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Impairment and Other Charges (Tables)
12 Months Ended
Dec. 31, 2020
Impairments and Other Charges [Abstract]  
Restructuring and Related Costs The following table presents various pre-tax charges we recorded during the years ended December 31, 2020, 2019, and 2018 which are reflected within "Impairments and other charges" on our consolidated statements of operations.
Year Ended December 31
Millions of dollars202020192018
Long-lived asset impairments$2,629 $1,603 $— 
Inventory costs and write-downs505 458 — 
Severance 384 172 — 
Joint ventures— 154 — 
Venezuela investment write-down— — 265 
Other281 119 — 
Total impairments and other charges$3,799 $2,506 $265