Business Acquisition and Divestiture - Schedule of Preliminary Purchase Price Allocation to Intangible Assets Acquired (Details) - Xplore Technologies Corporation $ in Millions	Aug. 14, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 32
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 16
Life (in years)	9 years
Current technology
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 15
Life (in years)	7 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 1
Life (in years)	3 years