EMPLOYEE STOCK BENEFIT PLANS (Details 2) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Stock options
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	0.4
Weighted-average grant date fair value (in dollars per share)	$ 20.24
Unrecognized Compensation Expense | $	$ 9.6
Expected Weighted-Average Period to be Recognized (years)	1 year 8 months 31 days
Performance share awards
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	0.2
Weighted-average grant date fair value (in dollars per share)	$ 98.74
Unrecognized Compensation Expense | $	$ 2.7
Expected Weighted-Average Period to be Recognized (years)	10 months 31 days
Restricted stock units
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	0.2
Weighted-average grant date fair value (in dollars per share)	$ 101.18
Unrecognized Compensation Expense | $	$ 28.8
Expected Weighted-Average Period to be Recognized (years)	2 years 4 months 15 days