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Other (Income) Expense, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Other Income and Expenses [Abstract] |  |  |  |
Interest income | $ (75) | $ (81) | $ (164) | $ (165)
Interest expense | 233 | 194 | 442 | 379
Exchange losses | 27 | 71 | 128 | 77
Loss (income) from investments in equity securities | (58) | (153) | (32) | (178)
Net periodic defined benefit plan (credit) cost other than service cost | (140) | (130) | (281) | (265)
Other, net | 153 | 51 | 234 | (188)
Other (income) expense, net | $ 140 | $ (48) | $ 327 | $ (340)

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