Financing Arrangements (Details Textuals) (USD $)	6 Months Ended			3 Months Ended	6 Months Ended		1 Months Ended	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Dec. 30, 2012	Jun. 30, 2013 1% Sr. Convertible Notes due 2013 [Member]	Jun. 30, 2013 1% Sr. Convertible Notes due 2013 [Member]	Dec. 30, 2012 1% Sr. Convertible Notes due 2013 [Member]	Aug. 31, 2010 1.5% Sr. Convertible Notes due 2017 [Member]	Jun. 30, 2013 1.5% Sr. Convertible Notes due 2017 [Member]	Dec. 30, 2012 1.5% Sr. Convertible Notes due 2017 [Member]
Debt Instrument
Convertible debt, par value				$ 0	$ 0	$ 928,061,000	$ 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%
Convertible Senior Notes, issuance date							Aug. 20, 2010
Convertible Senior Notes, due date				May 15, 2013			Aug. 15, 2017
Convertible senior notes, interest rate							1.50%
Initial conversion rate, number of share converted							19.0931
Conversion of notes, base conversion price							1,000
Initial conversion price per share							$ 52.37
Net proceeds from the offering of the Notes due							981,000,000
Principal amount of the liability component							706,000,000
Effective interest rate on the liability component							6.85%
Carrying value of the equity component							294,000,000	294,000,000	294,000,000
Debt Instrument, Unamortized Bond Discount				0	0	21,353,000		190,374,000	210,087,000
Remaining amortization period of convertible debt								4 years 2 months
Unamortized Debt Issuance Expense	7,767,000		8,708,000
Debt Redemption
Extinguishment of Debt, Amount	(928,061,000)	0		928,100,000
Interest Payable				$ 4,600,000
Warrants
Number of shares initially agreed to be sold to counterparties							19,100,000
Exercise price of warrants				95.03	95.03		73.33
Number of shares counterparties can purchase from entity net of redemption					11,300,000
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
Convertible Bond Hedge
Number of shares initially agreed to be purchased from counterparties							19,100,000
Bond hedge options, exercise price							$ 52.37
Number of shares purchased under bond hedge								0