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Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Cost of revenue, exclusive of depreciation and amortization shown separately below	$ 2,438	$ 1,298	$ 6,247	$ 3,713
Contract liabilities	195		$ 195
Collaboration agreement period (in years)			3 years
Connection Services Fees
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	90	61	$ 216	253
Delivery Fees
Disaggregation of Revenue [Line Items]
Revenue excluding vehicle solutions revenue	228	28	490	49
Cost of revenue, exclusive of depreciation and amortization shown separately below	$ 642	$ 119	$ 1,500	$ 269

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