Business, Basis of Presentation and Significant Accounting Policies (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	0 Months Ended							0 Months Ended
	Dec. 31, 2013 segment	Oct. 29, 2013 ING U.S. Inc	May 07, 2013 ING U.S. Inc	May 07, 2013 ING International	Oct. 29, 2013 ING International	Dec. 31, 2009 Accounting Standards Update 2010-26	Dec. 31, 2009 Retained Earnings (Deficit) Accounting Standards Update 2010-26	Dec. 31, 2009 Accumulated Other Comprehensive Income (Loss) Accounting Standards Update 2010-26	Mar. 25, 2014 Subsequent Event [Member] ING U.S. Inc
Item Effected [Line Items]
Offering of shares by parent company and subsidiaries			30,769,230	44,201,773
Offering of shares by parent company and subsidiaries		37,950,000							30,475,000
Shares acquired from parent in buyback									7,255,853
Ownership percentage by parent									43.00%
Implementation period of new brand name	24 months
Ownership by affiliate of parent company					57.00%
Number of operating segments	1
Rate required of collateral as a percent of market value of loans securities	102.00%
Cumulative effect on retained earnings, before tax							$ 375.9	$ 13.9
Cumulative effect on retained earnings, tax						$ 202.4