Revenue and Credit Losses - Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,413.6	$ 2,812.3	$ 6,383.7	$ 5,408.2
Revenue as a percentage of total revenue	100.00%	100.00%	100.00%	100.00%
Transfer
Disaggregation of Revenue [Line Items]
Total revenue	$ 191.9	$ 175.6	$ 356.7	$ 321.8
Revenue as a percentage of total revenue	5.60%	6.20%	5.60%	6.00%
Landfill
Disaggregation of Revenue [Line Items]
Total revenue	$ 406.1	$ 371.0	$ 755.6	$ 686.8
Revenue as a percentage of total revenue	11.90%	13.20%	11.80%	12.70%
Environmental solutions
Disaggregation of Revenue [Line Items]
Total revenue	$ 294.3	$ 34.1	$ 393.6	$ 69.0
Revenue as a percentage of total revenue	8.60%	1.20%	6.20%	1.30%
Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 191.0	$ 169.2	$ 370.3	$ 318.1
Revenue as a percentage of total revenue	5.60%	6.10%	5.80%	5.90%
Recycling processing and commodity sales
Disaggregation of Revenue [Line Items]
Total revenue	$ 113.6	$ 103.0	$ 213.3	$ 190.6
Revenue as a percentage of total revenue	3.30%	3.70%	3.30%	3.50%
Other non-core
Disaggregation of Revenue [Line Items]
Total revenue	$ 77.4	$ 66.2	$ 157.0	$ 127.5
Revenue as a percentage of total revenue	2.30%	2.40%	2.50%	2.40%
Operating Segments \| Collection
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,330.4	$ 2,062.4	$ 4,507.4	$ 4,012.5
Revenue as a percentage of total revenue	68.30%	73.30%	70.60%	74.10%
Operating Segments \| Residential
Disaggregation of Revenue [Line Items]
Total revenue	$ 654.1	$ 611.6	$ 1,282.0	$ 1,204.7
Revenue as a percentage of total revenue	19.20%	21.70%	20.10%	22.20%
Operating Segments \| Small-container
Disaggregation of Revenue [Line Items]
Total revenue	$ 975.6	$ 843.2	$ 1,891.2	$ 1,653.4
Revenue as a percentage of total revenue	28.60%	30.00%	29.60%	30.50%
Operating Segments \| Large-container
Disaggregation of Revenue [Line Items]
Total revenue	$ 687.4	$ 594.6	$ 1,308.5	$ 1,129.0
Revenue as a percentage of total revenue	20.10%	21.10%	20.50%	20.90%
Operating Segments \| Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 13.3	$ 13.0	$ 25.7	$ 25.4
Revenue as a percentage of total revenue	0.40%	0.50%	0.40%	0.50%
Operating Segments \| Transfer
Disaggregation of Revenue [Line Items]
Total revenue	$ 407.8	$ 383.7	$ 770.4	$ 715.0
Operating Segments \| Landfill
Disaggregation of Revenue [Line Items]
Total revenue	699.0	654.2	1,316.1	1,219.3
Operating Segments \| Environmental solutions
Disaggregation of Revenue [Line Items]
Total revenue	308.0	37.6	416.9	76.6
Intersegment Eliminations \| Transfer
Disaggregation of Revenue [Line Items]
Total revenue	(215.9)	(208.1)	(413.7)	(393.2)
Intersegment Eliminations \| Landfill
Disaggregation of Revenue [Line Items]
Total revenue	(292.9)	(283.2)	(560.5)	(532.5)
Intersegment Eliminations \| Environmental solutions
Disaggregation of Revenue [Line Items]
Total revenue	$ (13.7)	$ (3.5)	$ (23.3)	$ (7.6)