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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
Aug. 31, 2011
Inventory Disclosure [Line Items]    
Raw materials $ 1,534,182 $ 1,493,904
Work in process 444,721 451,162
Finished goods 290,046 282,273
Inventories $ 2,268,949 $ 2,227,339