Restructuring Charges And Other Adjusting Items (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2015	Jul. 31, 2015
Restructuring Charges [Abstract]
Restructuring and related costs in closing/write-off of facilities		$ 13.0
Employee severance costs		$ 3.0
Expense related to lump sum settlement	$ 3.9