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Property, net (Notes)
6 Months Ended
Mar. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, net PROPERTY, NET
March 31,
2024
September 30,
2023
Property, at cost$22.0 $24.0 
Accumulated depreciation(13.5)(15.5)
   Property, net$8.5 $8.5