v2.4.0.6

Landfill and Environmental Costs (Tables) | 12 Months Ended
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Dec. 31, 2011
Landfill and Environmental Costs [Abstract] |
Summary of landfill and environmental liabilities | A summary of our landfill and environmental liabilities as of December 31 is as follows:
|  | 2011 |  |  | 2010 |
Landfill final capping, closure and post-closure liabilities |  | $ | 1,037.0 |  |  | $ | 1,046.5 |
Remediation |  |  | 543.7 |  |  |  | 552.1 |
|  |  | 1,580.7 |  |  |  | 1,598.6 |
Less: Current portion |  |  | (184.2 | ) |  |  | (182.0 | )
Long-term portion |  | $ | 1,396.5 |  |  | $ | 1,416.6 |
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 years ended December 31:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Asset retirement obligation liabilities, beginning of year |  | $ | 1,046.5 |  |  | $ | 1,074.5 |  |  | $ | 1,040.6 |
Non-cash additions |  |  | 33.9 |  |  |  | 31.4 |  |  |  | 32.5 |
Acquisitions and other adjustments |  |  | 15.8 |  |  |  | (3.0 | ) |  |  | 72.3 |
Asset retirement obligation adjustments |  |  | (31.5 | ) |  |  | (27.9 | ) |  |  | (57.4 | )
Payments |  |  | (105.7 | ) |  |  | (111.3 | ) |  |  | (100.9 | )
Accretion expense |  |  | 78.0 |  |  |  | 80.5 |  |  |  | 88.8 |
Adjustments to liabilities related to assets held for sale |  |  | - |  |  |  | 2.3 |  |  |  | (1.4 | )
Asset retirement obligation liabilities, end of period |  |  | 1,037.0 |  |  |  | 1,046.5 |  |  |  | 1,074.5 |
Less: Current portion |  |  | (85.2 | ) |  |  | (93.9 | ) |  |  | (137.5 | )
Long-term portion |  | $ | 951.8 |  |  | $ | 952.6 |  |  | $ | 937.0 |
Summary 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, 2011 are as follows:
2012 |  | $ | 85.2 |
2013 |  |  | 111.0 |
2014 |  |  | 97.0 |
2015 |  |  | 98.7 |
2016 |  |  | 94.3 |
Thereafter |  |  | 4,628.9 |
|  | $ | 5,115.1 |
Activity in environmental remediation liabilities | The following table summarizes the activity in our environmental remediation liabilities for the years ended December 31:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Remediation liabilities, beginning of year |  | $ | 552.1 |  |  | $ | 554.1 |  |  | $ | 389.9 |
Acquisitions and other adjustments |  |  | - |  |  |  | 1.5 |  |  |  | 181.9 |
Additions charged to expense |  |  | 3.6 |  |  |  | 17.9 |  |  |  | 4.9 |
Payments |  |  | (45.0 | ) |  |  | (50.5 | ) |  |  | (56.2 | )
Accretion expense (non-cash interest expense) |  |  | 33.0 |  |  |  | 29.1 |  |  |  | 33.6 |
Remediation liabilities, end of period |  |  | 543.7 |  |  |  | 552.1 |  |  |  | 554.1 |
Less: Current portion |  |  | (99.0 | ) |  |  | (88.1 | ) |  |  | (107.9 | )
Long-term portion |  | $ | 444.7 |  |  | $ | 464.0 |  |  | $ | 446.2 |
Summary of expected undiscounted future payments for remediation costs | The expected undiscounted future payments for remediation costs as of December 31, 2011 are as follows:
2012 |  | $ | 99.0 |
2013 |  |  | 64.3 |
2014 |  |  | 45.7 |
2015 |  |  | 37.7 |
2016 |  |  | 32.6 |
Thereafter |  |  | 458.7 |
|  | $ | 738.0 |

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