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Other (Income) Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Interest income	$ (59)	$ (274)	$ (343)
Interest expense	831	893	772
Exchange losses	145	187	145
Income on investments in equity securities, net	(1,338)	(170)	(324)
Net periodic defined benefit plan (credit) cost other than service cost	(339)	(545)	(512)
Other, net	(126)	48	(140)
Other (income) expense, net	$ (886)	$ 139	$ (402)

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Other nonoperating income and expense items not separately disclosed.

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

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