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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2021
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 dollars20212020
Balance at January 1$273 $383 
Issuances/accruals during the period185 108 
Settlements made during the period/other(149)(203)
Balance at June 30
$309 $288 
Current portion$210 $187 
Non-current portion99 101 
Total$309 $288