Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2012

Classification Of Property, Plant And Equipment

	Depreciable		September 30,			December 31,
	Life		2012			2011
			(Millions)
Gathering and transmission systems		20 — 50 Years	$	1,307.5		$	1,211.9
Processing, storage, and terminal facilities		35 — 60 Years		820.1			742.8
Other		3 — 30 Years		24.4			23.1
Construction work in progress				261.7			218.3
Property, plant and equipment				2,413.7			2,196.1
Accumulated depreciation				(739.9	)		(696.7	)
Property, plant and equipment, net			$	1,673.8		$	1,499.4