Property and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 19,782.0	$ 18,557.8
Less: accumulated depreciation, depletion and amortization	(10,549.9)	(9,831.6)
Property and equipment, net	9,232.1	8,726.2
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	694.9	633.4
Landfill development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,539.6	7,991.7
Less: accumulated depreciation, depletion and amortization	(4,625.6)	(4,249.5)
Vehicles and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,576.9	8,119.0
Less: accumulated depreciation, depletion and amortization	(5,231.6)	(4,953.4)
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,508.4	1,402.5
Less: accumulated depreciation, depletion and amortization	(692.7)	(628.7)
Construction-in-progress – landfill
Property, Plant and Equipment [Line Items]
Property and equipment, gross	279.3	303.8
Construction-in-progress - other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 182.9	$ 107.4