Property and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 491.8
Property and equipment, gross	$ 550.3
Less: Accumulated depreciation and amortization	(300.4)
Less: Accumulated depreciation and amortization		(262.8)
Total property and equipment, net	249.9
Total property and equipment, net	249.9	229.0
Depreciation and amortization expenses	44.3	42.2	$ 37.4
Delivery, warehouse and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		355.0
Property and equipment, gross	409.1
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	87.8	86.4
Land and buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross		50.0
Property and equipment, gross	52.4
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1.0	0.4
Equipment Under Finance Lease
Property, Plant and Equipment [Line Items]
Property and equipment, gross	56.2
Equipment capital leases
Property, Plant and Equipment [Line Items]
Property and equipment, gross		19.7
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 21.8
Warehouse equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 20.6