v3.5.0.2
Landfill and Environmental Costs - Environmental Remediation Liability (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Activity in environmental remediation liabilities    
Environmental remediation liabilities, beginning of year $ 646.1 $ 697.5
Net additions charged to expense 0.3 (1.3)
Payments (50.7) (50.1)
Accretion expense (non-cash interest expense) 17.6 18.7
Acquisitions and other adjustments 1.8 2.8
Environmental remediation liabilities, end of period 615.1 667.6
Less: current portion (82.7) (76.1)
Long-term portion $ 532.4 $ 591.5