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		6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Segment Reporting [Abstract]
Earnings from operations	$ 63.5	$ 67.4	$ 128.4	$ 62.6
Interest and foreign exchange	24.6	21.6	47.8	41.2
Earnings before income tax and earnings from unconsolidated affiliates	$ 38.9	$ 45.8	$ 80.6	$ 21.4