Summary of business operations and significant accounting policies (Tables)

12 Months Ended

Jul. 31, 2015

Property, Plant, and Equipment

Property, plant, and equipment consisted of the following:

	Estimated Useful  Lives (Years)	July 31,
		2015			2014
(in millions)
Property, plant, and equipment:
Land and improvements	15 years for land improvements		6.9			7.5
Building and improvements	10 to 35		83.0			85.1
Leasehold improvements	lesser of useful life or the lease term		10.0			9.8
Equipment and software	3 to 7		133.7			129.2
Furniture and fixtures	5		7.1			7.3
			240.7			238.9
Less accumulated depreciation and amortization			(134.4	)		(124.7	)
Total property, plant and equipment		$	106.3		$	114.2