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CONTINGENCIES (Details) - Great Lakes v. Essar Steel Minnesota LLC, et al. - Great Lakes - USD ($)
$ in Millions
1 Months Ended
Oct. 29, 2009
May 31, 2017
Apr. 30, 2017
Sep. 30, 2015
Contingencies        
Judgement awarded     $ 31.5  
Amount released into bankruptcy estates   $ 1.2    
Essar        
Contingencies        
Recovery sought $ 33.0      
Judgement awarded   $ 1.2   $ 32.9