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VALUATION AND QUALIFYING ACCOUNTS (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Allowance for Doubtful Accounts |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at Beginning of Period | $ 32 | $ 31 | $ 35
Charged to Costs and Expenses | 4 | 3 | 4
Acquisitions & Purchase Price Adjustments | 0 | 0 | 0
Deductions from Reserve | (11) | (2) | (8)
Balance at End of Period | 25 | 32 | 31
Reserve for excess and obsolete inventory |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at Beginning of Period | 236 | 209 | 196
Charged to Costs and Expenses | 51 | 35 | 20
Acquisitions & Purchase Price Adjustments | 2 | 11 | 0
Deductions from Reserve | (19) | (19) | (7)
Balance at End of Period | 270 | 236 | 209
Valuation Allowance of Deferred Tax Assets |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at Beginning of Period | 318 | 227 | 137
Charged to Costs and Expenses | 138 | 91 | 90
Acquisitions & Purchase Price Adjustments | 0 | 0 | 0
Deductions from Reserve | 0 | 0 | 0
Balance at End of Period | $ 456 | $ 318 | $ 227

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