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Commitments and Contingencies (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2005
USD ($)
Jun. 30, 2018
USD ($)
claim
case
Jun. 30, 2018
USD ($)
claim
defendant
case
Dec. 31, 2017
USD ($)
Apr. 08, 2016
USD ($)
Commitments and Contingencies          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   35.00% 35.00%    
Accrual for Environmental Loss Contingencies   $ 7.0 $ 7.0    
Lima Refinery Litigation          
Commitments and Contingencies          
Loss contingency damages sought         $ 106.0
Lima Refinery property damages         $ 289.0
Brazilian Tax Disputes - Jan 2004 through May 2005 | Sao Paulo State Revenue Authority          
Commitments and Contingencies          
Damages sought - principal     2.0    
Damages sought - interest, penalties and fees   2.0 21.0    
Amount of damages sought   9.0      
Brazilian Tax Disputes - Jan 2002 through Dec 2003 | Sao Paulo State Revenue Authority          
Commitments and Contingencies          
Damages sought - principal $ 1.5        
Damages sought - interest, penalties and fees 5.0        
Amount of damages sought $ 6.5        
Brazilian Labor Claims          
Commitments and Contingencies          
Loss contingency reserves   $ 8.7 $ 8.7 $ 9.6  
Other          
Commitments and Contingencies          
Approximate number of defendants that includes the company named in legal actions | defendant     90    
Number of pending claims | claim   17,286 17,286    
Number of claims dismissed to date by stipulation or summary judgment prior to trial | case     27,999    
Other | Active or In Extremis docket          
Commitments and Contingencies          
Number of pending claims | claim   33 33    
Other | Minimum          
Commitments and Contingencies          
Amount of damages sought     $ 20.0    
Other | Maximum          
Commitments and Contingencies          
Amount of damages sought     $ 25.0    
Other | New York County as managed by the New York Supreme Court          
Commitments and Contingencies          
Number of pending claims | case   16,737 16,737    
Other | New York County as managed by the New York Supreme Court | Pending And Future Litigation, Deferred Or Inactive Docket          
Commitments and Contingencies          
Number of pending claims | claim   16,704 16,704    
Other | New York State Supreme Court, Counties Excluding New York County          
Commitments and Contingencies          
Number of pending claims | case   111 111    
Other | Courts Located In States Other Than New York          
Commitments and Contingencies          
Number of pending claims | case   438 438    
Consolidated Revenues | Subsidiary Concentration Risk          
Commitments and Contingencies          
Concentration risk, percentage     2.00%