Guarantees, commitments and contingencies (Tables)

9 Months Ended

Apr. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Product Warranty Liability

The following table presents our product warranty liability as of April 30, 2018:

	As of
	April 30,
(in millions)	2018
Beginning balance	$	5.3
Provision		3.9
Warranty activity during the period		(4.1	)
Ending balance	$	5.1