Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 28, 2019	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Significant Accounting Policies [Line Items]
Referral coupons expiry term		1 year
Cumulative stock-based compensation expense	$ 857,200	$ 859,486	$ 1,996
Operating lease right of use assets		304,605		$ 285,600
Operating lease liabilities		337,431		314,100
Deferred rent				$ 28,500
Driver Passenger and Light Vehicle Renter Incentive Programs
Significant Accounting Policies [Line Items]
Cost of revenue		139,600	133,500
Sales and marketing		120,900	61,000
Express Drive Partner Program
Significant Accounting Policies [Line Items]
Sublease revenue		17,500	$ 2,600
Operating lease right of use assets		85,821
Operating lease liabilities		$ 91,152
Minimum
Significant Accounting Policies [Line Items]
Fleet operating costs period		2 years
Maximum
Significant Accounting Policies [Line Items]
Fleet operating costs period		3 years