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Other (Income)/Deductions - Net
 6 Months Ended
Jun. 30, 2020
Other Income and Expenses [Abstract]  
Other (Income)/Deductions - Net
7. Other (Income)/Deductions—Net
The components of Other (income)/deductions—net are as follows:
Three Months EndedSix Months Ended
June 30,June 30,
(MILLIONS OF DOLLARS)2020201920202019
Royalty-related income$(5) $(3) $(6) $(8) 
Interest income(2) (9) (8) (19) 
Identifiable intangible asset impairment charges3  —  3  —  
Net gain on sale of assets(a)
(1) —  (18) —  
Foreign currency loss(b)
6  7  11  7  
Impairment of an equity investment4  —  4  —  
Other, net—  (1) (1) —  
Other (income)/deductions—net$5  $(6) $(15) $(20) 
(a) For the six months ended June 30, 2020, primarily represents a net gain resulting from net cash proceeds received pursuant to an agreement related to the 2016 sale of certain U.S. manufacturing sites. 
(b) Primarily driven by costs related to hedging and exposures to certain emerging and developed market currencies.