Property, Plant and Equipment, Net of Accumulated Depreciation (Property, Plant and Equipment, Net of Accumulated Depreciation) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment	$ 28,332	$ 26,827
Accumulated depreciation	(12,995)	(11,932)
Property and equipment, net	15,337	14,895
Land [Member]
Property, plant and equipment	452	467
Building [Member]
Property, plant and equipment	6,023	5,924
Equipment [Member]
Property, plant and equipment	19,100	18,078
Construction in Progress [Member]
Property, plant and equipment	$ 2,757	$ 2,358

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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