Goodwill and Other Intangible Assets (Reconciliation Of Goodwill) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2016 USD ($)
Goodwill [Roll Forward]
Balance as of July 31, 2015	$ 223.7
Goodwill acquired	6.0
Foreign exchange translation	1.2
Balance as of April 30, 2016	230.9
Operating Segments | Engine Products
Goodwill [Roll Forward]
Balance as of July 31, 2015	71.0
Goodwill acquired	6.3
Foreign exchange translation	0.2
Balance as of April 30, 2016	77.5
Operating Segments | Industrial Product segment
Goodwill [Roll Forward]
Balance as of July 31, 2015	152.7
Goodwill acquired	(0.3)
Foreign exchange translation	1.0
Balance as of April 30, 2016	$ 153.4