Impairments	3 Months Ended
Mar. 31, 2020
Impairments [Abstract]
Impairments [Text Block]	Note 8—Impairments During the three-month periods ended March 31, 2020 and 2019, we recognized before-tax impairment charges within the following segments: Millions of Dollars Three Months Ended March 31 2020 2019 Lower 48 511 - Europe and North Africa 10 1 $ 521 1 We perform impairment reviews when triggering events arise that may impact the fair value of our assets or investments. The recent commodity price downturn prompted us to evaluate the recoverability of the carrying value of our assets and whether an other than temporary impairment occurred for investments in our portfolio. A sustained decline in the current and long-term outlook on commodity prices could trigger additional impairment reviews and possibly result in future impairment charges. With respect to impairments recorded in the first quarter of 2020, due to a significant decrease in the outlook for current and long-term natural gas prices, the estimated fair values of certain non-core natural gas assets in the Lower 48 segment declined to amounts below carrying value. We recorded impairments of $ 511 million for these non-core natural gas assets, primarily related to the Wind River Basin operations area consisting of developed properties in the Madden Field and the Lost Cabin Gas Plant, which were written down to fair value. See Note 14—Fair Value Measurement, for additional information. In our Asia Pacific and Middle East segment, we recorded a before-tax impairment of $ 31 million related to the associated carrying value of capitalized undeveloped leasehold costs for the Kamunsu East Field in Malaysia that is no longer in our development plans. This charge is included in the “Exploration expenses” line on our consolidated income statement and is not reflected in the table above.

We perform impairment reviews when triggering events arise that may impact the

fair value of our assets or

investments.

The recent commodity price downturn prompted

us to evaluate the recoverability of the carrying

value of our assets and whether an other than temporary

impairment occurred for investments

in our portfolio.

A sustained decline in the current and long-term

outlook on commodity prices could trigger

additional

impairment reviews and possibly result in

future impairment charges.

With respect to impairments recorded in the first quarter of 2020, due

to a significant decrease in the outlook

for current and long-term natural gas prices,

the estimated fair values of certain non-core

natural gas assets in

the Lower 48 segment declined to amounts below

carrying value.

We recorded impairments of $

511

million

for these non-core natural gas assets, primarily

related to the Wind River Basin operations area consisting of

developed properties in the Madden Field and the

Lost Cabin Gas Plant,

which were written down to fair

value.

See Note 14—Fair Value Measurement,

for additional information.

In our Asia Pacific and Middle East segment,

we recorded a before-tax impairment of $

million related to

the associated carrying value of capitalized undeveloped

leasehold costs for the Kamunsu East Field in

Malaysia that is no longer in our development plans.

This charge is included in the “Exploration expenses”

line on our consolidated income statement and

is not reflected in the table above.