Summary of business operations and significant accounting policies (Tables)

12 Months Ended

Jul. 31, 2016

Property, Plant, and Equipment

Property, plant, and equipment consisted of the following:

	Estimated Useful Lives (Years)		July 31,
			2016			2015
(in millions)
Property, plant, and equipment:
Land and improvements		15 years for land improvements		7.0			6.9
Building and improvements		10 to 35		85.0			83.0
Leasehold improvements		lesser of useful life or the lease term		10.1			10.0
Equipment and software		3 to 7		142.7			133.7
Furniture and fixtures		5		7.6			7.1
Demonstration Inventory		3		3.9			—
			$	256.3		$	240.7
Less accumulated depreciation and amortization				(148.5	)		(134.4	)
Total property, plant and equipment			$	107.8		$	106.3