Fair Value Measurements (Fair Value of Outstanding Derivatives in Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Jul. 31, 2020	Jul. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Notional Amounts	$ 82.0	$ 84.0
Significant Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Assets	3.3	2.7
Liabilities	(1.4)	(3.7)
Significant Observable Inputs (Level 2) \| Prepaid expenses and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Assets	3.2	2.7
Significant Observable Inputs (Level 2) \| Other long-term assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Assets	0.1
Net investment hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Notional Amounts	55.8	55.8
Net investment hedge \| Significant Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Assets	1.2	1.1
Liabilities	0.0	(1.9)
Forward foreign currency exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Notional Amounts	26.2	28.2
Forward foreign currency exchange contracts \| Significant Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Assets	2.1	1.6
Liabilities	$ (1.4)	$ (1.8)

Fair value, before effects of master netting arrangements, of a 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. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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