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Impairments and Other Charges (Tables)
9 Months Ended
Sep. 30, 2021
Restructuring and Related Activities [Abstract]  
Impairments and Other Charges The following table presents various pre-tax charges we recorded during the three and nine months ended September 30, 2021 and 2020, which are reflected within "Impairments and other charges" on our condensed consolidated statements of operations.
Three Months Ended
September 30
Nine Months Ended
September 30
Millions of dollars2021202020212020
Catch-up depreciation$36 $— $36 $— 
Severance costs15 83 15 356 
Long-lived asset impairments— 31 — 2,299 
Inventory costs and write-downs— 11 — 505 
Gain on real estate transaction(74)— (74)— 
Other35 35 193 
Total impairments and other charges$12 $133 $12 $3,353