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Impairments and Other Charges
 6 Months Ended
Jun. 30, 2019
Impairments and Other Charges [Abstract]  
Restructuring, Impairment, and Other Activities Disclosure Impairments and Other Charges
    
During the three and six months ended June 30, 2019, we recognized certain impairments and other charges as we continue to adjust our cost structure and footprint to the current operating environment. The following table presents various pre-tax charges we recorded during the three and six months ended June 30, 2019, in addition to the six months ended June 30, 2018, which are reflected within "impairments and other charges" on our condensed consolidated statements of operations. There were no impairments and other charges recorded during the three months ended June 30, 2018.
 
Three Months Ended
Six Months Ended
Millions of dollars
June 30, 2019
June 30, 2019
June 30, 2018
Long-lived asset impairments
$
108

$
150

$
—

Severance costs
58

77

—

Inventory write-downs
33

33

—

Venezuela investment write-down
—

—

265

Other
48

48

—

Total impairments and other charges
$
247

$
308

$
265