Annual report pursuant to Section 13 and 15(d)

Goodwill And Acquired Intangible Assets (Narrative) (Details)

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Goodwill And Acquired Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 25, 2010
Dec. 26, 2009
Goodwill And Acquired Intangible Assets [Abstract]      
Estimated future amortization expense related to intangible assets, 2012 $ 4    
Estimated future amortization expense related to intangible assets, 2013 4    
Goodwill 323 323 323
Accumulated amortization of acquired intangible assets $ 540