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Other income (expense)
 12 Months Ended
Dec. 31, 2014
Other Income and Expenses [Abstract]  
Other income (expense)
Other income (expense)
 
 
 
Years ended December 31,
(Millions of dollars)
 
2014
 
2013
 
2012
Investment and interest income
 
$
66

 
$
84

 
$
82

Foreign exchange gains (losses) 1 
 
54

 
(254
)
 
(116
)
License fee income
 
128

 
114

 
99

Gains (losses) on sale of securities and affiliated companies
 
36

 
21

 
4

Miscellaneous income (loss)
 
(45
)
 
—

 
61

Total
 
$
239

 
$
(35
)
 
$
130

1 
Includes gains (losses) from foreign exchange derivative contracts.  See Note 3 for further details.