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Segment Reporting (Summary Of Segment Detail) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2016 | Apr. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 571.3 | $ 575.6 | $ 1,626.5 | $ 1,760.6
Earnings Before Income Taxes | 72.1 | 67.8 | 174.9 | 210.5
Operating Segments | Engine Product segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 357.3 | 368.0 | 1,024.8 | 1,115.8
Earnings Before Income Taxes | 48.7 | 47.7 | 112.1 | 142.3
Operating Segments | Industrial Product segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 214.0 | 207.6 | 601.7 | 644.8
Earnings Before Income Taxes | 29.9 | 25.3 | 81.6 | 88.0
Corporate, Non-Segment | Corporate and Unallocated |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Earnings Before Income Taxes | $ (6.5) | $ (5.2) | $ (18.8) | $ (19.8)

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