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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 16, 2011	Apr. 23, 2011	Jul. 16, 2011
Income Taxes
Effective tax rate	35.50%	35.00%	35.20%
Uncertain tax positions, increase	$ 4.9		$ 4.9

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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