Exploratory Costs (Tables)

9 Months Ended

Sep. 30, 2014

Exploratory Cost Disclosure [Abstract]

Capitalized exploratory well and project activity

The following table reflects the Company's capitalized exploratory well and project activity during the three and nine months ended September 30, 2014:

	Three Months Ended September 30, 2014			Nine Months Ended September 30, 2014
	(in millions)
Beginning capitalized exploratory costs	$	322		$	159
Additions to exploratory costs pending the determination of proved reserves	586			1,275
Reclassification due to determination of proved reserves	(466		)	(941		)
Disposition of assets	(16		)	(52		)
Impairment of properties	(1		)	(12		)
Exploratory well costs charged to exploration expense	(1		)	(5		)
Ending capitalized exploratory costs	$	424		$	424

Aging of capitalized exploratory costs and the number of projects for which exploratory costs have been capitalized

The following table provides an aging, as of September 30, 2014 and December 31, 2013, of capitalized exploratory costs and the number of projects for which exploratory costs have been capitalized for a period greater than one year based on the date drilling was completed:

	September 30, 2014		December 31, 2013
	(in millions, except project counts)
Capitalized exploratory costs that have been suspended:
One year or less	$	416	$	116
More than one year	8		43
	$	424	$	159
Number of projects with exploratory costs that have been suspended for a period greater than one year	3		1