Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gains (Loss) [Line Items]
Revenues	$ 18,893	$ 14,970
Cost of Products Sold	17,345	14,019
Interest Expense	87	83
Other (Income) Expense - Net	(33)	(32)
Designated As Hedging Instrument [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	75	(44)
Designated As Hedging Instrument [Member] | Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	(14)	(25)
Commodity Contracts effective amount recognized in earnings	0	5
Total amount recognized in earnings	(14)	(20)
Designated As Hedging Instrument [Member] | Cost of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	89	(24)
Total amount recognized in earnings	89	(24)
Designated As Hedging Instrument [Member] | Interest Expense [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	0	0
Total amount recognized in earnings	0	0
Designated As Hedging Instrument [Member] | Other (Income) Expense - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	(14)
Commodity Contracts effective amount recognized in earnings	0	0
Total amount recognized in earnings	$ 0	$ 0