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Financing Arrangements (Details Textuals) (USD $)
1 Months Ended3 Months Ended9 Months Ended1 Months Ended3 Months Ended9 Months Ended
May 31, 2006
1% Sr. Convertible Notes due 2013 [Member]
Oct. 02, 2011
1% Sr. Convertible Notes due 2013 [Member]
year
Oct. 02, 2011
1% Sr. Convertible Notes due 2013 [Member]
amount
year
Jan. 02, 2011
1% Sr. Convertible Notes due 2013 [Member]
Aug. 31, 2010
1.5% Sr. Convertible Notes due 2017 [Member]
Oct. 02, 2011
1.5% Sr. Convertible Notes due 2017 [Member]
year
Oct. 02, 2011
1.5% Sr. Convertible Notes due 2017 [Member]
amount
year
Jan. 02, 2011
1.5% Sr. Convertible Notes due 2017 [Member]
Debt Instrument [Line Items]        
1% and 1.5% Notes due 2013 and 2017$ 1,150,000,000$ 1,150,000,000$ 1,150,000,000$ 1,150,000,000$ 1,000,000,000$ 1,000,000,000$ 1,000,000,000$ 1,000,000,000
Convertible Senior Notes, issuance dateMay 2006   August 2010   
Convertible Senior Notes, due dateMay 15, 2013Aug. 15, 2017
Convertible senior notes, interest rate1.00%   1.50%   
Initial conversion rate, number of share converted12.1426   19.0931   
Conversion of notes, base conversion price1,000   1,000   
Initial conversion price per share$ 82.36   $ 52.37   
Net proceeds from the offering of the Notes due1,130,000,000   981,000,000   
Debt Instrument Face Amount After Redemption 928,100,000928,100,000     
Principal amount of the liability component753,500,000   706,000,000   
Effective interest rate on the liability component7.40%7.40%7.40% 6.85%6.85%6.85% 
Carrying value of the equity component 394,300,000394,300,000396,500,000 294,000,000294,000,000 
Extinguishment of Debt, Amount 221,900,000      
Total consideration related to principal amount of debt redeemed 211,119,000      
Net Proceeds From Warrants And Bond Hedge Due To Redemption  300,000     
Debt Instrument, Unamortized Discount $ 88,837,000$ 88,837,000$ 156,801,000 $ 256,066,000$ 256,066,000$ 282,167,000
Remaining amortization period of convertible debt, in years 1.61.6  5.95.9 
Exercise price of warrants$ 95.03   $ 73.33   
Expected life of warrants (years) 1.91.9  6.26.2 
Number of separate components of warrants  20   40 
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 shares initially agreed to be purchased from counterparties14,000,000   19,100,000   
Number of warrants exercised 00  00 
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 00  00