Segment Reporting (Summary Of Segment Detail) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 703.7	$ 664.7	$ 1,405.1	$ 1,309.5
Earnings before income taxes	80.5	76.4	176.9	161.1
Engine Products segment
Segment Reporting Information [Line Items]
Net sales	469.0	442.4	949.9	884.5
Industrial Products segment
Segment Reporting Information [Line Items]
Net sales	234.7	222.3	455.2	425.0
Operating Segments | Engine Products segment
Segment Reporting Information [Line Items]
Earnings before income taxes	53.2	53.9	117.1	116.6
Operating Segments | Industrial Products segment
Segment Reporting Information [Line Items]
Earnings before income taxes	32.2	31.9	68.8	61.3
Corporate and Unallocated
Segment Reporting Information [Line Items]
Earnings before income taxes	$ (4.9)	$ (9.4)	$ (9.0)	$ (16.8)