DEBT (Details)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 1.25% Convertible Senior Notes Due March 2015 USD ($)	Dec. 31, 2013 1.25% Convertible Senior Notes Due March 2015 USD ($)	Mar. 31, 2010 1.25% Convertible Senior Notes Due March 2015 USD ($)	Dec. 31, 2014 1.00% Convertible Senior Notes Due March 2018 USD ($)	Dec. 31, 2013 1.00% Convertible Senior Notes Due March 2018 USD ($)	Mar. 31, 2012 1.00% Convertible Senior Notes Due March 2018 USD ($)	Dec. 31, 2014 0.35% Senior Convertible Notes Due June 2020 USD ($)	Dec. 31, 2013 0.35% Senior Convertible Notes Due June 2020 USD ($)	May 31, 2013 0.35% Senior Convertible Notes Due June 2020 USD ($)	Dec. 31, 2014 0.9% Senior Convertible Notes Due September 2021 USD ($)	Aug. 31, 2014 0.9% Senior Convertible Notes Due September 2021 USD ($)	Dec. 31, 2014 2.375% Senior Notes Due September 2024 USD ($)	Dec. 31, 2014 2.375% Senior Notes Due September 2024 EUR (€)	Sep. 30, 2014 2.375% Senior Notes Due September 2024 EUR (€)
Debt Instrument
Interest rate stated percentage (as a percent)			1.25%	1.25%	1.25%	1.00%	1.00%	1.00%	0.35%	0.35%	0.35%	0.90%	0.90%	2.375%	2.375%	2.375%
Debt Instrument, Face Amount					$ 575,000,000			$ 1,000,000,000			$ 1,000,000,000		$ 1,000,000,000		€ 1,000,000,000	€ 1,000,000,000
Outstanding Principal Amount	4,210,068,000	2,000,000,000	37,524,000	160,464,000		1,000,000,000	1,000,000,000		1,000,000,000	1,000,000,000		1,000,000,000		1,210,068,000
Unamortized Debt Discount	(360,312,000)	(257,953,000)	(329,000)	(8,533,000)		(74,834,000)	(96,797,000)		(138,114,000)	(161,156,000)	(20,000,000)	(136,299,000)		(11,065,000)		(9,400,000)
Carrying Value, Short Term			37,195,000	151,931,000
Carrying Value, Long Term	$ 3,849,756,000	$ 1,742,047,000				$ 925,166,000	$ 903,203,000		$ 861,886,000	$ 838,844,000		$ 863,701,000		$ 1,199,003,000