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Revenues, Income Before Taxes, and Gain on Dispositions, net of tax in Discontinued Operations (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 15, 2012
Jun. 17, 2011
Jun. 15, 2012
Jun. 17, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenues $ 2 $ 14 $ 15 $ 26
Income (loss) before income taxes   (2) 2 (3)
Gain on dispositions     $ 48