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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2009
Number of manufacturing plants around world 39    
Number of joint ventures 3    
Foreign currency translation adjustment $ 4.5 $ 4.6 $ 0.2
Number of days considered to review for collectability   90  
Inventories valuation, LIFO method to total inventory, in percentage 33.00% 31.00%  
Excess of FIFO inventory cost over LIFO inventory carrying values 37.1 32.7  
Obsolete inventory reserves 14.5 14.9  
Depreciation expense 54.5 53.2 52.9
Capitalization of direct cost, amortization period in years   5  
Other intangible assets, minimum estimated useful life, years 3    
Other intangible assets, maximum estimated useful life, years 20    
Options excluded from the diluted net earnings per share calculation 494,349 845,827 1,158,451
Shipping and handling costs $ 61.9 $ 49.8 $ 50.4
Building And Building Improvements [Member]
     
Estimated useful life, minimum, years 10    
Estimated useful life, maximum, years 40    
Machinery And Equipment [Member]
     
Estimated useful life, minimum, years 3    
Estimated useful life, maximum, years 10