Capitalized Exploratory Well Costs (Tables)

6 Months Ended

Jun. 30, 2019

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 during the six months ended June 30, 2019 (in millions):

Balance at January 1, 2019	$	418
Additions to capitalized exploratory well costs pending the determination of proved reserves		101
Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(25	)
Balance at June 30, 2019	$	494