CHARGES ASSOCIATED WITH RESTRUCTURING AND OTHER ACTIVITIES - Accrued Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024
Restructuring Reserve [Roll Forward]
Charges	$ 106	$ 2
Restructuring Program
Restructuring Reserve [Roll Forward]
Charges	106		$ 115
Restructuring Program | Restructuring Charges
Restructuring Reserve [Roll Forward]
Beginning balance	88
Charges	85		92
Cash payments	(8)
Non-cash asset write-offs	(2)
Translation and other adjustments	(2)
Ending balance	161		88
Employee- Related Costs | Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning balance	88
Charges	82		90
Cash payments	(7)
Non-cash asset write-offs	0
Translation and other adjustments	(2)
Ending balance	161		88
Asset- Related Costs | Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charges	2		2
Cash payments	0
Non-cash asset write-offs	(2)
Translation and other adjustments	0
Ending balance	0		0
Contract Terminations | Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charges	0		0
Cash payments	0
Non-cash asset write-offs	0
Translation and other adjustments	0
Ending balance	0		0
Other Exit Costs | Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charges	1		0
Cash payments	(1)
Non-cash asset write-offs	0
Translation and other adjustments	0
Ending balance	$ 0		$ 0