STOCK BASED COMPENSATION - Stock Option Activity (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013
Number of Options
Outstanding at beginning of period	5,543,664
Granted	977,090
Canceled or expired	(296,974)
Outstanding at March 31, 2013	(48,286)
Outstanding at end of period	6,175,494.000
Exercisable at end of period	3,224,428
Vested and expected to vest in the future at end of period	5,200,557
Weighted Average Exercise Price per Share
Outstanding at beginning of period	$ 61.69
Granted	$ 95.89
Exercised	$ 48.98
Canceled or expired	$ 74.18
Outstanding at March 31, 2013	$ 67.61
Exercisable at end of period	$ 54.82
Vested and expected to vest in the future at end of period	$ 64.28
Weighted Average Remaining Contractual Life (in years)
Outstanding at end of period	7 years 0 months 29 days
Exercisable at end of period	5 years 9 months
Vested and expected to vest in the future at end of period	6 years 9 months
Aggregate Intrinsic Value
Outstanding at end of period	$ 238,175,533
Exercisable at end of period	165,599,626
Vested and expected to vest in the future at end of period	$ 217,924,044