Capitalized Exploratory Well Costs (Tables)

6 Months Ended

Jun. 30, 2011

Capitalized Exploratory Well Costs [Abstract]

Net changes in capitalized exploratory well costs

Balance at January 1	$	1,783
Additions to capitalized exploratory well costs pending the determination of proved reserves		428
Reclassification to wells, facilities, and equipment based on the determination of proved reserves		(68	)
Capitalized exploratory well costs charged to expense		(70	)
Dispositions		(11	)
Balance at end of period	$	2,062