Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule Of Reconciliation Between Statutory Federal Income Taxes And Total Provision (Benefit) For Income Taxes) (Details)

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Income Taxes (Schedule Of Reconciliation Between Statutory Federal Income Taxes And Total Provision (Benefit) For Income Taxes) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 25, 2010
Dec. 26, 2009
Income Taxes [Abstract]      
Provision (benefit) for income taxes $ (4) $ 38 $ 112