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Landfill and Environmental Costs (Details 4) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Environmental Remediation Obligations [Abstract]  
2013 $ 85.1
2014 60.7
2015 38.4
2016 29.6
2017 29.3
Thereafter 356.4
Total expected undiscounted future payments for remediation $ 599.5