Share-Based Incentive Compensation Plans (Details) (USD $)	9 Months Ended			9 Months Ended		9 Months Ended		9 Months Ended			9 Months Ended						0 Months Ended					0 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 2013 Omnibus Plan	May 07, 2013 2013 Omnibus Plan	Sep. 30, 2014 2013 Omnibus Plan Performance shares	Dec. 31, 2013 2013 Omnibus Plan Performance shares	Sep. 30, 2014 2013 Omnibus Plan Restricted Stock Units (RSUs)	Dec. 31, 2013 2013 Omnibus Plan Restricted Stock Units (RSUs)	Sep. 30, 2014 2013 Omnibus Plan RSUs - Deal incentive awards		Dec. 31, 2013 2013 Omnibus Plan RSUs - Deal incentive awards	Sep. 30, 2014 Equity Compensation Plan Converted to Omnibus Plan Restricted Stock Units (RSUs)	Sep. 30, 2014 Deal Incentive Awards Converted to Omnibus Plan Restricted Stock Units (RSUs)	Sep. 30, 2014 2014 Omnibus Plan [Member] [Member]	Jul. 30, 2014 2014 Omnibus Plan [Member] [Member]	Jul. 30, 2014 2013 Non-Employee Director Incentive Plan	May 07, 2013 2013 Non-Employee Director Incentive Plan	Jun. 13, 2013 2013 Non-Employee Director Incentive Plan Cliff Vesting, Year One Non-Employee Directors	Jun. 13, 2013 2013 Non-Employee Director Incentive Plan Cliff Vesting, Year Two Non-Employee Directors	Jun. 13, 2013 2013 Non-Employee Director Incentive Plan Cliff Vesting, Year Three Non-Employee Directors	Sep. 30, 2014 Phantom Stock Plan Phantom Share Units (PSUs)	Sep. 30, 2014 Phantom Stock Plan Phantom Performance Shares	May 07, 2013 Long-term Sustainable Performance Plan Annual Vesting Non-Identified Staff	May 07, 2013 Long-term Sustainable Performance Plan Performance shares	Sep. 30, 2014 ING Group Share-based Compensation Plans Restricted Stock Units (RSUs)	Sep. 30, 2014 Minimum 2013 Omnibus Plan Performance shares	Sep. 30, 2014 Minimum 2013 Omnibus Plan Restricted Stock [Member]	Sep. 30, 2014 Maximum 2013 Omnibus Plan Performance shares	Sep. 30, 2014 Maximum 2013 Omnibus Plan Restricted Stock [Member]	Sep. 08, 2014 ING Group	Mar. 25, 2014 ING Group	Oct. 29, 2013 ING Group	Oct. 20, 2014 Subsequent Event Deal Incentive Awards Converted to Omnibus Plan Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance			7,650,000											17,800,000	288,000	88,000
Shares available for grant		239,283											17,800,000
Vesting percentage of grant																									0.00%		150.00%
Award vesting period											3 years													3 years	1 year	1 year	4 years	4 years
Number of stock options outstanding		0											0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Conversion, Equity Instruments Issued And Vested												891,928																				42,373
Number of awards vested during period												123,269
ERROR in label resolution.																	50.00%	25.00%	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 30.03			$ 36.98		$ 37.02		$ 30.03	[1]
Number of units granted				600,000	500,000	3,200,000	1,600,000	0		800,000										175,029	94,388
Percentage of vested awards delivered																						33.33%	33.33%
Ownership by affiliate of parent company																													32.50%	43.00%	57.00%

[1] 1) Excludes 123,269 of RSUs - Deal Incentive Awards granted in 2013 that proportionally vest upon sales of Company stock by ING Group.