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Business Acquisitions, Investments and Restructuring Charges (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	May 02, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
US Ecology, Inc. acquisition integration and deal costs		$ 33.5	$ 77.3	$ 0.0
Loss from unconsolidated equity method investments		94.3	165.6	188.5
Restructuring charges		33.2	27.0	$ 16.6
Restructuring expenditures		39.4	19.8
Contract Termination
Schedule of Equity Method Investments [Line Items]
Restructuring charges		9.5
Redesign Of Software Systems
Schedule of Equity Method Investments [Line Items]
Restructuring charges		23.7
Investment Tax Credit Carryforward
Schedule of Equity Method Investments [Line Items]
Income tax benefits		87.0	139.0
Other Noncurrent Assets
Schedule of Equity Method Investments [Line Items]
Capital contributions to noncontrolling equity interest		222.0	205.0
Joint Venture with Landfill Gas to Energy Developer
Schedule of Equity Method Investments [Line Items]
Equity method investments		170.0	100.0
Capital contributions to noncontrolling equity interest		68.0
Certain Limited Liability Companies
Schedule of Equity Method Investments [Line Items]
Loss from unconsolidated equity method investments		102.0	158.0
Ravago, Blue Polymers
Schedule of Equity Method Investments [Line Items]
Equity method investments		19.0	$ 10.0
Capital contributions to noncontrolling equity interest		$ 9.0
US Ecology
Schedule of Equity Method Investments [Line Items]
Business combination, consideration transferred	$ 2,200.0