v2.4.0.6
Landfill and Environmental Costs (Tables)
 3 Months Ended
Mar. 31, 2013
Environmental Remediation Obligations [Abstract]  
Summary of landfill and environmental liabilities
A summary of landfill and environmental liabilities as of March 31, 2013 and December 31, 2012 follows:
 
 
2013
 
2012
Final capping, closure and post-closure liabilities
$
1,053.4

 
$
1,052.4

Remediation
557.3

 
563.7

Total accrued landfill and environmental costs
1,610.7

 
1,616.1

Less: Current portion
(189.4
)
 
(195.5
)
Long-term portion
$
1,421.3

 
$
1,420.6
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 include liabilities for final capping, closure and post-closure, for the three months ended March 31:
 
 
2013
 
2012
Asset retirement obligation liabilities, beginning of year
$
1,052.4

 
$
1,037.0

Non-cash additions
8.1

 
8.2

Acquisitions/divestitures and other adjustments
—

 
(2.5
)
Asset retirement obligation adjustments
0.4

 
4.6

Payments
(26.7
)
 
(11.8
)
Accretion expense
19.2

 
19.7

Asset retirement obligation liabilities, end of period
1,053.4

 
1,055.2

Less: Current portion
(107.7
)
 
(89.0
)
Long-term portion
$
945.7

 
$
966.2
Activity in environmental remediation liabilities
The following table summarizes the activity in our environmental remediation liabilities for the three months ended March 31:
 
 
2013
 
2012
Remediation liabilities, beginning of year
$
563.7

 
$
543.7

Remediation adjustments
5.8

 
(8.5
)
Payments
(18.9
)
 
(13.6
)
Accretion expense (non-cash interest expense)
6.7

 
8.4

Remediation liabilities, end of period
557.3

 
530.0

Less: Current portion
(81.7
)
 
(93.6
)
Long-term portion
$
475.6

 
$
436.4