Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property, plant and equipment
Property, plant and equipment, gross	$ 5,504		$ 5,405
Accumulated depreciation	(2,774)		(2,719)
Net property, plant and equipment	2,730		2,686
Depreciation expense	65	$ 59
Land
Property, plant and equipment
Property, plant and equipment, gross	71		70
Buildings
Property, plant and equipment
Property, plant and equipment, gross	1,036		1,023
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	4,037		3,904
Construction-in-progress
Property, plant and equipment
Property, plant and equipment, gross	$ 360		$ 408