Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended
	Jan. 27, 2012	Jul. 31, 2014 item	Jul. 31, 2013	Jul. 31, 2012
Significant Accounting Policies [Line Items]
Number of manufacturing plants around world		39
Number of joint ventures		3
Foreign currency translation gains		$ 1,700,000	$ 200,000	$ 1,800,000
Number of days considered to review for collectability		90 days
Inventories valuation, LIFO method to total inventory, in percentage		33.00%	33.00%
Excess of FIFO inventory cost over LIFO inventory carrying values		37,900,000	37,800,000
Depreciation expense		62,000,000	58,800,000	55,300,000
Impairment charges		0	0	0
Options excluded from the diluted net earnings per share calculation		884,138	22,619	1,063,135
Stock split	2
Stock dividend	100.00%
Shipping and handling costs		$ 64,200,000	$ 66,200,000	$ 67,000,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Capitalization of direct cost, amortization period in years		5 years
Minimum [Member] | Other Intangible Assets [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		3 years
Minimum [Member] | Building And Building Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		10 years
Minimum [Member] | Machinery And Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Capitalization of direct cost, amortization period in years		7 years
Maximum [Member] | Other Intangible Assets [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		20 years
Maximum [Member] | Building And Building Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		40 years
Maximum [Member] | Machinery And Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life, years		10 years