Derivatives and Hedging - Fair Value and Associated Notional Amounts (Details) - Cash Flow Hedging - USD ($)	Jan. 31, 2020	Jul. 31, 2019
Derivative [Line Items]
Notional	$ 789,424,000	$ 849,550,000
Fair Value in Other Current Liabilities	17,715,000	12,463,000
Foreign currency forward contracts
Derivative [Line Items]
Notional	32,824,000	0
Fair Value in Other Current Liabilities	1,421,000	0
Interest rate swap agreements
Derivative [Line Items]
Notional	756,600,000	849,550,000
Fair Value in Other Current Liabilities	$ 16,294,000	$ 12,463,000

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant