v2.4.0.6
Landfill and Environmental Costs (Details 2) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Activity in environmental remediation liabilities    
Remediation liabilities, beginning of year $ 563.7 $ 543.7
Remediation adjustments 5.8 (8.5)
Payments (18.9) (13.6)
Accretion expense (non-cash interest expense) 6.7 8.4
Remediation liabilities, end of period 557.3 530.0
Less: Current portion (81.7) (93.6)
Long-term portion $ 475.6 $ 436.4