Segment Information Property, Plant and Equipment by Geography (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 341	$ 287
UNITED STATES
Segment Reporting Information [Line Items]
Property, plant and equipment, net	204	139
Americas (Excluding United States) [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	19	21
EMEA
Segment Reporting Information [Line Items]
Property, plant and equipment, net	75	70
APJ [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 43	$ 57