FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Significant Unobservable Inputs Used to Determine Fair Value Long-Lived Assets Held and Used (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets			$ 6.1	$ 20.0
Total	$ 1.4	$ 7.2	6.1	24.7
Machinery and Equipment | Discounted Cash Flows; Indicative Bids | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets			$ 6.1	20.0
Machinery and Equipment | Indicative Bids | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Assets Held for Sale				$ 4.7