Shareholders' Equity and Earnings per Common Share - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended							3 Months Ended				9 Months Ended			0 Months Ended
	Sep. 15, 2014	Sep. 08, 2014	Jul. 31, 2014	Mar. 31, 2014	Mar. 25, 2014	Mar. 13, 2014	May 07, 2013	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 15, 2014	Sep. 08, 2014 Voya Financial, Inc.	Jul. 31, 2014 Voya Financial, Inc.	May 28, 2014 Voya Financial, Inc.	Mar. 25, 2014 Voya Financial, Inc.	Feb. 07, 2014 Voya Financial, Inc.	Oct. 15, 2014 Subsequent Event	Oct. 30, 2014 Subsequent Event Voya Financial, Inc.	Sep. 15, 2014 Accelerated Share Repurchase [Member]
Class of Stock [Line Items]
Share repurchase program, authorized amount			$ 500.0			$ 300.0
Shares repurchased		7,722,007		250,000	7,255,853				875,558						7,722,007			7,255,853
Shares repurchased, value		300.0		8.9	250.0				30.5			609.4	0									20.0
Accelerated Share Repurchases, Settlement (Payment) or Receipt														25.0
Common stock acquired - share repurchase	505,305											(16,600,000)	0							150,152
Shares paid for tax withholding obligations												413,920
Number of warrants issued and outstanding							26,050,846
Percentage of issued warrants to total shares issued and outstanding							9.99%
Exercise price of warrants							48.75
Common stock, dividends, per share, cash paid								$ 0.01	$ 0.01	$ 0.01
Fair value of warrants issued							$ 94.0
Cash dividends declared per share of common stock							$ 0.01	$ 0.01			$ 0.01	$ 0.03	$ 0.01			$ 0.01	$ 0.01		$ 0.01		$ 0.01