Property, Plant and Equipment (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,585	$ 15,537
Accumulated depreciation	(6,531)	(6,804)
Property, plant and equipment, net	8,054	8,733
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	402	422
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,961	3,140
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,669	11,295
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 553	$ 680