Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

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Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 25, 2011
Dec. 26, 2010
Marketable Securities [Abstract]    
Effective ownership interest in debt mutual fund (fair value option) 21.00%  
Changes in fair value of debt mutual fund (fair value option) $ 5 $ 5
Trading securities, unrealized holding loss $ 2