XML 30 R19.htm IDEA: XBRL DOCUMENT v3.5.0.2
Accounting for suspended exploratory well costs
6 Months Ended
Jun. 30, 2016
Accounting for suspended exploratory well costs
11. Accounting for suspended exploratory well costs

For the category of exploratory well costs at year-end 2015 that were capitalized for a period greater than 12 months, a total of $24 million was expensed in the second quarter of 2016.