v2.4.0.6
Landfill and Environmental Costs (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Summary of landfill and environmental liabilities        
Final capping, closure and post-closure liabilities $ 1,053.4 $ 1,052.4 $ 1,055.2 $ 1,037.0
Remediation 557.3 563.7 530.0 543.7
Total accrued landfill and environmental costs 1,610.7 1,616.1    
Less: Current portion (189.4) (195.5)    
Long-term portion $ 1,421.3 $ 1,420.6