STOCK BASED COMPENSATION - Options Outstanding and Exercisable by Price Range (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	5,334,803	5,377,857
Options Outstanding, Outstanding Average Remaining Life	5 years 8 months 12 days	6 years 1 month 6 days	6 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 92.02	$ 80.88
Options Exercisable, Shares	2,747,266
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 73.22
$29.54 - $51.55 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	912,043
Options Outstanding, Outstanding Average Remaining Life	3 years 1 month 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 47.61
Options Exercisable, Shares	912,043
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 47.61
Range of Exercise Price, Lower Range Limit	29.54
Range of Exercise Price, Upper Range Limit	$ 51.55
$52.05 - $85.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	956,708
Options Outstanding, Outstanding Average Remaining Life	4 years 2 months 19 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 72.90
Options Exercisable, Shares	817,286
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 70.84
Range of Exercise Price, Lower Range Limit	52.05
Range of Exercise Price, Upper Range Limit	$ 85.00
$85.02 - $85.76 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	10,650
Options Outstanding, Outstanding Average Remaining Life	6 years 3 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 85.40
Options Exercisable, Shares	5,750
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 85.37
Range of Exercise Price, Lower Range Limit	85.02
Range of Exercise Price, Upper Range Limit	$ 85.76
$86.24 - $86.24 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	604,758
Options Outstanding, Outstanding Average Remaining Life	6 years 1 month 2 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 86.24
Options Exercisable, Shares	302,334
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 86.24
Range of Exercise Price, Lower Range Limit	86.24
Range of Exercise Price, Upper Range Limit	$ 86.24
$86.83 - $95.03 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	142,097
Options Outstanding, Outstanding Average Remaining Life	6 years 7 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 89.83
Options Exercisable, Shares	110,895
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 89.11
Range of Exercise Price, Lower Range Limit	86.83
Range of Exercise Price, Upper Range Limit	$ 95.03
$95.87 - $95.87 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	781,470
Options Outstanding, Outstanding Average Remaining Life	7 years 1 month 13 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 95.87
Options Exercisable, Shares	299,599
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 95.87
Range of Exercise Price, Lower Range Limit	95.87
Range of Exercise Price, Upper Range Limit	$ 95.87
$95.92 - $115.51 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	162,252
Options Outstanding, Outstanding Average Remaining Life	7 years 3 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 110.41
Options Exercisable, Shares	102,739
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 109.94
Range of Exercise Price, Lower Range Limit	95.92
Range of Exercise Price, Upper Range Limit	$ 115.51
$115.69 - $115.69 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	732,411
Options Outstanding, Outstanding Average Remaining Life	6 years 1 month 21 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 115.69
Options Exercisable, Shares	147,361
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 115.69
Range of Exercise Price, Lower Range Limit	115.69
Range of Exercise Price, Upper Range Limit	$ 115.69
$115.82 - $130.11 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	128,583
Options Outstanding, Outstanding Average Remaining Life	7 years 8 months 5 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 122.59
Options Exercisable, Shares	15,954
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 117.80
Range of Exercise Price, Lower Range Limit	115.82
Range of Exercise Price, Upper Range Limit	$ 130.11
$130.19 - $141.56 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	903,831
Options Outstanding, Outstanding Average Remaining Life	7 years 3 months 29 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 131.20
Options Exercisable, Shares	33,305
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 133.49
Range of Exercise Price, Lower Range Limit	130.19
Range of Exercise Price, Upper Range Limit	$ 141.56
$29.54 - $141.56 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Shares	5,334,803
Options Outstanding, Outstanding Average Remaining Life	5 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 92.02
Options Exercisable, Shares	2,747,266
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 73.22
Range of Exercise Price, Lower Range Limit	29.54
Range of Exercise Price, Upper Range Limit	$ 141.56