FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Schedule of Recurring Fair Value Measurements

The following table presents the fair value for those assets and (liabilities) measured on a recurring basis as of March 31, 2026 and September 30, 2025:

	March 31, 2026
	Assets								Liabilities
(in millions)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Interest rate derivatives	$	—	$	17.5	$	—	$	17.5	$	—	$	—	$	—	$	—
Foreign exchange hedges	—		0.8		—		0.8		—		(0.9)		—		(0.9)
Insurance annuity	—		—		20.0		20.0		—		—		—		—
Cross currency swap	—		5.9		—		5.9		—		(40.0)		—		(40.0)
	September 30, 2025
	Assets								Liabilities
(in millions)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Interest rate derivatives	$	—	$	22.1	$	—	$	22.1	$	—	$	—	$	—	$	—
Foreign exchange hedges	—		0.5		—		0.5		—		(0.6)		—		(0.6)
Insurance annuity	—		—		20.3		20.3		—		—		—		—
Cross currency swap	—		5.9		—		5.9		—		(51.0)		—		(51.0)

Schedule of Quantitative about Significant Unobservable Inputs Used to Determine Fair Value of Impairment of Long-Lived Assets Held and Used

The following table presents quantitative information about the significant unobservable inputs used to determine the fair value of the impairment of long-lived assets held and used and net assets held for sale for the six months ended March 31, 2026 and 2025:

	Quantitative Information about Level 3 Fair Value Measurements
(in millions)	Impairment Amount		Valuation Technique	Unobservable Input	Range of Input Values
March 31, 2026
Long Lived Assets	$	4.7	Discounted Cash Flows; Indicative Bids	Discounted Cash Flows; Indicative Bids	N/A
Total	$	4.7
March 31, 2025
Long Lived Assets	$	17.5	Discounted Cash Flows; Indicative Bids	Discounted Cash Flows; Indicative Bids	N/A
Total	$	17.5