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Other (Income) Expense, Net (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Other Income and Expenses [Abstract] |  |
Interest income | $ (11) | $ (25)
Interest expense | 200 | 212
Exchange losses | 47 | 54
Income from investments in equity securities, net | (574) | (52)
Net periodic defined benefit plan (credit) cost other than service cost | (89) | (90)
Other, net | (21) | (28)
Other (income) expense, net | $ (448) | $ 71

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