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Impairments (Tables) | 12 Months Ended
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Dec. 31, 2019
Impairment Of Long Lived Assets [Abstract] |
Impairment Charges By Segment Before Tax | Note 9—Impairments During 2019, 2018 and 2017, we recognized the following before-tax impairment charges: Millions of Dollars 2019 2018 2017 Alaska $ - 20 180 Lower 48 402 63 3,969 Canada 2 9 22 Europe, Middle East and North Africa 1 (79) 46 Asia Pacific - 14 2,384 $ 405 27 6,601

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