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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
12 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Schedule of Carrying Values and Fair Values for Financial Instruments
The carrying values and estimated fair values for financial instruments as of September 30, 2023 and 2022 are as follows:
September 30, 2023September 30, 2022
(in millions)
Level 1
Level 2
Level 3
Fair Value
Carrying
Amount
Level 1
Level 2
Level 3
Fair Value
Carrying
Amount
Derivative Assets
$— $3.3 $— $3.3 $3.3 $— $22.2 $— $22.2 $22.2 
Derivative Liabilities
— 9.0 — 9.0 9.0 — 6.0 — 6.0 6.0 
Debt— 1,418.6 — 1,418.6 1,555.5 — 2,815.9 — 2,815.9 3,156.8