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Other Income, Net
 12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
OTHER INCOME, NET OTHER INCOME, NET

Other income consists of various line items that are combined on the income statement due to their respective materiality compared with other individual income and expense items.

The amounts included in Other income, net for the years ended December 31 were as follows (in millions):
 
2017
 
2018
 
2019
Gains / (Losses) on derivatives
$
11

 
$
(165
)
 
$
(190
)
Currency revaluation gains / (losses)
44

 
12

 
70

Interest and investment income (a)
112

 
198

 
318

Other
83

 
35

 
16

Total other income, net
$
250

 
$
80

 
$
214

__________
(a)
Includes interest income primarily on notes receivable from affiliated companies of $9 million, $10 million, and $5 million for December 31, 2017, 2018, and 2019, respectively.