v3.7.0.1
Impairments (Tables)
3 Months Ended
Mar. 31, 2017
Impairment Of Long Lived Assets [Abstract]  
Impairment charges by segment before tax.
Note 7—Impairments
During the three-month periods ended March 31, 2017 and 2016, we recognized before-tax impairment charges within the following segments:
Millions of Dollars
Three Months Ended
March 31
20172016
Alaska$174-
Lower 48-9
Europe and North Africa1127
$175136