Business, Basis of Presentation and Significant Accounting Policies (Details)	0 Months Ended			3 Months Ended	9 Months Ended		0 Months Ended
	Sep. 08, 2014	Mar. 31, 2014	Mar. 25, 2014	Jun. 30, 2014	Sep. 30, 2014 segments	Sep. 30, 2013	Sep. 08, 2014 Voya Financial, Inc.	Mar. 25, 2014 Voya Financial, Inc.	Oct. 29, 2013 Voya Financial, Inc.	May 07, 2013 Voya Financial, Inc.	May 07, 2013 ING Group	Sep. 08, 2014 ING Group	Mar. 25, 2014 ING Group	Oct. 29, 2013 ING Group
Schedule of Equity Transactions [Line Items]
Offering of shares by parent company and subsidiaries					0	30,800,000	22,277,993	30,475,000	37,950,000	30,769,230	44,201,773
Shares repurchased	7,722,007	250,000	7,255,853	875,558			7,722,007	7,255,853
Ownership by affiliate of parent company												32.50%	43.00%	57.00%
Number of reportable segments					3
Number of operating segments					5