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Financing Arrangements (Tables)
6 Months Ended
Jun. 30, 2015
Financing Arrangements [Abstract]  
Schedule of Notes Payable
Millions of dollars
 
June 30, 2015
 
December 31, 2014
Commercial paper
 
$
645

 
$
387

Debt securitization
 

 
35

Short-term borrowings to banks
 
95

 
147

Total notes payable
 
$
740

 
$
569