Property, Plant and Equipment (Schedule of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 23,967		$ 24,130
Building [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	4,495		4,468
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	17,534		17,410
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	514		506
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	1,424	[1]	$ 1,746
Asset impairment charges	$ 435

[1] The decrease in construction is the result of an impairment charge of $435 related to the company's uncompleted ERP system. See Note 4 for additional information.