Segment Reporting (Summary of Segment Detail) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Segment Reporting Information
Net sales	$ 3,306.6	$ 2,853.9	$ 2,581.8
Equity earnings in unconsolidated affiliates	1.7	4.2	5.2
Earnings (loss) before income taxes	438.4	381.0	335.2
Equity investments in unconsolidated affiliates	22.4	24.2	21.7
Operating Segments | Engine Products Segment
Segment Reporting Information
Net sales	2,302.7	1,957.7	1,727.5
Equity earnings in unconsolidated affiliates	1.7	4.2	4.7
Earnings (loss) before income taxes	329.2	289.0	229.3
Equity investments in unconsolidated affiliates	22.4	24.2	21.7
Operating Segments | Industrial Products Segment
Segment Reporting Information
Net sales	1,003.9	896.2	854.3
Equity earnings in unconsolidated affiliates	0.0	0.0	0.5
Earnings (loss) before income taxes	162.5	133.3	124.9
Equity investments in unconsolidated affiliates	0.0	0.0	0.0
Corporate and Unallocated
Segment Reporting Information
Net sales	0.0	0.0	0.0
Equity earnings in unconsolidated affiliates	0.0	0.0	0.0
Earnings (loss) before income taxes	(53.3)	(41.3)	(19.0)
Equity investments in unconsolidated affiliates	$ 0.0	$ 0.0	$ 0.0