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Impairments (Tables)
12 Months Ended
Dec. 31, 2023
Asset Impairment Charges [Abstract]  
Schedule of Before-tax Impairment Charges
During 2023, 2022 and 2021, we recognized the following before-tax impairment charges:
Millions of Dollars
202320222021
Alaska$ 
Lower 487 (11)(8)
Canada6 (2)
Europe, Middle East and North Africa (1)(24)
Asia Pacific — 695 
Corporate and Other1 — — 
$14 (12)674