The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Revenues	$ 16,070	$ 14,827	$ 14,943	$ 14,988	$ 16,501	$ 15,832	$ 15,629	$ 14,384	$ 60,828	$ 62,346	$ 67,702
Nonoperating Income (Expense)									37	147	350
Cost of products sold									57,322	58,727	63,736
Total gain (loss) recognized in earnings									637	(352)	616
Nonoperating Income (Expense) [Member]
Derivative [Line Items]
FX Contracts									214	(225)	8
Total gain (loss) recognized in earnings									214	(225)	0
Cost Of Products Sold [Member]
Derivative [Line Items]
FX Contracts									58	291	(185)
Commodity Contracts									375	(383)	777
Total gain (loss) recognized in earnings									433	(92)	592
Sales [Member]
Derivative [Line Items]
FX Contracts									(10)	(35)	16
Total gain (loss) recognized in earnings									$ (10)	$ (35)	$ 16