DEBT Narrative (Details) $ in Millions	3 Months Ended
	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,900
Minimum Net Worth Required for Compliance	9,000
Debt and capital lease obligations	5,800
Debt fair value	5,500
Proceeds from issuance of debt		$ 600	$ 210
Repayments of Commercial Paper		410
Commercial Paper	$ 80
Minimum [Member]
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital	0.60
Commercial Paper
Debt Instrument [Line Items]
Revolving credit facilities available	$ 1,000
Revolving Credit Facility [Member] | Committed Facility
Debt Instrument [Line Items]
Revolving credit facilities available	1,400	1,500
Receivables Securitization Program [Member] | Uncommitted Facility
Debt Instrument [Line Items]
Revolving credit facilities available	500
Fourth Point Zero Due 2026
Debt Instrument [Line Items]
Proceeds from issuance of debt	24	$ 72
Fourth Point Zero Due 2026 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.00%
Environmental Debt Obligations
Debt Instrument [Line Items]
Repayments of Debt	49
Environmental Development Bond Due May 2028
Debt Instrument [Line Items]
Proceeds from issuance of debt	54
Repayments of Debt	54
Environmental Development Bond Due June 2030
Debt Instrument [Line Items]
Proceeds from issuance of debt	25
Repayments of Debt	$ 25