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Segment Information - Reconciliation of Earnings from Operations to Earnings Before Income Tax and Earnings from Unconsolidated Affiliates (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Aug. 31, 2025 | Aug. 31, 2024 | Aug. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Earnings from operations | $ 360.1 | $ 324.5 | $ 176.4
Interest and foreign exchange | 75.7 | 100.8 | 85.4
Earnings before income tax and earnings from unconsolidated affiliates | 284.4 | 223.7 | 91.0
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Earnings from operations | 488.1 | 447.7 | 281.1
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Earnings from operations | 128.0 | 123.2 | 104.7
Manufacturing | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Earnings from operations | 327.5 | 308.7 | 177.8
Leasing & Fleet Management | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Earnings from operations | $ 160.6 | $ 139.0 | $ 103.3

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