Summary Of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Jul. 31, 2016 USD ($) joint_venture plant	Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Number of manufacturing plants around world | plant	42
Number of joint ventures | joint_venture	3
Foreign Currency Transaction Gain (Loss), before Tax	$ (4,700,000)	$ 2,100,000	$ 1,700,000
Number of days considered to review for collectability	90 days
Percentage of LIFO Inventory	29.00%	34.20%
Excess of Replacement or Current Costs over Stated LIFO Value	$ 39,800,000	$ 41,600,000
Depreciation	68,800,000	66,900,000	62,000,000
Asset Impairment Charges	0	0	0
Shipping, Handling and Transportation Costs	$ 56,300,000	63,200,000	64,200,000
Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Investment Term	1 year
Capitalization of direct cost, amortization period in years	7 years
Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Investment Term	3 months
Capitalization of direct cost, amortization period in years	5 years
Machinery and equipment | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Machinery and equipment | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Building and Building Improvements | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	40 years
Building and Building Improvements | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Other Intangible Assets | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Other Intangible Assets | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Partially Completed Facility In Xuzhou China
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Asset Impairment Charges	$ 0	$ 2,900,000	$ 0