Segment Reporting (Summary of Segment Detail) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Segment Reporting Information
Net sales	$ 853.2	$ 765.0	$ 2,416.6	$ 2,080.8
Earnings before income taxes	111.3	110.9	309.8	267.0
Corporate and unallocated
Segment Reporting Information
Earnings before income taxes	(16.7)	(11.1)	(31.3)	(30.0)
Engine Products Segment | Operating Segments
Segment Reporting Information
Net sales	601.0	531.0	1,682.3	1,429.6
Earnings before income taxes	89.2	84.4	226.5	206.1
Engine Products Segment | Operating Segments | Off-Road
Segment Reporting Information
Net sales	108.2	95.7	297.6	238.4
Engine Products Segment | Operating Segments | On-Road
Segment Reporting Information
Net sales	36.1	39.7	100.7	105.0
Engine Products Segment | Operating Segments | Aftermarket
Segment Reporting Information
Net sales	425.4	371.4	1,198.1	1,018.7
Engine Products Segment | Operating Segments | Aerospace and Defense
Segment Reporting Information
Net sales	31.3	24.2	85.9	67.5
Industrial Products Segment | Operating Segments
Segment Reporting Information
Net sales	252.2	234.0	734.3	651.2
Earnings before income taxes	38.8	37.6	114.6	90.9
Industrial Products Segment | Operating Segments | Industrial Filtration Solutions
Segment Reporting Information
Net sales	178.5	163.7	515.2	449.3
Industrial Products Segment | Operating Segments | Gas Turbine Systems
Segment Reporting Information
Net sales	30.5	25.5	76.7	71.9
Industrial Products Segment | Operating Segments | Special Applications
Segment Reporting Information
Net sales	$ 43.2	$ 44.8	$ 142.4	$ 130.0