EMPLOYEE STOCK BENEFIT PLANS (Details 3) (USD $)	6 Months Ended
	Jun. 30, 2013
Stock options
Number of options
Outstanding as of beginning of the period (in shares)	8,025,194
Granted (in shares)	1,089,658
Exercised (in shares)	(898,992)
Canceled (in shares)	(35,976)
Outstanding as of end of the period (in shares)	8,179,884
Vested and exercisable as of end of the period (in shares)	4,740,039
Weighted Average Exercise Price
Outstanding as of beginning of the period (in dollars per share)	$ 27.31
Granted (in dollars per share)	$ 42.86
Exercised (in dollars per share)	$ 19.11
Canceled (in dollars per share)	$ 34.14
Outstanding as of end of the period (in dollars per share)	$ 30.26
Vested and exercisable as of end of the period (in dollars per share)	$ 24.33
Weighted average grant-date fair value of options granted during the period (in dollars per share)	$ 13.72
Restricted stock units
Number of restricted stock units
Nonvested as of beginning of the period (in shares)	735,939
Granted (in shares)	400,166
Vested (in shares)	(265,942)
Forfeited (in shares)	(5,964)
Nonvested as of end of the period (in shares)	864,199
Weighted Average Grant Date Fair Value
Nonvested stock as of beginning of the period (in dollars per share)	$ 35.33
Granted (in dollars per share)	$ 42.32
Vested (in dollars per share)	$ 32.09
Forfeited (in dollars per share)	$ 34.77
Nonvested stock as of end of the period (in dollars per share)	$ 39.57