STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended										0 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Restricted Stock Awards	Jun. 30, 2013 Restricted Stock Units	Jun. 30, 2013 Performance Share Awards item	Jun. 30, 2013 Performance Share Awards Greater than	Jun. 30, 2013 Performance Share Awards Less than or equal to	Jun. 30, 2013 Performance shares based on performance conditions	Jun. 30, 2013 Performance Share Awards Based on Internal Performance Metrics -3 Year Graded Vesting	Jun. 30, 2013 Performance Share Awards Based on Internal Metrics-Three Performance Metrics item	Feb. 21, 2013 Performance shares based on market conditions	Jun. 30, 2013 Performance shares based on market conditions item
Stock-Based Compensation arrangements
Stock based compensation expense	$ 10.0	$ 11.4	$ 28.7	$ 13.1
Granted (in shares)					2,050		402,250			274,760	84,990	189,770		127,490
Granted and fully vested (in shares)						23,576
Granted (in dollars per share)					$ 68.87	$ 53.75				$ 53.23			$ 46.12
Annual forfeiture rate assumption (as a percent)					6.00%			0.00%	6.00%
Number of types of performance awards granted to employees							3
Right to receive shares as percentage of award										100.00%
Number of years over which performance criteria is to be met							3 years
Minimum operating cash flow for the year preceding the performance period											$ 100
Number of criteria considered for awarding performance shares												3
Vesting rights											25% of the shares vest on each the first and second anniversary dates following the date of grant and 50% of the shares vest on the third anniversary following the date of the grant	An employee will earn one-third of the award granted for each internal performance metric that the Company meets at the end of the performance period.
Number of other companies in the Company's peer group														15
Assumptions:
Value per Share, low end of range (in dollars per share)														$ 46.09
Value per Share, high end of range (in dollars per share)														$ 70.96
Stock price volatility (as a percent)													43.80%
Risk free rate of return (as a percent)													0.40%
Expected dividend yield (as a percent)													0.20%	0.10%
Stock Price Volatility, low end of range (as a percent)														31.60%
Stock Price Volatility, high end of range (as a percent)														43.10%
Risk free rate of return, low end of range (as a percent)														0.10%
Risk free rate of return, high end of range (as a percent)														0.50%