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Cash Flow Information (Tables)
12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]  
Cash Flow Information
 
Millions of Dollars
 
2016

 
2015

 
2014

Cash Payments (Receipts)
 
 
 
 
 
Interest
$
311

 
275

 
238

Income taxes*
(375
)
 
1,560

 
2,185


*2016 reflects a net cash refund position; cash payments for income taxes were $385 million.