Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 643	$ 610
Less accumulated depreciation	(369)	(351)
Property, plant and equipment, net	274	259
Depreciation expense	68	72	$ 78
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	68	63
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7	7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	248	232
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	25	20
Software and computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	162	168
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	92	84
Projects in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 41	$ 36