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Other Income (expense)
 6 Months Ended
Jun. 30, 2018
Other Income (expense) [Abstract]  
Other income (expense)
Other income (expense)

 
 
Three Months Ended
June 30
 
Six Months Ended June 30
 
(Millions of dollars)
 
2018
 
2017
 
2018
 
2017
 
Investment and interest income
 
$
45

 
$
32

 
$
81

 
$
54

 
Foreign exchange gains (losses) 1
 
(60
)
 
(112
)
 
(79
)
 
(160
)
 
License fee income
 
36

 
24

 
67

 
46

 
Gain on sale of affiliated company
 
—

 
85

2 

—

 
85

2 

Net periodic pension and OPEB income (cost), excluding service cost
 
86

 
67

 
172

 
104

 
Miscellaneous income (loss)
 
14

 
—

 
7

 
(1
)
 
Total
 
$
121

 
$
96

 
$
248

 
$
128

 
1 Includes gains (losses) from foreign exchange derivative contracts. See Note 5 for further details.
2 Pretax gain related to the sale of Caterpillar's equity interest in Iron Planet Holdings Inc.