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Inventories (Tables)
12 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories comprise the following at September 30:
 
2019
 
2018
Non-utility LPG and natural gas
$
150.2

 
$
231.7

Gas Utility natural gas
26.6

 
37.3

Materials, supplies and other
53.1

 
49.2

Total inventories
$
229.9

 
$
318.2