Segment Reporting (Summary Of Segment Detail) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 712.8	$ 700.0	$ 2,117.9	$ 2,009.5
Earnings before income taxes	99.5	99.0	276.4	260.1
Engine Products segment
Segment Reporting Information [Line Items]
Net sales	489.4	472.3	1,439.3	1,356.8
Industrial Products segment
Segment Reporting Information [Line Items]
Net sales	223.4	227.7	678.6	652.7
Operating Segments | Engine Products segment
Segment Reporting Information [Line Items]
Earnings before income taxes	71.5	67.3	188.6	183.9
Operating Segments | Industrial Products segment
Segment Reporting Information [Line Items]
Earnings before income taxes	32.7	34.4	101.5	95.7
Corporate and Unallocated
Segment Reporting Information [Line Items]
Earnings before income taxes	$ (4.7)	$ (2.7)	$ (13.7)	$ (19.5)