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Other (Income) Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Interest income	$ (81)	$ (96)	$ (165)	$ (194)
Interest expense	194	193	379	375
Exchange losses	71	19	77	11
Equity (gains) losses from affiliates	(64)	(5)	(12)	8
Net periodic defined benefit plan (credit) cost other than service cost	(130)	(131)	(265)	(260)
Other, net	(38)	(53)	(354)	(83)
Other (income) expense, net	$ (48)	$ (73)	$ (340)	$ (143)

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Other nonoperating income and expense items not separately disclosed.

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