Exploratory Costs (Tables)

3 Months Ended

Mar. 31, 2015

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 months ended March 31, 2015:

	Three Months Ended March 31, 2015
	(in millions)
Beginning capitalized exploratory costs	$	305
Additions to exploratory costs pending the determination of proved reserves	226
Reclassification due to determination of proved reserves	(216		)
Exploratory well costs charged to exploration expense	(5		)
Ending capitalized exploratory costs	$	310