Goodwill and Other Intangible Assets (Reconciliation Of Goodwill) (Details) $ in Millions	6 Months Ended
	Jan. 31, 2017 USD ($)
Goodwill [Roll Forward]
Balance as of July 31, 2016	$ 229.3
Goodwill acquired	1.1
Foreign exchange translation	(1.7)
Balance as of January 31, 2017	228.7
Operating Segments | Engine Products
Goodwill [Roll Forward]
Balance as of July 31, 2016	77.3
Goodwill acquired	1.1
Foreign exchange translation	(0.2)
Balance as of January 31, 2017	78.2
Operating Segments | Industrial Products segment
Goodwill [Roll Forward]
Balance as of July 31, 2016	152.0
Goodwill acquired	0.0
Foreign exchange translation	(1.5)
Balance as of January 31, 2017	$ 150.5