Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gains (Loss) [Line Items]
Revenues	$ 16,726	$ 15,800	$ 48,327	$ 48,394
Cost of Products Sold	15,648	14,742	45,349	45,266
Interest Expense	97	87	307	267
Other (Income) Expense - Net	(18)	(25)	(39)	(42)
Designated As Hedging Instrument [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	(17)	(72)	(27)	(98)
Designated As Hedging Instrument [Member] \| Other (Income) Expense - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	(21)		(29)
Commodity Contracts effective amount recognized in earnings	0	0		0
Total amount recognized in earnings	(21)	0	(29)	0
Designated As Hedging Instrument [Member] \| Interest Expense [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	0		0	1
Total amount recognized in earnings	0	0	0	1
Designated As Hedging Instrument [Member] \| Cost of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	1	(87)	7	(115)
Total amount recognized in earnings	1	(87)	7	(115)
Designated As Hedging Instrument [Member] \| Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	3	15	(5)	16
Total amount recognized in earnings	$ 3	$ 15	$ (5)	$ 16

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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