Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Mar. 28, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019
Significant Accounting Policies [Line Items]
Referral coupons expiry term				1 year
Cumulative stock-based compensation expense	$ 857,200			$ 1,152,724	$ 3,497
Operating lease right of use assets		$ 347,027		347,027		$ 285,600
Operating lease liabilities		387,622		387,622		314,100
Deferred rent						$ 28,500
Driver Passenger and Light Vehicle Renter Incentive Programs
Significant Accounting Policies [Line Items]
Reduction of revenue		150,500	$ 136,100	290,100	269,600
Sales and marketing		83,500	60,000	204,400	120,900
Express Drive Partner Program
Significant Accounting Policies [Line Items]
Sublease revenue		26,700	$ 11,600	44,200	$ 14,100
Operating lease right of use assets		110,650		110,650
Operating lease liabilities		$ 119,822		$ 119,822
Minimum
Significant Accounting Policies [Line Items]
Fleet operating costs period				2 years
Maximum
Significant Accounting Policies [Line Items]
Fleet operating costs period				3 years