Description of Business and Summary of Significant Accounting Policies - Useful Lives of Property and Equipment, Net (Details)	12 Months Ended
	Dec. 31, 2019
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Dockless e-bikes
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Internal-use software
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Minimum \| Site improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Minimum \| Leased vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Minimum \| Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Minimum \| Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Maximum \| Site improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Maximum \| Leased vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Maximum \| Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Maximum \| Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years