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Segment Information - Reconciliation of Earnings (Loss) from Operations to Earnings Before Income Tax and Earnings from Unconsolidated Affiliates (Detail) - USD ($) $ in Millions | 3 Months Ended
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Nov. 30, 2023 | Nov. 30, 2022
Segment Reporting [Abstract] |  |
Earnings (loss) from operations | $ 64.9 | $ (4.8)
Interest and foreign exchange | 23.2 | 19.6
Earnings (loss) before income tax and earnings from unconsolidated affiliates | $ 41.7 | $ (24.4)

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