DEBT (Revolving Credit Facility and Outstanding Debt) (Details)			1 Months Ended			3 Months Ended		12 Months Ended
	Jun. 19, 2015 USD ($)	Oct. 31, 2011 USD ($)	Aug. 31, 2014 USD ($) $ / shares	May. 31, 2013 USD ($) $ / shares	Mar. 31, 2012 USD ($) $ / shares	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2012 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Nov. 25, 2015 EUR (€)	Mar. 13, 2015 USD ($)	Mar. 03, 2015 EUR (€)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 USD ($)	Sep. 23, 2014 EUR (€)	Jun. 30, 2013 USD ($)	Mar. 31, 2010 USD ($) $ / shares
Debt Instrument
Line of Credit Facility, term (in years)	5 years	5 years
Letters of Credit Outstanding, Amount														$ 2,500,000					$ 4,000,000
Outstanding Principal Amount														6,489,131,000					4,210,068,000
Unamortized Debt Discount and Debt Issuance Cost														(330,688,000)					(386,198,000)
Carrying Value, Long Term														6,158,443,000					3,823,870,000
Estimated market value of outstanding senior notes														7,000,000,000					4,800,000,000
Amortization of debt discount								$ 66,687,000	$ 54,731,000	$ 55,718,000
Loss on early extinguishment of debt								3,000	6,270,000	26,661,000
Convertible Notes
Debt Instrument
Interest Expense, Debt								92,700,000	75,300,000	78,200,000
Contractual coupon interest related to convertible notes included in interest expense								22,600,000	17,100,000	17,700,000
Amortization of debt discount								65,600,000	54,400,000	55,700,000
Amortization of debt issuance costs included in interest expense								$ 4,500,000	$ 3,800,000	$ 4,800,000
Debt Instrument, Interest Rate During Period								3.40%	3.50%	4.40%
Loss on early extinguishment of debt									$ 6,300,000	$ 26,700,000
Loss on early extinguishment of debt, Net of Tax									3,800,000	16,200,000
Convertible Debt 1.25 Percent Due March 2015
Debt Instrument
Outstanding Principal Amount																			37,524,000
Unamortized Debt Discount and Debt Issuance Cost																			(374,000)
Carrying Value, Short-term Debt																			$ 37,150,000
Interest rate stated percentage (as a percent)																		1.25%	1.25%			1.25%
Reclassification Adjustment for Convertible Debt in Mezzanine									300,000
Debt Instrument, Face Amount																						$ 575,000,000
Payments of debt issuance costs												$ 13,300,000
Debt Instrument, Convertible, Conversion Price | $ / shares																						$ 303.06
Cash repayment of principal amount of convertible debt							$ 37,500,000		122,900,000	$ 414,600,000
Debt Conversion, Converted Instrument, Cash							$ 110,100,000		$ 2,200,000
Shares issued in satisfaction of conversion value in excess of principal amount (in shares) | shares									300,256	972,235
Debt discount related to convertible notes, net of tax																						$ 69,100,000
Debt discount related to convertible notes, before tax																						115,200,000
Finance costs related to convertible notes, net of tax																						$ 1,600,000
1.00% Convertible Senior Notes Due March 2018
Debt Instrument
Outstanding Principal Amount														1,000,000,000					$ 1,000,000,000
Unamortized Debt Discount and Debt Issuance Cost														(58,929,000)					(84,708,000)
Carrying Value, Long Term														$ 941,071,000					$ 915,292,000
Interest rate stated percentage (as a percent)					1.00%								1.00%	1.00%				1.00%	1.00%
Debt Instrument, Face Amount					$ 1,000,000,000
Payments of debt issuance costs											$ 20,900,000
Debt Instrument, Convertible, Conversion Price | $ / shares					$ 944.61
Ratio of closing share price to conversion price as a condition for conversion of convertible 2015 Senior Notes, minimum (as a percent)					150.00%
Debt Instrument, Interest Rate, Effective Percentage					3.50%
Debt discount related to convertible notes, net of tax					$ 80,900,000
Debt discount related to convertible notes, before tax					135,200,000
Finance costs related to convertible notes, net of tax					$ 2,800,000
0.35% Senior Convertible Notes Due June 2020
Debt Instrument
Outstanding Principal Amount														$ 1,000,000,000					$ 1,000,000,000
Unamortized Debt Discount and Debt Issuance Cost														(114,898,000)					(138,786,000)
Carrying Value, Long Term														$ 885,102,000					$ 861,214,000
Interest rate stated percentage (as a percent)				0.35%									0.35%	0.35%				0.35%	0.35%
Debt Instrument, Face Amount				$ 1,000,000,000
Unamortized Debt Discount				$ 20,000,000
Payments of debt issuance costs										$ 1,000,000
Debt Instrument, Convertible, Conversion Price | $ / shares				$ 1,315.10
Ratio of closing share price to conversion price as a condition for conversion of convertible 2015 Senior Notes, minimum (as a percent)				150.00%
Debt Instrument, Interest Rate, Effective Percentage				3.13%
Debt discount related to convertible notes, net of tax																					$ 92,400,000
Debt discount related to convertible notes, before tax																					154,300,000
Finance costs related to convertible notes, net of tax																					$ 100,000
Amortization of debt discount								$ 2,700,000	$ 2,600,000	1,500,000
0.9% Senior Convertible Notes Due September 2021
Debt Instrument
Outstanding Principal Amount														$ 1,000,000,000					$ 1,000,000,000
Unamortized Debt Discount and Debt Issuance Cost														(125,258,000)					(145,311,000)
Carrying Value, Long Term														$ 874,742,000					$ 854,689,000
Interest rate stated percentage (as a percent)			0.90%										0.90%	0.90%				0.90%	0.90%
Debt Instrument, Face Amount			$ 1,000,000,000
Payments of debt issuance costs									11,000,000
Debt Instrument, Convertible, Conversion Price | $ / shares			$ 2,055.50
Ratio of closing share price to conversion price as a condition for conversion of convertible 2015 Senior Notes, minimum (as a percent)			150.00%
Debt Instrument, Interest Rate, Effective Percentage			3.18%
Debt discount related to convertible notes, net of tax																			$ 82,500,000
Debt discount related to convertible notes, before tax																			142,900,000
Finance costs related to convertible notes, net of tax																			1,600,000
2.375% Senior Notes Due September 2024
Debt Instrument
Outstanding Principal Amount														$ 1,086,957,000					1,210,068,000
Unamortized Debt Discount and Debt Issuance Cost														(14,688,000)					(17,393,000)
Carrying Value, Long Term														$ 1,072,269,000					$ 1,192,675,000
Interest rate stated percentage (as a percent)													2.375%	2.375%				2.375%	2.375%	2.375%
Debt Instrument, Face Amount | €													€ 1,000,000,000					€ 1,000,000,000		€ 1,000,000,000
Unamortized Debt Discount | €																				€ 9,400,000
Payments of debt issuance costs									6,500,000
Debt Instrument, Interest Rate, Effective Percentage																				2.48%
3.65% Senior Notes Due March 2025 [Member]
Debt Instrument
Outstanding Principal Amount														$ 500,000,000
Unamortized Debt Discount and Debt Issuance Cost														(4,160,000)
Carrying Value, Long Term														$ 495,840,000
Interest rate stated percentage (as a percent)													3.65%	3.65%		3.65%
Debt Instrument, Face Amount																$ 500,000,000
Unamortized Debt Discount																$ 1,300,000.0
Payments of debt issuance costs								3,200,000
Debt Instrument, Interest Rate, Effective Percentage																3.68%
1.8% Senior Notes Due March 2027 [Member]
Debt Instrument
Outstanding Principal Amount														$ 1,086,957,000
Unamortized Debt Discount and Debt Issuance Cost														(6,200,000)
Carrying Value, Long Term														$ 1,080,757,000
Interest rate stated percentage (as a percent)													1.80%	1.80%			1.80%
Debt Instrument, Face Amount | €													€ 1,000,000,000				€ 1,000,000,000
Unamortized Debt Discount | €																	€ 300,000.0
Payments of debt issuance costs								6,300,000
Debt Instrument, Interest Rate, Effective Percentage																	1.80%
2.15% Senior Notes Due November 2022 [Member]
Debt Instrument
Outstanding Principal Amount														$ 815,217,000
Unamortized Debt Discount and Debt Issuance Cost														(6,555,000)
Carrying Value, Long Term														$ 808,662,000
Interest rate stated percentage (as a percent)													2.15%	2.15%	2.15%
Debt Instrument, Face Amount | €													€ 750,000,000		€ 750,000,000
Unamortized Debt Discount | €															€ 2,212,500.000000
Payments of debt issuance costs								3,700,000
Debt Instrument, Interest Rate, Effective Percentage																2.20%
Minimum | 1.00% Convertible Senior Notes Due March 2018
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days					20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares					$ 0
Minimum | 0.35% Senior Convertible Notes Due June 2020
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days				20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares				$ 0
Minimum | 0.9% Senior Convertible Notes Due September 2021
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days			20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 0
Maximum | 1.00% Convertible Senior Notes Due March 2018
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days					30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares					$ 344,000,000
Maximum | 0.35% Senior Convertible Notes Due June 2020
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days				30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares				$ 397,000,000
Maximum | 0.9% Senior Convertible Notes Due September 2021
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days			30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 375,000,000
Revolving Credit Facility
Debt Instrument
Revolving credit facility	$ 2,000,000,000	$ 1,000,000,000
Carrying Value, Long Term														$ 0					$ 0
Payments of debt issuance costs								$ 4,000,000.0
Unamortized debt issuance costs written off to interest expense related to debt conversions						$ 1,000,000
Revolving Credit Facility | Minimum
Debt Instrument
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.085%
Revolving Credit Facility | Maximum
Debt Instrument
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Revolving Credit Facility | Rate 2C | Minimum
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	0.00%
Revolving Credit Facility | Rate 2C | Maximum
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	0.50%
Letter of Credit
Debt Instrument
Revolving credit facility	$ 70,000,000
Swingline Loans
Debt Instrument
Revolving credit facility	$ 50,000,000.0
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Rate 1 | Minimum
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	0.875%
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Rate 1 | Maximum
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	1.50%
Federal Funds Purchased | Revolving Credit Facility | Rate 2B
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	0.50%
One Month LIBOR | Revolving Credit Facility | Rate 2C
Debt Instrument
Debt Instrument, Basis Spread on Variable Rate	1.00%
Convertible Debt Converted Debt [Member]
Debt Instrument
Unamortized debt issuance costs written off to interest expense related to debt conversions									$ 500,000	$ 2,400,000