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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	4 Months Ended
	Jan. 20, 2013	Jan. 22, 2012
Income Tax Expense (Benefit) [Abstract]
Effective tax rates	30.20%	34.30%
Income Tax Credits and Adjustments	$ 1.3
Gross unrecognized tax benefits associated with uncertain income tax positions	0.6
Unrecognized Tax Benefits	$ 0.3

- 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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