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Other Required Disclosures - Components of Properties (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 30, 2012
Sep. 30, 2012
Property, Plant and Equipment [Line Items]    
Total properties, at cost $ 556.2 $ 437.7
Less accumulated depreciation 228.2 216.1
Properties, net 328.0 221.6
Land, buildings and improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Total properties, at cost 94.9 93.6
Machinery, equipment and other [Member]
   
Property, Plant and Equipment [Line Items]    
Total properties, at cost 441.5 325.7
Construction in progress [Member]
   
Property, Plant and Equipment [Line Items]    
Total properties, at cost $ 19.8 $ 18.4