Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.20.4
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]      
Contract period (or less) 1 year    
Activation fee revenue recognition period (months) 1 month    
Advertising expense $ 443 $ 392 $ 267
Engineering, design and development 263 280 123
Engineering, Design and Development      
Disaggregation of Revenue [Line Items]      
Engineering, design and development $ 220 $ 231 $ 106
Minimum      
Disaggregation of Revenue [Line Items]      
Percent of deferred revenue related to long-term contracts 10.00%    
Data trial contract period 3 years    
Minimum | Prepaid Vehicle Subscriptions      
Disaggregation of Revenue [Line Items]      
Contract period (or less) 3 months    
Maximum      
Disaggregation of Revenue [Line Items]      
Data trial contract period 5 years    
Subscription prepayment period 3 years    
Maximum | Prepaid Vehicle Subscriptions      
Disaggregation of Revenue [Line Items]      
Contract period (or less) 12 months