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		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets			$ 4.7	$ 17.5
Total	$ 4.5	$ 17.2	4.7	17.5
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total			4.7	17.5
Machinery and Equipment | Discounted Cash Flows; Indicative Bids | Level 3 | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets			$ 4.7	$ 17.5