INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2024	Mar. 31, 2024	Sep. 30, 2023
Income Taxes [Line Items]
U.S. Federal statutory income tax rate	21.00%	21.00%
SB/RH
Income Taxes [Line Items]
Income taxes payable	$ 88.7	$ 88.7
Income taxes receivable			$ 77.8

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant