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Impairment and Other Charges (Tables)
 12 Months Ended
Dec. 31, 2019
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, 2019, 2018 and 2017 which are reflected within "Impairments and other charges" on our consolidated statements of operations.

 
Year Ended December 31
Millions of dollars
2019
2018
2017
Long-lived asset impairments
$
1,603

$
—

$
—

Inventory costs and write-downs
458

—

—

Severance
172

—

—

Joint ventures
154

—

—

Venezuela investment write-down
—

265

647

Other
119

—

—

Total impairments and other charges
$
2,506

$
265

$
647