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Basis Of Presentation (Details) (USD $) In Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 27, 2011 | Jun. 26, 2011
Basis Of Presentation [Abstract] |  |
Environmental costs related to discontinued operations erroneously reported in continuing operations, after tax | $ 0.5 | $ 0.5

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