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Property, net (Tables)
 9 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Property, net
 
June 30,
2017
 
September 30,
2016
Property, at cost
$
2,024.0

 
$
1,900.3

Accumulated depreciation
(657.1
)
 
(545.9
)
 
$
1,366.9

 
$
1,354.4