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Commitments And Contingencies (Purchase Commitment Narrative) (Details) (Details) (Inventory Purchase Commitment, USD $)
In Millions, unless otherwise specified
Jan. 25, 2014
Inventory Purchase Commitment
 
Purchase Commitment, Excluding Long-term Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed $ 176.6
Purchase Commitment, Recognized Loss $ 3.5