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Inventories (Tables)
3 Months Ended
Dec. 31, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories comprise the following:
 
 
 
December 31,
2012
 
September 30,
2012
 
December 31,
2011
Non-utility LPG and natural gas
 
$
265.9

 
$
240.7

 
$
249.1

Gas Utility natural gas
 
51.8

 
57.7

 
87.7

Materials, supplies and other
 
60.8

 
58.5

 
53.9

Total inventories
 
$
378.5

 
$
356.9

 
$
390.7