Impairments	6 Months Ended
Jun. 30, 2020
Impairments [Abstract]
Impairments	Note 8—Impairments During the three- and six-month periods ended June 30, 2020 and 2019, we recognized before-tax impairment charges within the following segments: Millions of Dollars Three Months Ended Six Months Ended June 30 June 30 2020 2019 2020 2019 Lower 48 2 - 513 - Europe and North Africa (4) 1 6 2 $ (2) 1 519 2 We perform impairment reviews when triggering events arise that may impact the fair value of our assets or investments. We observed volatility in commodity prices during the first six-months of 2020. A decline in commodity prices beginning in March 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. For certain non-core natural gas assets in the Lower 48, a significant decrease in the outlook for current and long-term natural gas prices resulted in a decline in the estimated fair values to amounts below carrying value. Accordingly, in the first quarter of 2020, we recorded impairments of $ 511 million related to these non-core natural gas assets, primarily for 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. 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. We recorded a before-tax impairment in the first quarter of 2020 of $ 31 million in our Asia Pacific and Middle East segment 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.

We observed volatility in commodity prices during the first six-months of 2020.

A decline in commodity

prices beginning in March 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.

For certain non-core

natural gas assets in the Lower 48, a significant decrease

in the outlook for current and long-term natural

gas

prices resulted in a decline in the estimated fair

values to amounts below carrying value.

Accordingly, in the

first quarter of 2020, we recorded impairments of

511

million related to these non-core natural gas assets,

primarily for 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.

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.

We recorded a before-tax impairment in the first quarter of 2020 of $

million in our Asia Pacific and Middle

East segment 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.