v3.24.0.1
Landfill and Environmental Costs (Tables)
 12 Months Ended
Dec. 31, 2023
Environmental Remediation Obligations [Abstract]  
Schedule of landfill and environmental liabilities
A summary of our accrued landfill and environmental liabilities as of December 31 follows:
20232022
Landfill final capping, closure and post-closure liabilities$1,937.2 $1,786.4 
Environmental remediation485.4 487.5 
Total accrued landfill and environmental costs2,422.6 2,273.9 
Less: current portion(141.6)(132.6)
Long-term portion$2,281.0 $2,141.3 
Schedule of activity in asset retirement obligation liabilities, which includes liabilities for final capping, closure and post-closure
The following table summarizes the activity in our asset retirement obligation liabilities, which includes liabilities for final capping, closure and post-closure, for the years ended December 31:
202320222021
Asset retirement obligation liabilities, beginning of year$1,786.4 $1,507.3 $1,346.4 
Non-cash additions61.4 60.1 47.2 
Acquisitions, net of divestitures and other adjustments12.3 173.5 32.1 
Asset retirement obligation adjustments40.1 20.0 58.5 
Payments(60.8)(64.6)(59.6)
Accretion expense97.9 89.6 82.7 
Foreign currency translation(0.1)0.5 — 
Asset retirement obligation liabilities, end of year1,937.2 1,786.4 1,507.3 
Less: Current portion(72.4)(75.2)(68.4)
Long-term portion$1,864.8 $1,711.2 $1,438.9 
Schedule of expected future payments for final capping, closure, and post-closure
The expected future payments for final capping, closure and post-closure as of December 31, 2023 follows: 
2024$72.4 
202596.5 
202691.9 
2027116.7 
2028120.9 
Thereafter7,020.0 
$7,518.4 
Schedule of activity in environmental remediation liabilities
The following table summarizes the activity in our environmental remediation liabilities for the years ended December 31:
202320222021
Environmental remediation liabilities, beginning of year$487.5 $454.9 $462.8 
Net additions charged to expense2.0 2.9 0.5 
Payments(54.9)(54.7)(57.1)
Accretion expense (non-cash interest expense)18.2 17.3 17.1 
Acquisitions, net of divestitures and other adjustments32.6 67.1 31.6 
Environmental remediation liabilities, end of year485.4 487.5 454.9 
Less: current portion(69.2)(57.4)(56.1)
Long-term portion$416.2 $430.1 $398.8 
Schedule of expected undiscounted future payments for remediation costs
The expected undiscounted future payments for remediation costs as of December 31, 2023 follows:
2024$69.2 
202565.3 
202654.7 
202742.9 
202829.6 
Thereafter281.0 
$542.7