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Business Combinations - Additional Information (Details)
$ in Millions
6 Months Ended
Nov. 01, 2017
USD ($)
Engineering_Expert
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]      
Goodwill   $ 291 $ 292
Fotonic i Norden dp AB      
Business Acquisition [Line Items]      
Business combination, consideration transferred $ 17    
Consideration transferred in cash 15    
Deferred purchase consideration $ 2 $ 2  
Deferred purchase consideration period 18 months    
Number of Lidar and Time of Flight engineering experts acquired | Engineering_Expert 35    
Net assets acquired $ 17    
Business combination, intangible assets 4    
Goodwill $ 13    
Fotonic i Norden dp AB | IP      
Business Acquisition [Line Items]      
Intangible assets remaining useful life 5 years    
Intangible assets, amortization method   straight-line basis