v3.10.0.1

Landfill and Environmental Costs - Accrued Landfill and Environmental Costs (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Environmental Remediation Obligations [Abstract]
Landfill final capping, closure and post-closure liabilities	$ 1,282.3	$ 1,257.7	$ 1,233.5	$ 1,224.6
Environmental remediation liabilities	555.4	564.0	$ 583.6	$ 602.9
Total accrued landfill and environmental costs	1,837.7	1,821.7
Less: current portion	(150.5)	(135.2)
Long-term portion	$ 1,687.2	$ 1,686.5

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Landfill and environmental liabilities.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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The amount of estimated costs accrued as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility (such as a landfill or waste treatment facility). Represents the portion that will be paid within one year or the normal operating cycle, if longer.

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The estimated amount of costs required as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility, which will be paid after one year or beyond the normal operating cycle, if longer.

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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