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Supplemental Balance Sheet Information (Inventory) (Details) - USD ($)
$ in Millions
Jan. 31, 2018
Jul. 31, 2017
Assets [Abstract]    
Raw materials $ 111.3 $ 96.3
Work in process 26.0 19.7
Finished products 207.6 177.5
Inventories, net $ 344.9 $ 293.5