REPUBLIC SERVICES, INC. | 2013 | FY | 3

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:
 
 
2013
 
2012
 
2011
Asset retirement obligation liabilities, beginning of year
$
1,052.4

 
$
1,037.0

 
$
1,046.5

Non-cash additions
36.5

 
33.8

 
33.9

Acquisitions and other adjustments
(0.6
)
 
(14.6
)
 
15.8

Asset retirement obligation adjustments
12.0

 
(4.6
)
 
(31.5
)
Payments
(85.6
)
 
(77.6
)
 
(105.7
)
Accretion expense
76.6

 
78.4

 
78.0

Asset retirement obligation liabilities, end of year
1,091.3

 
1,052.4

 
1,037.0

Less: current portion
(93.6
)
 
(110.4
)
 
(85.2
)
Long-term portion
$
997.7

 
$
942.0

 
$
951.8

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