Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Table Text Block [Abstract]

Supplemental Cash Flow Table

			Years Ended December 31,
millions			2012		2011		2010
Cash paid (received)
	Interest		$	684	$	806	$	672
	Income taxes			(300)		262		308
Non-cash investing activities
	Fair value of properties and equipment received in
		non-cash exchange transactions	$	65	$	19	$	37
	Gain related to the fair-value remeasurement of Anadarko’s
		pre-acquisition 7% equity interest in the Wattenberg Plant		—		21		—
Non-cash financing activities
	Capital lease obligation		$	—	$	(118)	$	226