Impairments	12 Months Ended
Dec. 31, 2021
Impairments [Abstract]
Impairments	Note 7—Impairments During 2021, 2020 and 2019, we recognized the following before-tax impairment charges: Millions of Dollars 2021 2020 2019 Alaska $ 5 - - Lower 48 (8) 804 402 Canada 6 3 2 Europe, Middle East and North Africa (24) 6 1 Asia Pacific 695 - - $ 674 813 405 2021 We recorded an impairment of $ 688 million on our APLNG investment included within the Asia Pacific segment. See Note 4 and Note 13 . In our Lower 48 segment, we recorded a credit to impairment of $ 89 million due to a decreased ARO estimate for a previously sold asset, in which we retained the ARO liability. This was offset by recorded impairments of $ 84 million during the fourth quarter of 2021, related to certain noncore assets due to changes in development plans. See Note 13 . In our Europe, Middle East and North Africa segment, we recorded a credit to impairment of $ 24 million due to decreased ARO estimates on fields in Norway which ceased production and were fully depreciated in prior years. 2020 We recorded impairments of $ 813 million, primarily related to certain noncore assets in the Lower 48. Due to a significant decrease in the outlook for current and long-term natural gas prices in early 2020, we recorded impairments of $ 523 million, primarily for the Wind River Basin operations area, consisting of developed properties in the Madden Field and the Lost Cabin Gas Plant, in the first quarter of 2020. Additionally, due primarily to changes in development plans solidified in the last quarter of 2020, we recognized additional impairments of $ 287 million in the Lower 48 during the fourth quarter. See Note 13 . 2019 In the Lower 48, we recorded impairments of $ 402 million, primarily related to developed properties in our Niobrara asset which were written down to fair value less costs to sell. See Note 3 .

2021

We recorded an impairment

of $

688

million on our APLNG investment included within

the Asia Pacific segment.

See

Note 4

and

Note 13

In our Lower 48 segment, we recorded

a credit to impairment of $

million due to a decreased ARO estimate

for a

previously sold asset, in which we retained

the ARO liability.

This was offset by recorded

impairments of $

million during the fourth quarter of 2021, related

to certain noncore assets

due to changes in development plans.

See Note 13

In our Europe, Middle East and North

Africa segment, we recorded a credit

to impairment of $

million due to

decreased ARO estimates on fields

in Norway which ceased production and

were fully depreciated in prior years.

2020

We recorded impairments

of $

813

million, primarily related to certain

noncore assets in the Lower 48.

Due to a

significant

decrease in the outlook for current and

long-term natural gas prices

in early 2020, we recorded

impairments of $

523

million, primarily for the Wind River Basin operations

area, consisting of developed

properties in the Madden Field and the Lost Cabin

Gas Plant, in the first quarter of 2020.

Additionally,

due

primarily to changes in development plans

solidified in the last quarter of 2020, we recognized

additional

impairments of $

287

million in the Lower 48 during the fourth

quarter.

See Note 13

2019

In the Lower 48, we recorded impairments

of $

402

million, primarily related to developed

properties in our

Niobrara asset which were written

down to fair value less costs

to sell.

See Note 3