Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gains (Loss) [Line Items]
Revenues	$ 16,281	$ 16,297	$ 31,251	$ 31,601
Cost of Products Sold	15,173	15,325	29,192	29,701
Interest Expense	87	109	170	210
Other (Income) Expense - Net	(67)	(13)	(99)	(21)
Designated As Hedging Instrument [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	(57)	0	(101)	(10)
Designated As Hedging Instrument [Member] | Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	3	5	8	(8)
Total amount recognized in earnings	3	5	8	(8)
Designated As Hedging Instrument [Member] | Cost of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(36)	1	(60)	6
Total amount recognized in earnings	(36)	1	(60)	6
Designated As Hedging Instrument [Member] | Interest Expense [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	(8)	0	(8)	0
Total amount recognized in earnings	(8)	0	(8)	0
Designated As Hedging Instrument [Member] | Other (Income) Expense - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	(16)	(6)	(41)	(8)
Commodity Contracts effective amount recognized in earnings	0	0		0
Total amount recognized in earnings	$ (16)	$ (6)	$ (41)	$ (8)