Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Inventory Disclosure [Abstract]
Manufacturing supplies and raw materials	$ 352,747	$ 263,080
Work-in-process	167,336	116,909
Finished goods	73,387	173,761
Excess and obsolete adjustment	(19,876)	(24,221)
Inventories	$ 573,594	$ 529,529

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

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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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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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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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

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