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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
 December 31,
(In millions)20222021
United States $17,034 $14,097 
International288 347 
Not allocated to segments55 55 
Net property, plant and equipment$17,377 $14,499 
Changes in our capitalized exploratory well costs were as follows:
 December 31,
(In millions)202220212020
Beginning balance as of January 1$162 $210 $278 
Additions78 50 97 
Charges to expense(30)(30)(1)
Transfers to development(96)(68)(164)
Ending balance as of December 31$114 $162 $210 
As of December 31, 2022 and 2021, we had $20 million and $80 million, respectively, of exploratory well costs capitalized greater than one year related to suspended wells. Management believes these wells exhibit sufficient quantities of hydrocarbons to justify potential development. The majority of the suspended wells require completion activities and installation of infrastructure in order to classify the reserves as proved. The decrease during the year ended December 31, 2022 included a $46 million reduction in suspended well costs as we resumed drilling or completion activities and brought previously suspended wells to sales. Additionally, we recorded $14 million of expense associated with drilled and uncompleted exploratory wells, primarily in Louisiana Austin Chalk.
Of the $20 million of exploratory well costs capitalized greater than one year related to suspended well as of December 31, 2022, approximately $2 million pertains to 2020, $12 million to 2019, and the remaining $6 million attributable to 2018 activities.