INCOME TAXES - Narrative (Details) $ in Millions	1 Months Ended	12 Months Ended			15 Months Ended
	Dec. 31, 2021 USD ($)	Sep. 30, 2024 USD ($) divestiture	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2020 USD ($)
Income Tax Contingency [Line Items]
Number of small divestitures | divestiture		2
Increase in unrecognized tax benefits			0.02
Payroll taxes deferred					$ 73
Payroll taxes paid	$ 37
Tax holiday expiration, percent		65.00%
Tax holiday expiration, term of expiration		3 years
Unrecognized tax benefits that would impact effective tax rate		$ 246
Unrecognized tax benefits, income tax penalties and interest expense (income)		6	$ 1	$ (7)
Unrecognized tax benefits, income tax penalties and interest accrued		27	22
Income taxes paid		950	$ 3,310	$ 720
Net operating losses and tax credits, amount available to carry forward		$ 283
Net operating losses and tax credits, additional amount available to carry forward, term		5 years
Percentage of net operating losses and tax credits that can be carried forward		66.67%
Copeland
Income Tax Contingency [Line Items]
Income taxes paid		$ 2,300