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