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Landfill and Environmental Costs (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Environmental Remediation Obligations [Abstract]        
Landfill final capping, closure and post-closure liabilities $ 1,052.4 $ 1,037.0 $ 1,046.5 $ 1,074.5
Remediation 563.7 543.7 552.1 554.1
Total accrued landfill and environmental costs 1,616.1 1,580.7    
Less: Current portion (195.5) (184.2)    
Long-term portion $ 1,420.6 $ 1,396.5