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ACQUISITIONS - FPT Industries LLC (Details) - USD ($)		12 Months Ended
	Mar. 01, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired		$ 2,347,000,000	$ 762,000,000	$ 437,000,000
GOODWILL		$ 10,419,000,000	$ 8,988,000,000	$ 8,641,000,000
FPT Industries LLC
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired	$ 57,000,000
Amount of goodwill expected to be tax deductible	9,000,000
GOODWILL	$ 34,000,000
Goodwill and intangible assets, expected tax deductible amount, period of deduction	15 years
Business acquisition, intangible assets, expected tax deductible amount	$ 0
Other intangible assets	$ 19,000,000

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