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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