investments	88,891.4	87,050.8
Cash and cash equivalents	2,499.8	2,840.8	2,787.7	1,786.8
Short-term investments under securities loan agreements, including collateral delivered	558.6	552.9
Accrued investment income	935.6	897.1
Reinsurance recoverable	6,785.8	6,702.2
Deferred policy acquisition costs and Value of business acquired	4,860.8	5,351.6	4,019.6	3,656.3
Sales inducements to contract holders	258.6	279.0
Deferred income taxes		162.1
Goodwill and other intangible assets	312.5	323.7
Loans to subsidiaries and affiliates	0	0
Due from subsidiaries and affiliates	0	0
Other assets	1,016.1	1,036.5
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	3,382.4	3,218.6
Cash and cash equivalents	570.0	710.7
Corporate loans, at fair value using the fair value option	5,490.7	4,965.3
Other assets	108.4	104.8
Assets held in separate accounts	107,840.0	106,827.1
Total assets	223,510.7	221,023.2
Liabilities and Shareholder's Equity:
Future policy benefits	14,532.6	14,098.4
Contract owner account balances	69,723.5	69,908.3
Payables under securities loan agreements, including collateral held	864.5	769.4
Short-term debt with affiliates	0	0
Long-term debt	3,515.0	3,514.7
Funds held under reinsurance agreements	1,174.5	1,181.5
Derivatives	1,013.5	1,351.8
Pension and other post-employment provisions	467.5	474.9
Current income taxes	3.5	44.1
Deferred income taxes	272.1	0
Due to subsidiaries and affiliates	0	0
Other liabilities	1,243.0	1,274.1
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	5,525.5	5,161.6
Other liabilities	967.5	903.3
Liabilities related to separate accounts	107,840.0	106,827.1
Total liabilities	207,142.7	205,509.2
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	14,001.5	13,272.2
Noncontrolling interest	2,366.5	2,241.8
Total shareholders' equity	16,368.0	15,514.0	15,598.9	16,061.2
Total liabilities and shareholder's equity	223,510.7	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	80.9	76.6
Short-term investments	21.0	0
Mortgage loans on real estate, net of valuation allowance	0	0
Policy loans	0	0
Limited partnerships/corporations	0	0
Derivatives	66.9	69.9
Intercompany Transaction, Investment In Subsidiary	16,071.5	15,103.8
Other Investments	0	0
Securities pledged	0	0
Total investments	16,240.3	15,250.3
Cash and cash equivalents	441.5	640.2	384.2	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
Deferred income taxes		204.4
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	370.0	211.3
Due from subsidiaries and affiliates	15.5	26.9
Other assets	57.4	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	17,155.4	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	180.0	0
Long-term debt	2,996.8	2,996.7
Funds held under reinsurance agreements	0	0
Derivatives	110.4	114.0
Pension and other post-employment provisions	0	0
Current income taxes	1.8	(47.0)
Deferred income taxes	(210.1)
Due to subsidiaries and affiliates	13.6	0.2
Other liabilities	61.4	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	3,153.9	3,135.0
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	14,001.5	13,272.2
Noncontrolling interest	0	0
Total shareholders' equity	14,001.5	13,272.2
Total liabilities and shareholder's equity	17,155.4	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	4.4	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	13,215.8	12,572.7
Other Investments	0.2	0.4
Securities pledged	0	0
Total investments	13,220.4	12,593.7
Cash and cash equivalents	1.5	1.1	0.3	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
Deferred income taxes		0
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	0.1	0
Due from subsidiaries and affiliates	1.0	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	13,223.0	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	260.5	125.4
Long-term debt	514.8	514.7
Funds held under reinsurance agreements	0	0
Derivatives	0	0
Pension and other post-employment provisions	0	0
Current income taxes	13.9	10.6
Deferred income taxes	0.3
Due to subsidiaries and affiliates	1.5	1.5
Other liabilities	5.5	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	796.5	666.6
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	12,426.5	11,928.8
Noncontrolling interest	0	0
Total shareholders' equity	12,426.5	11,928.8
Total liabilities and shareholder's equity	13,223.0	12,595.4
Non-Guarantor Subsidiaries
Investments:
Fixed maturities, available-for-sale, at fair value	70,465.1	68,333.2
Fixed maturities, at fair value using the fair value option	3,082.1	2,935.3
Equity securities, available-for-sale	191.3	217.2
Short-term investments	1,025.2	1,048.1
Mortgage loans on real estate, net of valuation allowance	9,258.1	9,312.2
Policy loans	2,119.7	2,147.0
Limited partnerships/corporations	218.9	236.4
Derivatives	1,155.1	1,261.8
Intercompany Transaction, Investment In Subsidiary	0	0
Other Investments	123.9	124.2
Securities pledged	1,271.3	1,465.7
Total investments	88,910.7	87,081.1
Cash and cash equivalents	2,056.8	2,199.5	2,403.2	1,428.9
Short-term investments under securities loan agreements, including collateral delivered	548.0	542.3
Accrued investment income	935.6	897.1
Reinsurance recoverable	6,785.8	6,702.2
Deferred Policy Acquisition Costs	4,860.8	5,351.6
Sales inducements to contract holders	258.6	279.0
Deferred income taxes		(42.3)
Goodwill and other intangible assets	312.5	323.7
Loans to subsidiaries and affiliates	180.6	0.3
Due from subsidiaries and affiliates	15.1	1.7
Other assets	959.4	995.1
Assets related to consolidated investment entities:
Limited partnerships/corporations, at fair value	3,382.4	3,218.6
Cash and cash equivalents	570.0	710.7
Corporate loans, at fair value using the fair value option	5,490.7	4,965.3
Other assets	108.4	104.8
Assets held in separate accounts	107,840.0	106,827.1
Total assets	223,215.4	220,157.8
Liabilities and Shareholder's Equity:
Future policy benefits	14,532.6	14,098.4
Contract owner account balances	69,723.5	69,908.3
Payables under securities loan agreements, including collateral held	864.5	769.4
Short-term debt with affiliates	109.5	85.9
Long-term debt	18.8	18.7
Funds held under reinsurance agreements	1,174.5	1,181.5
Derivatives	1,080.4	1,420.2
Pension and other post-employment provisions	467.5	474.9
Current income taxes	(12.2)	80.5
Deferred income taxes	481.9
Due to subsidiaries and affiliates	1.5	12.5
Other liabilities	1,212.6	1,226.0
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	5,525.5	5,161.6
Other liabilities	967.5	903.3
Liabilities related to separate accounts	107,840.0	106,827.1
Total liabilities	203,988.1	202,168.3
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	16,860.8	15,747.7
Noncontrolling interest	2,366.5	2,241.8
Total shareholders' equity	19,227.3	17,989.5
Total liabilities and shareholder's equity	223,215.4	220,157.8
Consolidating Adjustments
Investments:
Fixed maturities, available-for-sale, at fair value	(15.4)	(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	(177.3)	(182.4)
Intercompany Transaction, Investment In Subsidiary	(29,287.3)	(27,676.5)
Other Investments	0	0
Securities pledged	0	0
Total investments	(29,480.0)	(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
Deferred income taxes		0
Goodwill and other intangible assets	0	0
Loans to subsidiaries and affiliates	(550.7)	(211.6)
Due from subsidiaries and affiliates	(31.6)	(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	(30,083.1)	(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	(550.0)	(211.3)
Long-term debt	(15.4)	(15.4)
Funds held under reinsurance agreements	0	0
Derivatives	(177.3)	(182.4)
Pension and other post-employment provisions	0	0
Current income taxes	0	0
Deferred income taxes	0
Due to subsidiaries and affiliates	(16.6)	(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	(795.8)	(460.7)
Shareholder's equity:
Total Voya Financial, Inc. shareholders' equity	(29,287.3)	(27,676.5)
Noncontrolling interest	0	0
Total shareholders' equity	(29,287.3)	(27,676.5)
Total liabilities and shareholder's equity	$ (30,083.1)	$ (28,137.2)