Other (Income) Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Other Income and Expenses [Abstract]
Interest income	$ (85)	$ (97)
Interest expense	185	182
Exchange losses (gains)	7	(8)
Equity losses from affiliates	52	13
Net periodic defined benefit plan (credit) cost other than service cost	(135)	(129)
Other, net	(315)	(32)
Other (income) expense, net	$ (291)	$ (71)

Net Periodic Defined Benefits Expense (Reversal of Expense) Excluding Service Cost Component

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- Definition

Other nonoperating income and expense items not separately disclosed.

+ References

No definition available.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

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Amount of income (expense) related to nonoperating activities, classified as other.

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