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, 2020	Mar. 31, 2019
Derivative [Line Items]
Revenues	$ 14,970	$ 15,304
Cost of Products Sold	14,019	14,376
Other (Income) Expense - Net	(32)	(8)
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total gain (loss) recognized in earnings	251	98
Revenues [Member] | Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
FX Contracts	35	8
Total gain (loss) recognized in earnings	35	8
Cost of Products Sold [Member] | Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
FX Contracts	(585)	0
Commodity Contracts	622	120
Total gain (loss) recognized in earnings	37	120
Other (Income) Expense - Net [Member] | Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
FX Contracts	124	(30)
Commodity Contracts	55
Total gain (loss) recognized in earnings	$ 179	$ (30)