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Other Expense (Income), Net
 9 Months Ended
Sep. 30, 2018
Other Income and Expenses [Abstract]  
Other Expense (Income), Net
Other Expense (Income), Net

Third quarter ended

Nine months ended
 
September 30,

September 30,

2018
 
2017

2018
 
2017
Non-service related net periodic benefit cost
$
27

 
$
39

 
$
83

 
$
116

Interest income
(6
)
 
(5
)
 
(16
)
 
(13
)
Foreign currency losses (gains), net
6

 
(1
)
 
20

 
(4
)
Net loss (gain) from asset sales
2

 
1

 
7

 
(514
)
Other, net
(21
)
 
4

 
(25
)
 
5

 
$
8

 
$
38

 
$
69

 
$
(410
)

For the third quarter and nine months ended September 30, 2018, Non-service related net periodic benefit cost included lower net actuarial losses as a result of pension actions taken during 2018 (see Note G). For the third quarter and nine months ended September 30, 2018, Other, net included a benefit from establishing a tax indemnification receivable of $29 reflecting Alcoa Corporation’s 49% share of a Spanish tax reserve (see Notes H and Q). For the nine months ended September 30, 2017, Net loss (gain) from asset sales included a gain on the sale of a portion of Arconic’s investment in Alcoa Corporation common stock of $351 that resulted in cash proceeds of $888 which were recorded in Sale of investments within Investing Activities in the Statement of Consolidated Cash Flows and a $167 gain on the debt-for-equity exchange with two investment banks (the “Investment Banks”) of the remaining portion of Arconic’s retained interest in Alcoa Corporation common stock for a portion of the Company’s outstanding notes held by the Investment Banks (the “Debt-for-Equity Exchange”).