Property and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 16,752.0	$ 15,822.1
Less: accumulated depreciation, depletion and amortization	(8,731.9)	(8,044.7)
Property and equipment, net	8,020.1	7,777.4
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	443.6	433.2
Non-depletable landfill land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	167.5	166.9
Landfill development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,106.0	6,757.3
Less: accumulated depreciation, depletion and amortization	(3,635.9)	(3,317.3)
Vehicles and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,377.3	6,954.3
Less: accumulated depreciation, depletion and amortization	(4,571.1)	(4,259.7)
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,279.8	1,221.5
Less: accumulated depreciation, depletion and amortization	(524.9)	(467.7)
Construction-in-progress - landfill
Property, Plant and Equipment [Line Items]
Property and equipment, gross	287.9	233.2
Construction-in-progress - other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 89.9	$ 55.7