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Recent Accounting Pronouncements (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jan. 01, 2019
Jan. 01, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]              
Net sales $ 1,935.0 $ 1,454.0 $ 5,386.0 $ 4,395.0      
Cost of materials and other 1,561.0 $ 1,133.0 4,370.0 $ 3,582.0      
Assets              
Accounts Receivable 214.0   214.0       $ 179.0
Liabilities              
Deferred Revenue 32.0   32.0        
CVR Partners              
Assets              
Accounts Receivable           $ 31.0  
Liabilities              
Deferred Revenue 32.0   32.0     34.0 $ 34.0
ASU 2016-02 | Forecast | Minimum              
Liabilities              
Operating lease right of use asset estimate         $ 50.0    
Lease liability estimate         50.0    
ASU 2016-02 | Forecast | Maximum              
Liabilities              
Operating lease right of use asset estimate         100.0    
Lease liability estimate         $ 100.0    
Balances Without Adoption of ASC 606              
Assets              
Accounts Receivable 207.0   207.0        
Liabilities              
Deferred Revenue 25.0   25.0        
Effect of Change | ASU 2014-09              
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]              
Net sales 1.0   1.0        
Cost of materials and other 1.0   1.0        
Assets              
Accounts Receivable 7.0   7.0     21.0  
Liabilities              
Deferred Revenue $ 7.0   $ 7.0     $ 21.0