Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Interest expense	$ 265	$ 339	$ 402
Revenues	85,249	64,355	64,656
Cost of products sold	79,262	59,902	60,509
Sales [Member]
Derivative [Line Items]
Total amount recognized in earnings		(68)	(90)
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total amount recognized in earnings	474	(45)	(100)
Designated As Hedging Instrument [Member] | Interest Expense [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	0	(2)	1
Total amount recognized in earnings	0	(2)	1
Designated As Hedging Instrument [Member] | Cost Of Products Sold [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings	490	27	(11)
Total amount recognized in earnings	490	27	(11)
Designated As Hedging Instrument [Member] | Sales [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	(16)	(75)	(46)
Commodity Contracts effective amount recognized in earnings	0	7	(44)
Total amount recognized in earnings	(16)
Designated As Hedging Instrument [Member] | Other Nonoperating Income (Expense)
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	0	0
Commodity Contracts effective amount recognized in earnings	0	(2)
Total amount recognized in earnings	$ 0	$ (2)	$ 0