TAXES (Details) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares
Income Tax Disclosure [Abstract]
Income taxes	$ 199	$ 162	$ 382	$ 178
Effective income tax rate	32.00%	23.00%	27.00%	20.00%
Income tax benefit related to discrete tax items			$ (49)	$ 57
Income taxes benefit related to discrete tax items (in dollars per share) | $ / shares			$ 0.09	$ 0.10
Income tax (expense) benefit related to business combinations, as a percent			0.10	0.01
Income tax (expense) benefit related to discrete tax items, as a percent	(2.00%)
Income tax (expense) benefit related to discrete tax items, as a percent			5.00%