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Restructuring Actions (Details) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]  
Restructuring reserve, beginning balance $ 0.9
Restructuring reserve, period expense 24.6
Restructuring Reserve, settled with cash (24.5)
Restructuring reserve, accrual adjustment (0.4)
Restructuring reserve, ending balance 0.6
One-time Termination Benefits [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring reserve, beginning balance 0.3
Restructuring reserve, period expense 1.7
Restructuring Reserve, settled with cash (1.5)
Restructuring reserve, accrual adjustment (0.4)
Restructuring reserve, ending balance 0.1
Environmental Restoration Costs [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring reserve, beginning balance 0.6
Restructuring reserve, period expense 0
Restructuring Reserve, settled with cash (0.1)
Restructuring reserve, accrual adjustment 0
Restructuring reserve, ending balance 0.5
Other Restructuring Actions [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring reserve, beginning balance 0
Restructuring reserve, period expense 22.9
Restructuring Reserve, settled with cash (22.9)
Restructuring reserve, accrual adjustment 0
Restructuring reserve, ending balance $ 0