FINANCIAL ASSETS AND LIABILITIES - Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Financial assets and financial liabilities:
Derivative assets impacted by netting arrangements	$ 0		$ 0		$ 0
Impairments of non-financial assets	0	$ 0	0	$ 0
Long-term debt	3,000		3,000		3,000
Long-term debt, fair value	2,300		2,300		2,700
Proceeds from third parties	722		1,300
Financing receivables sold		$ 537		$ 1,300
Fees and net gains and losses	12		20
Time deposits
Financial assets and financial liabilities:
Impairments of non-financial assets			0		0
Level 2
Financial assets and financial liabilities:
Derivative assets	$ 50		$ 50		$ 9
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets, Current		Prepaid Expense and Other Assets, Current		Prepaid Expense and Other Assets, Current
Derivative liabilities	$ 16		$ 16		$ 2
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent, Accrued Liabilities and Other Liabilities, Current		Other Liabilities, Noncurrent, Accrued Liabilities and Other Liabilities, Current		Other Liabilities, Noncurrent, Accrued Liabilities and Other Liabilities, Current
Cash and cash equivalents | Time deposits
Financial assets and financial liabilities:
Available-for-sale debt securities	$ 623		$ 623		$ 972