XML 44 R49.htm IDEA: XBRL DOCUMENT v3.20.1
Landfill and Environmental Costs - Environmental Remediation Liability (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Activity in environmental remediation liabilities    
Environmental remediation liabilities, beginning of year $ 500.2 $ 540.2
Net adjustments charged to expense (0.4) (10.5)
Payments (17.2) (7.2)
Accretion expense (non-cash interest expense) 4.6 4.8
Acquisitions, net of divestitures and other adjustments 1.5 0.0
Environmental remediation liabilities, end of period 488.7 527.3
Less: current portion (56.7) (58.6)
Long-term portion $ 432.0 $ 468.7