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Other Income, Net (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Component of Other Income, Nonoperating [Line Items]      
Gains/(Losses) on derivatives $ 341 $ (190) $ (165)
Currency revaluation gains/(losses) (437) 70 12
Interest and investment income 119 318 198
Other 0 16 35
Total other income, net 23 214 80
Affiliated Entity [Member]      
Component of Other Income, Nonoperating [Line Items]      
Related Party Transaction, Interest Income, Notes Receivable, Tax Sharing Agreement $ 13 $ 5 $ 10