Fair Value Measurements (Derivatives on the Balance Sheet) (Details) - USD ($) $ in Millions	Jan. 31, 2020	Jul. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amounts	$ 69.8	$ 84.0
Forward foreign currency exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amounts	14.0	28.2
Net investment hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amounts	55.8	55.8
Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	3.8	2.7
Derivative liabilities	0.7	3.7
Fair Value, Inputs, Level 2 \| Forward foreign currency exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2.7	1.6
Derivative liabilities	0.7	1.8
Fair Value, Inputs, Level 2 \| Net investment hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1.1	1.1
Derivative liabilities	$ 0.0	$ 1.9

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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Fair value, before effects of master netting arrangements, of a financial liability or 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 liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Nominal or face amount used to calculate payment on derivative.

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