Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Jul. 31, 2017 USD ($) joint_venture plant	Jul. 31, 2016 USD ($)	Jul. 31, 2015 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Number of manufacturing plants around world | plant	44
Number of joint ventures | joint_venture	3
Foreign currency transaction gains (losses)	$ (4,000,000)	$ (4,700,000)	$ 2,100,000
Number of days considered to review for collectability	90 days
Percentage of LIFO inventory	27.20%	29.00%
Excess of FIFO over LIFO inventory	$ 37,100,000	$ 39,800,000
Depreciation	68,800,000	68,800,000	66,900,000
Asset impairment charges	0	0	0
Shipping and handling costs	61,400,000	56,300,000	63,200,000
Debt issuance costs, net	$ 2,200,000	1,600,000
Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Capitalization of direct cost, amortization period in years	5 years
Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Capitalization of direct cost, amortization period in years	7 years
Machinery and equipment | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	3 years
Machinery and equipment | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	10 years
Building and Building Improvements | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	10 years
Building and Building Improvements | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	40 years
Other Intangible Assets | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	3 years
Other Intangible Assets | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Finite-lived intangible assets, useful life	20 years
Partially Completed Facility In Xuzhou China
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Asset impairment charges	$ 0	2,900,000	$ 0
Other Noncurrent Assets | Accounting Standards Update 2015-03
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Debt issuance costs, net		(1,600,000)
Long-term Debt | Accounting Standards Update 2015-03
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Debt issuance costs, net		$ 1,600,000