EMPLOYEE STOCK BENEFIT PLANS (Details 2) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
EMPLOYEE STOCK BENEFIT PLANS
Unrecognized Compensation Expense	$ 76.4
Stock options
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	1.1
Weighted-average grant date fair value (in dollars per share) | $ / shares	$ 13.87
Unrecognized Compensation Expense	$ 20.3
Expected Weighted-Average Period to be Recognized (years)	2 years 29 days
Performance share awards
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	0.2
Weighted-average grant date fair value (in dollars per share) | $ / shares	$ 70.48
Unrecognized Compensation Expense	$ 10.6
Expected Weighted-Average Period to be Recognized (years)	1 year 6 months 9 days
Restricted stock units
EMPLOYEE STOCK BENEFIT PLANS
Shares granted | shares	0.3
Weighted-average grant date fair value (in dollars per share) | $ / shares	$ 73.76
Unrecognized Compensation Expense	$ 45.5
Expected Weighted-Average Period to be Recognized (years)	2 years 9 months 15 days