DEBT (Outstanding Debt) (Details) $ / shares in Units, $ in Thousands, € in Millions			1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($)	Aug. 20, 2014 USD ($) $ / shares	May 31, 2013 USD ($) $ / shares	Mar. 31, 2012 USD ($) $ / shares	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2010 USD ($)	Sep. 30, 2016 EUR (€)	May 23, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Nov. 25, 2015 EUR (€)	Mar. 13, 2015 USD ($)	Mar. 03, 2015 EUR (€)	Sep. 23, 2014 EUR (€)	Jun. 30, 2013 USD ($)	Mar. 31, 2010 USD ($) $ / shares
Debt Instrument
Outstanding Principal Amount, Long-term					$ 6,590,450		$ 6,590,450		$ 6,489,131
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(243,243)		(243,243)		(330,688)
Total Carrying Value of Long-Term Debt					6,347,207		6,347,207		6,158,443
Description of Senior Notes
Convertible debt					34,504		34,504		0
Estimated market value of outstanding debt					8,800,000		8,800,000		7,000,000
Amortization of debt discount included in interest expense							51,512	$ 49,868
1.00% Convertible Senior Notes Due March 2018 [Member]
Debt Instrument
Outstanding Principal Amount, Short-term					1,000,000		1,000,000
Outstanding Principal Amount, Long-term									1,000,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(39,016)		(39,016)		(58,929)
Total Carrying Value of Short-term Debt					$ 960,984		$ 960,984
Total Carrying Value of Long-Term Debt									$ 941,071
Description of Senior Notes
Aggregate Principal Amount				$ 1,000,000
Interest rate on Long-term Debt				1.00%	1.00%		1.00%		1.00%					1.00%		1.00%
Debt financing costs paid												$ 20,900
Convertible debt conversion price (in dollars per share) | $ / shares				$ 944.61
Ratio of closing share price to conversion price as a condition for conversion of convertible Senior Notes, minimum				150.00%
Effective interest rate at debt origination or modification				3.50%
Debt discount related to convertible notes, net of tax				$ 80,900
Debt discount related to convertible notes, before tax				135,200
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax				$ 2,800
0.35 % Convertible Senior Notes Due June 2020 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 1,000,000		$ 1,000,000		$ 1,000,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(96,485)		(96,485)		(114,898)
Total Carrying Value of Long-Term Debt					$ 903,515		$ 903,515		$ 885,102
Description of Senior Notes
Aggregate Principal Amount			$ 1,000,000
Interest rate on Long-term Debt			0.35%		0.35%		0.35%		0.35%					0.35%		0.35%
Debt Instrument, Initial Premium/(Discount)			$ 20,000
Debt financing costs paid											$ 1,000
Convertible debt conversion price (in dollars per share) | $ / shares			$ 1,315.10
Ratio of closing share price to conversion price as a condition for conversion of convertible Senior Notes, minimum			150.00%
Effective interest rate at debt origination or modification			3.13%
Debt discount related to convertible notes, net of tax																					$ 92,400
Debt discount related to convertible notes, before tax																					154,300
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax																					$ 100
Amortization of debt discount included in interest expense					$ 700	$ 700	$ 2,100	2,000
0.9% Convertible Senior Notes Due September 2021 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					1,000,000		1,000,000		$ 1,000,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(109,818)		(109,818)		(125,258)
Total Carrying Value of Long-Term Debt					$ 890,182		$ 890,182		$ 874,742
Description of Senior Notes
Aggregate Principal Amount		$ 1,000,000
Interest rate on Long-term Debt		0.90%			0.90%		0.90%		0.90%					0.90%		0.90%
Debt financing costs paid										$ 11,000
Convertible debt conversion price (in dollars per share) | $ / shares		$ 2,055.50
Ratio of closing share price to conversion price as a condition for conversion of convertible Senior Notes, minimum		150.00%
Effective interest rate at debt origination or modification		3.18%
Debt discount related to convertible notes, net of tax										82,500
Debt discount related to convertible notes, before tax										142,900
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax										1,600
2.15% Senior Notes Due November 2022 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 842,850		$ 842,850		$ 815,217
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(5,699)		(5,699)		(6,555)
Total Carrying Value of Long-Term Debt					$ 837,151		$ 837,151		$ 808,662
Description of Senior Notes
Aggregate Principal Amount | €														€ 750.0		€ 750.0	€ 750.0
Interest rate on Long-term Debt					2.15%		2.15%		2.15%					2.15%		2.15%	2.15%
Debt Instrument, Initial Premium/(Discount) | €																	€ 2.2
Debt financing costs paid									$ 3,700
Effective interest rate at debt origination or modification																	2.20%
2.375% Senior Notes Due September 2024 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 1,123,800		$ 1,123,800		1,086,957
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(13,781)		(13,781)		(14,688)
Total Carrying Value of Long-Term Debt					$ 1,110,019		$ 1,110,019		$ 1,072,269
Description of Senior Notes
Aggregate Principal Amount | €														€ 1,000.0		€ 1,000.0				€ 1,000.0
Interest rate on Long-term Debt					2.375%		2.375%		2.375%					2.375%		2.375%				2.375%
Debt Instrument, Initial Premium/(Discount) | €																				€ 9.4
Debt financing costs paid										$ 6,500
Effective interest rate at debt origination or modification																				2.48%
3.65% Senior Notes Due March 2025 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 500,000		$ 500,000		$ 500,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(3,835)		(3,835)		(4,160)
Total Carrying Value of Long-Term Debt					$ 496,165		$ 496,165		$ 495,840
Description of Senior Notes
Aggregate Principal Amount																		$ 500,000
Interest rate on Long-term Debt					3.65%		3.65%		3.65%					3.65%		3.65%		3.65%
Debt Instrument, Initial Premium/(Discount)																		$ 1,300
Debt financing costs paid									$ 3,200
Effective interest rate at debt origination or modification																		3.68%
3.6% Senior Notes Due June 2026 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 1,000,000		$ 1,000,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(7,814)		(7,814)
Total Carrying Value of Long-Term Debt					$ 992,186		$ 992,186
Description of Senior Notes
Aggregate Principal Amount															$ 1,000,000
Interest rate on Long-term Debt					3.60%		3.60%							3.60%	3.60%
Debt Instrument, Initial Premium/(Discount)															$ 1,900
Debt financing costs paid							$ 6,200
Effective interest rate at debt origination or modification															3.62%
1.8% Senior Notes Due March 2027 [Member]
Debt Instrument
Outstanding Principal Amount, Long-term					$ 1,123,800		1,123,800		1,086,957
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net					(5,811)		(5,811)		(6,200)
Total Carrying Value of Long-Term Debt					$ 1,117,989		$ 1,117,989		$ 1,080,757
Description of Senior Notes
Aggregate Principal Amount | €														€ 1,000.0		€ 1,000.0			€ 1,000.0
Interest rate on Long-term Debt					1.80%		1.80%		1.80%					1.80%		1.80%			1.80%
Debt Instrument, Initial Premium/(Discount) | €																			€ 0.3
Debt financing costs paid									$ 6,300
Effective interest rate at debt origination or modification																			1.80%
1.25% Convertible Senior Notes due March 2015 [Member]
Description of Senior Notes
Aggregate Principal Amount																						$ 575,000
Interest rate on Long-term Debt																						1.25%
Debt financing costs paid													$ 13,300
Convertible debt conversion price (in dollars per share) | $ / shares																						$ 303.06
Debt Conversion Cash Delivered for Principal Due on Converted Debt								37,500
Debt Conversion, Converted Instrument, Cash Paid								110,100
Convertible Debt [Member]
Description of Senior Notes
Interest expense related to debt					$ 23,700	23,100	$ 70,600	69,400
Coupon Interest expense					5,600	5,600	16,800	17,000
Amortization of debt discount included in interest expense					16,900	16,400	50,400	49,100
Amortization of debt issuance costs					$ 1,200	$ 1,100	$ 3,400	$ 3,300
Debt, Weighted Average Interest Rate					3.40%	3.41%	3.40%	3.43%
Other Long-term Debt [Member]
Description of Senior Notes
Interest expense related to debt					$ 30,800	$ 16,800	$ 77,700	$ 43,000
Coupon Interest expense					29,700	16,200	74,800	41,300
Amortization of debt discount included in interest expense					400	200	1,100	700
Amortization of debt issuance costs					700	$ 400	1,800	$ 1,000
1% CT Loan Due March 2016 [Member]
Description of Senior Notes
Aggregate Principal Amount	$ 2,500				$ 2,500		$ 2,500
Interest rate on Long-term Debt	1.00%				1.00%		1.00%							1.00%
Debt Instrument, Term	10 years
Minimum [Member] | 1.00% Convertible Senior Notes Due March 2018 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)				20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares				$ 0
Minimum [Member] | 0.35 % Convertible Senior Notes Due June 2020 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)			20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 0
Minimum [Member] | 0.9% Convertible Senior Notes Due September 2021 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)		20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares		$ 0
Maximum [Member] | 1.00% Convertible Senior Notes Due March 2018 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)				30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares				$ 344,000
Maximum [Member] | 0.35 % Convertible Senior Notes Due June 2020 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)			30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 397,000
Maximum [Member] | 0.9% Convertible Senior Notes Due September 2021 [Member]
Description of Senior Notes
Minimum and Maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days)		30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares		$ 375,000