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Financing Arrangements (Tables)
3 Months Ended
Mar. 31, 2018
Financing Arrangements [Abstract]  
Schedule of Notes Payable
The following table summarizes the carrying value of notes payable at March 31, 2018 and December 31, 2017, respectively.
Millions of dollars
 
March 31, 2018
 
December 31, 2017
Commercial paper
 
$
765

 
$
401

Short-term borrowings due to banks
 
295

 
49

Total notes payable
 
$
1,060

 
$
450