Significant Accounting Policies - Inventories (Details) - USD ($) $ in Millions	12 Months Ended
Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2024
Inventory, Net [Abstract]
Raw materials, supplies, and work in process	$ 253.8	$ 246.8
Finished goods	227.5	306.7
Inventories excluding reserves	481.3	553.5
Less: Reserves	(30.9)	(26.8)
Total inventories	450.4	526.7
Inventory reserves:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	26.8	25.6	$ 25.8
Additions to reserve	17.4	11.9	10.9
Disposals of reserved inventory	(13.1)	(10.4)	(11.0)
Foreign currency translation adjustments	(0.2)	(0.3)	(0.1)
Ending balance	$ 30.9	$ 26.8	$ 25.6

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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The aggregate carrying amount as of the balance sheet date of items held by the entity which are partially completed at the time of measurement and unprocessed items that will go through the production process and become part of the final product. Includes supplies used directly or indirectly in the manufacturing or production process. This element may be used when the reporting entity combines work in process and raw materials into an aggregate amount.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment.

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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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