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Property, net (Notes)
 6 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, net PROPERTY, NET
March 31,
2023		September 30,
2022
Property, at cost$23.0 $21.5 
Accumulated depreciation(14.7)(13.5)
   Property, net$8.3 $8.0