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Other income (expense) (Tables)
 3 Months Ended
Mar. 31, 2019
Other Income and Expenses [Abstract]  
Other income (expense)
 
 
Three Months Ended March 31
(Millions of dollars)
 
2019
 
2018
Investment and interest income
 
$
52

 
$
36

Foreign exchange gains (losses) 1
 
18

 
(19
)
License fee income
 
25

 
31

Net periodic pension and OPEB income (cost), excluding service cost
 
26

 
86

Gains (losses) on securities
 
39

 
(2
)
Miscellaneous income (loss)
 
—

 
(5
)
Total
 
$
160

 
$
127

1 Includes gains (losses) from foreign exchange derivative contracts. See Note 5 for further details.