FINANCIAL ASSETS AND LIABILITIES - Not Measured at Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Financial assets and financial liabilities:
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 Liability, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities and Other Liabilities, Current		Accrued Liabilities and Other Liabilities, Current		Accrued Liabilities and Other Liabilities, Current
Derivative assets impacted by netting arrangements	$ 0.0		$ 0.0		$ 0.0
Impairments of non-financial assets	0.0	$ 0.0	0.0	$ 0.0
Long-term debt	3,000.0		3,000.0		3,000.0
Long-term debt, fair value	2,500.0		2,500.0		2,500.0
Gross proceeds from third parties	913.0	722.0	2,100.0	1,300.0
Fees associated with the transfers of receivables	12.0	$ 12.0	28.0	$ 20.0
Time deposits
Financial assets and financial liabilities:
Impairments of non-financial assets			0.0		0.0
Cash and cash equivalents | Time deposits
Financial assets and financial liabilities:
Available-for-sale debt securities	$ 713.0		$ 713.0		$ 814.0