SECURITIES REPURCHASES AND SHARE ISSUANCE (Details) (USD $)	0 Months Ended	12 Months Ended			1 Months Ended			3 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended			0 Months Ended			12 Months Ended				0 Months Ended	12 Months Ended						0 Months Ended
	Jun. 24, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May 31, 2011 ValueAct Capital Master Fund, L.P. ( ValueAct )	Mar. 31, 2011 ValueAct Capital Master Fund, L.P. ( ValueAct )	Dec. 31, 2012 ValueAct Capital Master Fund, L.P. ( ValueAct )	Jun. 30, 2013 Director	Jun. 29, 2012 5.375% Convertible Notes due in August, 2014	Sep. 30, 2012 5.375% Convertible Notes due in August, 2014	Dec. 31, 2012 5.375% Convertible Notes due in August, 2014	Dec. 31, 2011 5.375% Convertible Notes due in August, 2014	Jun. 10, 2009 5.375% Convertible Notes due in August, 2014	Nov. 08, 2011 2010 Securities Repurchase Program	Aug. 29, 2011 2010 Securities Repurchase Program	Nov. 04, 2010 2010 Securities Repurchase Program	Dec. 31, 2011 2010 Securities Repurchase Program	Dec. 31, 2011 2010 Securities Repurchase Program ValueAct Capital Master Fund, L.P. ( ValueAct )	Dec. 31, 2011 2010 Securities Repurchase Program 5.375% Convertible Notes due in August, 2014	Dec. 31, 2011 2010 Securities Repurchase Program Senior Notes	Nov. 03, 2011 2011 Securities Repurchase Program	Dec. 31, 2013 2011 Securities Repurchase Program	Dec. 31, 2012 2011 Securities Repurchase Program	Dec. 31, 2011 2011 Securities Repurchase Program	Dec. 31, 2012 2011 Securities Repurchase Program 5.375% Convertible Notes due in August, 2014	Dec. 31, 2011 2011 Securities Repurchase Program 5.375% Convertible Notes due in August, 2014	Dec. 31, 2011 2011 Securities Repurchase Program Senior Notes	Nov. 19, 2012 2012 Securities Repurchase Program	Nov. 21, 2013 2013 Securities Repurchase Program	Nov. 21, 2013 2013 Securities Repurchase Program NYSE
Securities Repurchase Program
Aggregate maximum amount authorized under the Securities Repurchase Program															$ 1,800,000,000.0	$ 1,500,000,000.0					$ 1,500,000,000							$ 1,500,000,000	$ 1,500,000,000
Increased authorized amount under the Securities Repurchase Program															300,000,000.0
Shares authorized to be repurchased as a percentage of public float																													10.00%
Shares to be repurchased as a percentage of issued capital																														5.00%
Maximum shares authorized for repurchase under the Securities Repurchase Program																														16,648,739
Aggregate principal amount of notes repurchased																			203,800,000	10,000,000					1,100,000	1,200,000	89,900,000
Stated interest rate (as a percent)											5.375%		5.375%
Aggregate purchase price of convertible notes											4,000,000	623,300,000							619,400,000							3,900,000
Carrying amount of convertible notes											1,000,000	177,600,000
Estimated fair value of convertible notes											1,100,000	209,200,000
Loss on extinguishment of debt		65,014,000	20,080,000	36,844,000						2,300,000	100,000	31,600,000
Difference between the estimated fair value and the repurchase price of securities									43,800,000		2,900,000	414,100,000
Difference between the estimated fair value and the purchase price of securities charged to accumulated deficit									43,600,000		200,000	380,900,000
Difference between the estimated fair value and the purchase price of securities charged to additional paid-in capital									200,000		2,700,000	33,200,000
Accreted interest on repurchase of convertible debt											100,000	9,800,000
Repurchase of convertible notes included in Consolidated cash flows as an outflow from financing activities		0	3,975,000	613,471,000							3,900,000								613,500,000
Unamortized deferred financing costs												5,600,000
Common shares repurchased					4,498,180	7,366,419											1,800,000	13,664,599				507,957	5,257,454	1,534,857
Aggregate repurchase price of the entity's common shares repurchased		55,629,000	280,724,000	639,242,000	224,800,000	274,800,000		19,900,000									74,500,000	574,100,000				35,700,000	280,700,000	65,100,000
Excess of repurchase price over carrying value of securities repurchased, charged to accumulated deficit								15,600,000									374,400,000					25,800,000	178,400,000
Amount receivable in relation to withholding taxes on repurchase							21,800,000
Redemption of senior notes																				9,900,000							88,700,000
Convertible notes, senior notes and shares repurchased														1,500,000,000								35,700,000	284,700,000	157,700,000
Shares repurchased								217,294
Issuance of common stock (in shares)	27,058,824
Price per share	$ 85.00
Issuance of common stock	2,300,000,000	2,306,880,000
Issuance costs	$ 30,700,000