Goodwill and Other Intangible Assets (Reconciliation of Intangible Assets) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2019 USD ($)
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, net intangible assets, ending balance	$ 150.3
Accumulated amortization, net intangible assets, ending balance	(75.4)
Net intangible assets, ending balance	74.9
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, net intangible assets, beginning balance	63.0
Accumulated amortization, net intangible assets, beginning balance	(35.7)
Net intangible assets, beginning balance	27.3
Intangibles acquired	38.9
Amortization expense	(4.2)
Foreign currency translation gain (loss), gross carrying amount	(0.9)
Foreign currency translation gain (loss), accumulated amortization	0.2
Foreign exchange translation, net intangible assets	(0.7)
Gross carrying amount, net intangible assets, ending balance	101.0
Accumulated amortization, net intangible assets, ending balance	(39.7)
Net intangible assets, ending balance	61.3
Patents, trademarks and technology
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, net intangible assets, beginning balance	43.7
Accumulated amortization, net intangible assets, beginning balance	(35.4)
Net intangible assets, beginning balance	8.3
Intangibles acquired	6.8
Amortization expense	(1.4)
Foreign currency translation gain (loss), gross carrying amount	(1.2)
Foreign currency translation gain (loss), accumulated amortization	1.1
Foreign exchange translation, net intangible assets	(0.1)
Gross carrying amount, net intangible assets, ending balance	49.3
Accumulated amortization, net intangible assets, ending balance	(35.7)
Net intangible assets, ending balance	$ 13.6