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Property, net (Notes)
 9 Months Ended
Jun. 30, 2020
Property, Plant and Equipment [Abstract]  
Property, net PROPERTY, NET
June 30,
2020		September 30,
2019
Property, at cost$21.4  $21.1  
Accumulated depreciation(11.5) (9.4) 
   Property, net$9.9  $11.7