Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Interest Expense									$ 647	$ 396	$ 265
Revenues	$ 22,978	$ 21,695	$ 25,190	$ 24,072	$ 25,939	$ 24,683	$ 27,284	$ 23,650	93,935	101,556	85,249
Cost of products sold									86,422	93,986	79,262
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total amount recognized in earnings									322	352	474
Designated As Hedging Instrument [Member] | Cost Of Products Sold [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings									322	351	490
Total amount recognized in earnings									$ 322	$ 351	$ 490
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]									Cost of products sold	Cost of products sold	Cost of products sold
Designated As Hedging Instrument [Member] | Sales [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings										$ 1	$ (16)
Commodity Contracts effective amount recognized in earnings									$ 0	0	0
Total amount recognized in earnings									$ 0	$ 1	$ (16)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]									Revenues	Revenues	Revenues