Financing Arrangements (Details Textuals) (USD $)	9 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Jan. 01, 2012	May 31, 2006 1% Sr. Convertible Notes due 2013 [Member]	Sep. 30, 2012 1% Sr. Convertible Notes due 2013 [Member]	Sep. 30, 2012 1% Sr. Convertible Notes due 2013 [Member]	Jan. 01, 2012 1% Sr. Convertible Notes due 2013 [Member]	Oct. 02, 2011 1% Sr. Convertible Notes due 2013 [Member]	Aug. 31, 2010 1.5% Sr. Convertible Notes due 2017 [Member]	Sep. 30, 2012 1.5% Sr. Convertible Notes due 2017 [Member]	Sep. 30, 2012 1.5% Sr. Convertible Notes due 2017 [Member]	Jan. 01, 2012 1.5% Sr. Convertible Notes due 2017 [Member]	Oct. 02, 2011 1.5% Sr. Convertible Notes due 2017 [Member]
Debt Instrument
Convertible debt, par value				$ 1,150,000,000	$ 928,061,000	$ 928,061,000	$ 928,061,000		$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000
Debt Instrument, Interest Rate, Effective Percentage					7.40%	7.40%		7.40%		6.85%	6.85%		6.85%
Convertible Senior Notes, issuance date				May 15, 2006					Aug. 20, 2010
Convertible Senior Notes, due date				May 15, 2013					Aug. 15, 2017
Convertible senior notes, interest rate				1.00%					1.50%
Initial conversion rate, number of share converted				12.1426					19.0931
Conversion of notes, base conversion price				1,000					1,000
Initial conversion price per share				$ 82.36					$ 52.37
Net proceeds from the offering of the Notes due				1,130,000,000					981,000,000
Principal amount of the liability component				753,500,000					706,000,000
Effective interest rate on the liability component				7.40%					6.85%
Carrying value of the equity component					394,300,000	394,300,000	394,300,000		294,000,000	294,000,000	294,000,000	294,000,000
Debt Instrument, Unamortized Discount					35,377,000	35,377,000	75,915,000			219,536,000	219,536,000	247,235,000
Remaining amortization period of convertible debt, in years						0 years 7 months					4 years 11 months
Unamortized Debt Issuance Expense	9,179,000		12,992,000
Bond Redemption
Extinguishment of Debt, Amount							221,900,000
Convertible Bond Hedge
Number of shares initially agreed to be purchased from counterparties				14,000,000					19,100,000
Bond hedge options, exercise price				$ 82.36					$ 52.37
Number of shares an entity can purchase from counterparties net of redemption					11,300,000
Transaction cost of convertible bond hedge accounted for equity transaction	0	(1,494,000)
Number of shares purchased under bond hedge					0	0				0	0
Warrants
Exercise price of warrants				95.03					73.33
Expected Life of Warrants						0 years 11 months					5 years 2 months
Expiry period of Warrants					20 different dates from August 23, 2013 through September 20, 2013					40 different dates from November 13, 2017 through January 10, 2018
Proceeds from Issuance of Warrants	$ 0
Number of warrants exercised					0	0				0	0