Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 employee	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Percentage of employees terminated		17.00%
Number of positions furloughed | employee		300
Accounts receivable	$ 89.4			$ 89.4		$ 120.0
Allowance for credit loss	16.2			16.2		$ 6.2
Provisions for expected credit losses				12.2
Write-offs				2.2
Driver Passenger and Light Vehicle Renter Incentive Programs
Significant Accounting Policies [Line Items]
Reduction of revenue	125.0		$ 126.1	295.6	$ 416.2
Sales and marketing	$ 11.0		$ 78.3	$ 115.0	$ 282.7