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Derivative Instruments - Effects of Cash Flow Hedges Included in Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Derivative [Line Items]
Revenue	$ 1,038.1	$ 793.5	$ 2,926.6	$ 2,027.0
Cost of revenue	910.0	717.2	2,612.2	1,848.3
Interest and foreign exchange	22.8	14.9	64.0	39.3
Sales
Derivative [Line Items]
Amount of gain (loss) on cash flow hedge activity		(0.6)	(0.9)	(1.0)
Cost of Sales
Derivative [Line Items]
Amount of gain (loss) on cash flow hedge activity	0.5	0.1	1.1	0.1
Interest and Foreign Exchange
Derivative [Line Items]
Amount of gain (loss) on cash flow hedge activity	$ 3.4	$ 1.7	$ 6.8	$ (4.3)

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