Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Narrative) (Details)

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Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended
Jun. 26, 2010
Jul. 02, 2011
Jun. 26, 2010
Dec. 25, 2010
Jul. 02, 2011
Auction Rate Securities [Member]
Jul. 02, 2011
Auction Rate Securities [Member]
Jul. 02, 2011
Non-UBS Student Loan ARS [Member]
Available-for-sale securities pledged as collateral   $ 10   $ 29      
Auction market, par value         60 60  
Net carrying amount, current         52 52 5
Proceeds from sale of available-for-sale securities   13         6
Realized gain on available-for-sale securities $ 8 $ 2 $ 8   $ 1    
Available-for-sale marketable debt securities maturity, years   1       1  
Maturity of Auction Rate Securities, minimum           January 2030  
Maturity of Auction Rate Securities, maximum           December 2050