Properties, including oil and gas properties, net (Tables)

12 Months Ended

Sep. 30, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Properties, including oil and natural gas properties, net, consist of the following:

	September 30, 2013			September 30, 2012
Oil and natural gas properties (full cost accounting method)
Unproved oil and natural gas properties and development costs not being amortized	$	36.4		$	—
Proved developed and undeveloped oil and natural gas properties	546.0			—
Less: Accumulated depletion	(30.1		)	—
Total oil and natural gas properties, net	552.3			—
Other properties
Land, buildings and improvements	169.8			93.6
Gas gathering assets	21.1			—
Machinery, equipment and other	488.3			325.7
Construction in progress	46.8			18.4
Total other properties, at cost	726.0			437.7
Less: Accumulated depreciation	285.0			216.1
Total other properties, net	441.0			221.6
Total properties, including oil and natural gas properties, net	$	993.3		$	221.6