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Interest Income and Other Non-Operating Income (Tables)
12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Schedule of Interest Income and Other Non-Operating Income, net

 
Years Ended December 31,
 
2019
 
2018
 
2017
Non-service pension and OPEB income
$
797


$
1,665


$
1,316

Interest income
429


335


266

Licensing agreements income
165


296


74

Revaluation of investments
80


258


(56
)
Other
(2
)

42


45

Total interest income and other non-operating income, net
$
1,469


$
2,596


$
1,645