Revenue (Revenue by Service Line) (Details) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Disaggregation of Revenue [Line Items]
Revenue	$ 14,964.5	$ 13,511.3	$ 11,295.0
Revenue as a percentage of total revenue	1.000	1.000	1.000
Transfer
Disaggregation of Revenue [Line Items]
Revenue	$ 765.4	$ 724.7	$ 675.6
Revenue as a percentage of total revenue	0.051	0.054	0.060
Landfill
Disaggregation of Revenue [Line Items]
Revenue	$ 1,679.4	$ 1,549.8	$ 1,423.8
Revenue as a percentage of total revenue	0.112	0.115	0.126
Environmental Solutions Service Line
Disaggregation of Revenue [Line Items]
Revenue	$ 1,624.9	$ 1,208.2	$ 222.9
Revenue as a percentage of total revenue	0.109	0.089	0.020
Recycling processing and commodity sales
Disaggregation of Revenue [Line Items]
Revenue	$ 312.3	$ 359.1	$ 420.5
Revenue as a percentage of total revenue	0.021	0.027	0.037
Other non-core
Disaggregation of Revenue [Line Items]
Revenue	$ 329.6	$ 326.2	$ 274.0
Revenue as a percentage of total revenue	0.022	0.024	0.024
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 641.9	$ 685.3	$ 694.5
Revenue as a percentage of total revenue	0.043	0.051	0.061
Operating Segments \| Residential
Disaggregation of Revenue [Line Items]
Revenue	$ 2,822.7	$ 2,642.6	$ 2,452.8
Revenue as a percentage of total revenue	0.189	0.195	0.217
Operating Segments \| Small-container
Disaggregation of Revenue [Line Items]
Revenue	$ 4,438.4	$ 3,945.7	$ 3,417.7
Revenue as a percentage of total revenue	0.297	0.292	0.303
Operating Segments \| Large-container
Disaggregation of Revenue [Line Items]
Revenue	$ 2,922.4	$ 2,701.1	$ 2,355.6
Revenue as a percentage of total revenue	0.195	0.200	0.208
Operating Segments \| Other
Disaggregation of Revenue [Line Items]
Revenue	$ 69.4	$ 53.9	$ 52.1
Revenue as a percentage of total revenue	0.004	0.004	0.005
Operating Segments \| Collection Service Line
Disaggregation of Revenue [Line Items]
Revenue	$ 10,252.9	$ 9,343.3	$ 8,278.2
Revenue as a percentage of total revenue	0.685	0.691	0.733
Operating Segments \| Transfer
Disaggregation of Revenue [Line Items]
Revenue	$ 1,699.1	$ 1,574.5	$ 1,490.0
Operating Segments \| Landfill
Disaggregation of Revenue [Line Items]
Revenue	2,885.4	2,681.7	2,516.6
Operating Segments \| Environmental Solutions Service Line
Disaggregation of Revenue [Line Items]
Revenue	1,701.4	1,262.1	242.4
Intersegment Eliminations \| Transfer
Disaggregation of Revenue [Line Items]
Revenue	(933.7)	(849.8)	(814.4)
Intersegment Eliminations \| Landfill
Disaggregation of Revenue [Line Items]
Revenue	(1,206.0)	(1,131.9)	(1,092.8)
Intersegment Eliminations \| Environmental Solutions Service Line
Disaggregation of Revenue [Line Items]
Revenue	$ (76.5)	$ (53.9)	$ (19.5)