Capitalized Exploratory Well Costs (Tables)

6 Months Ended

Jun. 30, 2015

Capitalized Exploratory Well Costs [Abstract]

Net Changes in Capitalized Exploratory Well Costs

The following table discloses the net changes in capitalized exploratory well costs pending determination of proved reserves for the six months ended June 30, 2015 (in millions):

Balance at January 1	$	1,416
Additions to capitalized exploratory well costs pending the determination of proved reserves		281
Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(72	)
Capitalized exploratory well costs charged to expense		(120	)
Balance at June 30, 2015	$	1,505