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Asset Retirement Obligation (Tables)
 12 Months Ended
Dec. 31, 2017
ASSET RETIREMENT OBLIGATIONS [Abstract]  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
The activity in our asset retirement obligation liability for 2017 and 2016 is summarized in the following table. These are included in “Other long-term liabilities” in the Consolidated Balance Sheets. Our asset retirement obligation reflects the estimated present value of its obligations for capping, closure and post closure costs with respect to landfills we own or operate and other on-going environmental monitoring costs.
 
Dollar amounts in millions
Year ended December 31,
2017
 
2016
Beginning balance
$
10.2

 
$
10.0

Accretion expense
0.8

 
0.8

Adjusted to expense during the year
—

 
(0.3
)
Payments made
(0.3
)
 
(0.4
)
Translation
0.1

 
0.1

Ending balance
$
10.8

 
$
10.2