Property and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 619.8	$ 550.3
Less: Accumulated depreciation and amortization	(343.8)	(300.4)
Total property and equipment, net	276.0	249.9
Depreciation and amortization expenses	51.1	44.3	$ 42.2
Delivery, warehouse and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	460.3	409.1
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	90.6	87.8
Land and buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	52.0	52.4
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16.9	1.0
Equipment Under Finance Lease
Property, Plant and Equipment [Line Items]
Property and equipment, gross	103.7
Equipment capital leases
Property, Plant and Equipment [Line Items]
Property and equipment, gross		56.2
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 20.6
Warehouse equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 21.8