DEBT (Details 2) (USD $)			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2010 1.25% Convertible Senior Notes Due March 2015 [Member] Days	Dec. 31, 2010 1.25% Convertible Senior Notes Due March 2015 [Member]	Dec. 31, 2013 1.25% Convertible Senior Notes Due March 2015 [Member]	Dec. 31, 2012 1.25% Convertible Senior Notes Due March 2015 [Member]	Mar. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member] Days	Dec. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Dec. 31, 2013 1.00% Convertible Senior Notes Due March 2018 [Member]	May 31, 2013 0.35% Senior Convertible Notes Due June 2020 [Member] Days	Dec. 31, 2013 0.35% Senior Convertible Notes Due June 2020 [Member]	Mar. 31, 2012 Minimum [Member] 1.00% Convertible Senior Notes Due March 2018 [Member]	May 31, 2013 Minimum [Member] 0.35% Senior Convertible Notes Due June 2020 [Member]	Mar. 31, 2012 Maximum [Member] 1.00% Convertible Senior Notes Due March 2018 [Member]	May 31, 2013 Maximum [Member] 0.35% Senior Convertible Notes Due June 2020 [Member]
Convertible Debt
Aggregate principal amount			$ 575,000,000				$ 1,000,000,000			$ 1,000,000,000
Payments of Debt Issuance Costs				13,300,000				20,900,000			1,000,000
Outstanding Principal Amount	2,160,464,000	1,574,999,000			160,464,000	574,999,000		1,000,000,000	1,000,000,000		1,000,000,000
Unamortized Debt Discount	(266,486,000)	(172,659,000)			(8,533,000)	(54,655,000)		(118,004,000)	(96,797,000)	(20,000,000)	(161,156,000)
Carrying value	1,893,978,000	1,402,340,000			151,931,000	520,344,000		881,996,000	903,203,000		838,844,000
Debt Instrument, Interest Rate, Stated Percentage			1.25%				1.00%			0.35%
Debt Instrument, Convertible, Conversion Price			$ 303.06				$ 944.61			$ 1,315.10
Debt Instrument Common Stock Closing Price to Conversion Price Ratio Terms Days Minimum			20				20			20
Debt Instrument Common Stock Closing Price to Conversion Price Ratio Terms Days Maximum			30				30			30
Percentage On Conversion Price Of Closing Price Of Common Stock Traded For At Least 20 Trading Days Out Of 30 Consecutive Trading Days In The Period On Last Trading Day Of Previous Quarter			150.00%				150.00%			150.00%
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares												$ 0	$ 0	$ 344,000,000	$ 397,000,000