Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details) (Narrative)

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Financial Instruments (Details) (Narrative) (USD $)
In Millions, unless otherwise specified
Mar. 29, 2014
Dec. 28, 2013
Financial Instruments [Line Items]    
Noncurrent marketable securities, at fair value $ 80 $ 90
Money Market Funds
   
Financial Instruments [Line Items]    
Available-for-sale investments used as collateral 18 18
Noncurrent marketable securities, at fair value 4 2
Corporate Bonds
   
Financial Instruments [Line Items]    
Noncurrent marketable securities, at fair value 76 88
Mutual Funds
   
Financial Instruments [Line Items]    
Restricted investments $ 13 $ 14