DEBT (Details 4) (USD $)	12 Months Ended						1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended					12 Months Ended	1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Convertible Notes	Dec. 31, 2012 Convertible Notes	Dec. 31, 2011 Convertible Notes	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]	Jun. 30, 2013 0.35% Senior Convertible Notes Due June 2020 [Member]	Dec. 31, 2013 Convertible Debt Liability [Member]	Dec. 31, 2012 Convertible Debt Liability [Member]	Dec. 31, 2011 Convertible Debt Liability [Member]	Dec. 31, 2013 Convertible Debt Converted Debt [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]
Debt Instrument
Estimated market value of outstanding senior notes	$ 3,100,000,000	$ 2,300,000,000
Debt Instrument Conversion Terms
Aggregate principal amount							575,000,000				1,000,000,000			1,000,000,000
Interest expense related to convertible notes				78,200,000	59,400,000	30,600,000
Debt financing costs paid								13,300,000				20,900,000			1,000,000
Debt Instrument, Convertible, Conversion Price							$ 303.06				$ 944.61			$ 1,315.10
Gain (loss) on extinguishment of debt, pretax	(26,661,000)	0	(32,000)	(26,700,000)
Gain (loss) on extinguishment of debt, net of tax				(16,200,000)
Interest rate on Convertible Senior Notes (as a percent)							1.25%				1.00%			0.35%
Debt Instrument, Unamortized 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
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 (as a percent)							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
Effective interest rate at debt origination or modification (as a percent)							5.89%				3.50%			3.13%			4.50%	4.80%	6.30%
Debt discount related to convertible notes, net of tax							69,100,000				80,900,000					92,400,000
Debt discount related to convertible notes, before tax							115,200,000				135,200,000					154,300,000
Finance costs related to convertible notes, net of tax							1,600,000				2,800,000					100,000
Contractual coupon interest related to convertible notes included in interest expense				17,700,000	15,200,000	7,200,000
Amortization of debt discount included in interest expense	55,718,000	39,820,000	21,414,000	55,700,000	39,800,000	21,400,000									1,500,000
Amortization of debt issuance costs included in interest expense				4,800,000	4,400,000	2,000,000
Write off of Deferred Debt Issuance Cost																				$ 2,400,000