Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Revenues	$ 18,893	$ 14,970
Cost of Products Sold	17,345	14,019
Other (Income) Expense - Net	(33)	(32)
Interest Expense	87	83
Total gain (loss) recognized in earnings	(914)	251
Revenues [Member]
Derivative [Line Items]
FX Contracts	30	35
Total gain (loss) recognized in earnings	30	35
Cost of Products Sold [Member]
Derivative [Line Items]
FX Contracts	(262)	(585)
Commodity Contracts	(782)	622
Total gain (loss) recognized in earnings	(1,044)	37
Interest Expense [Member]
Derivative [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	(20)
Total gain (loss) recognized in earnings	(20)
Other (Income) Expense - Net [Member]
Derivative [Line Items]
FX Contracts	120	124
Commodity Contracts	0	55
Total gain (loss) recognized in earnings	$ 120	$ 179