Financing Arrangements (Details Textuals) (USD $)			1 Months Ended	3 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended
	Apr. 01, 2012	Jan. 01, 2012	May 31, 2006 1% Sr. Convertible Notes due 2013 [Member]	Apr. 01, 2012 1% Sr. Convertible Notes due 2013 [Member] year	Apr. 03, 2011 1% Sr. Convertible Notes due 2013 [Member]	Jan. 01, 2012 1% Sr. Convertible Notes due 2013 [Member]	Aug. 31, 2010 1.5% Sr. Convertible Notes due 2017 [Member]	Apr. 01, 2012 1.5% Sr. Convertible Notes due 2017 [Member] year	Apr. 03, 2011 1.5% Sr. Convertible Notes due 2017 [Member]	Jan. 01, 2012 1.5% Sr. Convertible Notes due 2017 [Member]
Debt Instrument
Convertible long-term debt, par value			$ 1,150,000,000	$ 1,150,000,000		$ 1,150,000,000	$ 1,000,000,000	$ 1,000,000,000		$ 1,000,000,000
Convertible Senior Notes, issuance date			May 2006				August 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
Debt Instrument Face Amount After Redemption				928,100,000
Principal amount of the liability component			753,500,000				706,000,000
Effective interest rate on the liability component			7.40%	7.40%	7.40%		6.85%	6.85%	6.85%
Carrying value of the equity component			396,500,000	394,300,000		394,300,000	294,000,000	294,000,000		294,000,000
Debt Instrument, Unamortized Discount				62,649,000		75,915,000		238,178,000		247,235,000
Remaining amortization period of convertible debt, in years				1.1				5.4
Unamortized Debt Issuance Expense	12,066,000	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
Number of shares purchased under bond hedge				0				0
Warrants
Exercise price of warrants			$ 95.03				$ 73.33
Expected life of warrants (years)				1.4				5.7
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
Number of warrants exercised				0				0