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INVENTORIES - Schedule of Inventories (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Inventory Disclosure [Abstract]
Raw materials and purchased component parts	$ 1,522	$ 1,314
Work-in-progress	555	508
Finished goods	288	290
Total	2,365	2,112
Reserves for excess and obsolete inventory	(270)	(236)
Inventories—Net	$ 2,095	$ 1,876

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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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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 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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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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