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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Product Warranty Reserves The following table summarizes the changes in total product warranty liability reserves for the periods presented:
Product Warranty
Millions of dollars20202019
Balance at January 1$383 $268 
Issuances/accruals during the period178 329 
Settlements made during the period/other(272)(208)
Balance at September 30
$289 $389 
Current portion$186 $262 
Non-current portion104 127 
Total$289 $389