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Commitments and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified	Jul. 28, 2013
Commitments and Contingencies Disclosure [Abstract]
Range of possible loss, minimum	$ 2.5
Range of possible loss, maximum	5.7
Environmental loss contingency accrual, at carrying value	$ 2.5

Total costs accrued as of the balance sheet date for environmental loss contingencies.

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.