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Property, Plant and Equipment
12 Months Ended
Sep. 30, 2011
Property, Plant and Equipment [Abstract] 
Property, Plant and Equipment
Note 10 — Property, Plant and Equipment
Property, plant and equipment comprise the following at September 30:
                 
    2011     2010  
Utilities:
               
Distribution
  $ 1,951.9     $ 1,866.0  
Transmission
    83.4       78.2  
General and other, including work in process
    165.7       185.1  
 
           
Total Utilities
    2,201.0       2,129.3  
 
           
 
Non-utility:
               
Land
    98.5       94.1  
Buildings and improvements
    214.8       206.4  
Transportation equipment
    112.6       111.3  
Equipment, primarily cylinders and tanks
    2,127.6       2,020.3  
Electric generation
    230.0       97.9  
Other, including work in process
    300.0       310.4  
 
           
Total non-utility
    3,083.5       2,840.4  
 
           
Total property, plant and equipment
  $ 5,284.5     $ 4,969.7