Summary of business operations and significant accounting policies (Tables)

12 Months Ended

Jul. 31, 2014

Property, Plant, and Equipment

Property, plant, and equipment consisted of the following:

	Estimated Useful  Lives (Years)	July 31,
		2014			2013
(in millions)
Property, plant, and equipment:
Land and land improvements	N/A	$	7.5		$	7.4
Building and improvements	35 to 40		85.1			83.0
Leasehold improvements	lesser of useful life or the lease term		9.8			10.7
Equipment and software	3 to 7		129.2			118.9
Furniture and fixtures	3 to 7		7.3			9.4
			238.9			229.4
Less accumulated depreciation and amortization			(124.7	)		(118.4	)
Total property, plant and equipment		$	114.2		$	111.0