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Goodwill and Intangible Assets, Net (Tables)
 9 Months Ended
Sep. 30, 2021
Business Combinations [Abstract]  
Schedule of Intangible Assets and Goodwill The following table summarizes intangible assets and goodwill related to the Car360 acquisition as of September 30, 2021 and December 31, 2020:
Useful LifeSeptember 30,
2021		December 31,
2020
(in millions)
Intangible assets:
Developed technology7 years$9 $9 
Non-compete agreements5 years1 1 
Intangible assets, acquired cost10 10 
Less: accumulated amortization(5)(4)
Intangible assets, net$5 $6 
GoodwillN/A$9 $9 
Schedule of Anticipated Future Annual Amortization Expense The anticipated annual amortization expense to be recognized in future years as of September 30, 2021, is as follows:
Expected Future
Amortization
(in millions)
Remainder of 2021$1 
20221 
20231 
20241 
20251 
Thereafter— 
Total$5