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Environmental Obligations (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Dec. 31, 2016
Accrual for Environmental Loss Contingencies [Roll Forward]        
Environmental reserves, long-term     $ (293.9) $ (306.4)
Environmental loss contingencies, net of expected recoveries, in excess of accrual $ 240.0      
Recorded Recoveries [Roll Forward]        
Environmental charges, net 2.3 $ 6.6    
Environmental provision, net 6.1 10.8    
Continuing Operations        
Recorded Recoveries [Roll Forward]        
Environmental charges, net [1] 2.3 6.6    
Discontinued Operations        
Recorded Recoveries [Roll Forward]        
Environmental charges, net [2] 3.8 4.2    
Other Liabilities        
Accrual for Environmental Loss Contingencies [Roll Forward]        
Environmental remediation provision, net [3] 6.1 12.6    
Other Assets        
Accrual for Environmental Loss Contingencies [Roll Forward]        
Environmental remediation provision, net [4] 0.0 $ (1.8)    
Recorded Recoveries [Roll Forward]        
Environmental Recoveries, beginning 27.2      
Increase in Recoveries 0.0      
Cash Received (1.0)      
Environmental Recoveries, ending 26.2      
Gross        
Accrual for Environmental Loss Contingencies [Roll Forward]        
Total environmental reserves at December 31, 2016 (378.1)      
Provision/(benefit) 6.1      
(Spending)/recoveries (15.7)      
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Currency Translation 1.3      
Net change (8.3)      
Total environmental reserves at March 31, 2017 (369.8)      
Environmental reserves, current [5]     (65.3)  
Environmental reserves, long-term [6]     (304.5)  
Total environmental reserves, net of recoveries at end of period (378.1)   (369.8) (378.1)
Recoveries        
Accrual for Environmental Loss Contingencies [Roll Forward]        
Total environmental reserves at December 31, 2016 [7] (11.4)      
Provision/(benefit) [7] 0.0      
(Spending)/recoveries [7] 0.0      
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Currency Translation [7] 0.0      
Net change [7] 0.0      
Total environmental reserves at March 31, 2017 [7] (11.4)      
Environmental reserves, current [5],[7]     (0.8)  
Environmental reserves, long-term [6],[7]     (10.6)  
Total environmental reserves, net of recoveries at end of period [7] (11.4)   (11.4) (11.4)
Net        
Accrual for Environmental Loss Contingencies [Roll Forward]        
Total environmental reserves at December 31, 2016 (366.7)      
Provision/(benefit) 6.1      
(Spending)/recoveries (15.7)      
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Currency Translation 1.3      
Net change (8.3)      
Total environmental reserves at March 31, 2017 (358.4)      
Environmental reserves, current [5]     (64.5)  
Environmental reserves, long-term [6]     (293.9)  
Total environmental reserves, net of recoveries at end of period $ (366.7)   $ (358.4) $ (366.7)
[1] Recorded as a component of “Restructuring and other charges (income)” on the condensed consolidated statements of income (loss). See Note 8. Environmental obligations for continuing operations primarily represent obligations at shut down or abandoned facilities within businesses that do not meet the criteria for presentation as discontinued operations.
[2] Recorded as a component of “Discontinued operations, net of income taxes" on the condensed consolidated statements of income (loss). See Note 10.
[3] See above roll forward of our total environmental reserves as presented on the condensed consolidated balance sheets.
[4] See above roll forward of our total environmental recoveries as presented on the condensed consolidated balance sheets.
[5] These amounts are included within "Accrued and other liabilities" on the condensed consolidated balance sheets.
[6] These amounts are included in "Environmental liabilities, continuing and discontinued" on the condensed consolidated balance sheets.
[7] These recorded recoveries represent probable realization of claims against U.S. government agencies and are recorded as an offset to our environmental reserves in the condensed consolidated balance sheets.