Property, Plant and Equipment (Tables)

12 Months Ended

Sep. 30, 2011

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

	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