DEBT (Details 2) (USD $)	9 Months Ended			3 Months Ended		9 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended	12 Months Ended		1 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Convertible Notes [Member]	Sep. 30, 2012 Convertible Notes [Member]	Sep. 30, 2013 Convertible Notes [Member]	Sep. 30, 2012 Convertible Notes [Member]	Dec. 31, 2012 Convertible Notes [Member]	May 31, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member] Days	Sep. 30, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member]	Sep. 30, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member]	Mar. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member] Days	Sep. 30, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Sep. 30, 2013 1.00% Convertible Senior Notes Due March 2018 [Member]	Dec. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Mar. 31, 2010 1.25% Convertible Senior Notes due March 2015 [Member] Days	Sep. 30, 2013 1.25% Convertible Senior Notes due March 2015 [Member]	Dec. 31, 2012 1.25% Convertible Senior Notes due March 2015 [Member]	Dec. 31, 2010 1.25% Convertible Senior Notes due March 2015 [Member]	May 31, 2013 Minimum [Member] 0.35 % Senior Convertible Notes Due June 2020 [Member]	Mar. 31, 2012 Minimum [Member] 1.00% Convertible Senior Notes Due March 2018 [Member]	Mar. 31, 2010 Minimum [Member] 1.25% Convertible Senior Notes due March 2015 [Member]	May 31, 2013 Maximum [Member] 0.35 % Senior Convertible Notes Due June 2020 [Member]	Mar. 31, 2012 Maximum [Member] 1.00% Convertible Senior Notes Due March 2018 [Member]	Mar. 31, 2010 Maximum [Member] 1.25% Convertible Senior Notes due March 2015 [Member]	Oct. 25, 2013 Subsequent Event [Member] 1.25% Convertible Senior Notes due March 2015 [Member]
Debt Instrument
Adjustments to Additional Paid-in Capital, Equity Component of Convertible Debt, Subsequent Adjustments																	$ 36,700,000	$ 54,700,000
Extinguishment of Debt, Amount																										390,000,000
Debt Conversion Cash Delivered for Principal Due on Converted Debt																										390,000,000
Estimated market value of outstanding convertible debt				4,300,000,000		4,300,000,000		2,300,000,000
Description of Senior Notes
Aggregate principal amount									1,000,000,000	1,000,000,000	1,000,000,000	1,000,000,000	1,000,000,000			575,000,000
Interest rate on Convertible Senior Notes									0.35%	0.35%	0.35%	1.00%	1.00%			1.25%
Unamortized debt discount	305,703,000		172,659,000						20,000,000	166,805,000	166,805,000			102,168,000	118,004,000		36,730,000	54,655,000
Debt financing costs paid											900,000		20,900,000						13,300,000
Convertible debt conversion price (in dollars per share)									$ 1,315.10			$ 944.61				$ 303.06
Minimum 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			20				20
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			30				30
Ratio of closing share price to conversion price as a condition for conversion of convertible 2015 Senior Notes, minimum									150.00%			150.00%				150.00%
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares																				0	0	0	397,000,000	344,000,000	132,700,000
Effective interest rate at debt origination or modification										3.13%	3.13%		3.50%			5.89%
Debt discount related to convertible notes, net of tax										92,400,000	92,400,000		80,900,000			69,100,000
Debt discount related to convertible notes, before tax										154,300,000	154,300,000		135,200,000			115,200,000
Finance costs related to convertible notes, net of tax										100,000	100,000		2,800,000			1,600,000
Interest expense related to convertible notes				23,500,000	16,400,000	59,100,000	43,200,000
Contractual coupon interest related to convertible notes included in interest expense				5,200,000	4,300,000	14,100,000	11,200,000
Amortization of debt discount included in interest expense	41,225,000	28,831,000		17,000,000	10,900,000	41,200,000	28,800,000			600,000	800,000
Amortization of debt issuance costs				$ 1,300,000	$ 1,200,000	$ 3,800,000	$ 3,200,000
Effective interest rate during the period				4.10%	4.70%	4.40%	4.90%