Inventories (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 2,070,569	$ 1,574,241
Work in process	788,742	822,628
Finished goods	659,335	591,227
Reserve for excess and obsolete inventory	(60,940)	(46,013)
Inventories, net	$ 3,457,706	$ 2,942,083

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

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