XML 40 R29.htm IDEA: XBRL DOCUMENT v3.24.3
Landfill and Environmental Costs (Tables)
9 Months Ended
Sep. 30, 2024
Environmental Remediation Obligations [Abstract]  
Schedule of accrued landfill and environmental costs
A summary of accrued landfill and environmental liabilities as of September 30, 2024 and December 31, 2023 follows:
20242023
Landfill final capping, closure and post-closure liabilities$2,034.0 $1,937.2 
Environmental remediation454.0 485.4 
Total accrued landfill and environmental costs2,488.0 2,422.6 
Less: current portion(140.9)(141.6)
Long-term portion$2,347.1 $2,281.0 
Schedule of final capping, closure and post-closure costs
The following table summarizes the activity in our asset retirement obligation liabilities, which includes liabilities for final capping, closure and post-closure, for the nine months ended September 30, 2024 and 2023:
20242023
Asset retirement obligation liabilities, beginning of year$1,937.2 $1,786.4 
Non-cash additions45.1 46.4 
Acquisitions, net of divestitures and other adjustments4.1 11.8 
Asset retirement obligation adjustments2.8 (9.6)
Payments(35.3)(40.5)
Accretion expense80.1 73.2 
Asset retirement obligation liabilities, end of period2,034.0 1,867.7 
Less: current portion(77.8)(79.1)
Long-term portion$1,956.2 $1,788.6 
Summary of activity in environmental remediation liabilities
The following table summarizes the activity in our environmental remediation liabilities for the nine months ended September 30, 2024 and 2023:
20242023
Environmental remediation liabilities, beginning of year$485.4 $487.5 
Payments(44.9)(31.4)
Accretion expense (non-cash interest expense)12.7 13.5 
Acquisitions, net of divestitures and other adjustments0.8 32.4 
Environmental remediation liabilities, end of period454.0 502.0 
Less: current portion(63.1)(65.0)
Long-term portion$390.9 $437.0