Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING (Narrative) (Details)

v3.19.2
SEGMENT REPORTING (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
unit
Jun. 30, 2018
USD ($)
Segment Reporting Information [Line Items]        
Number of Reporting Units | unit     2  
Revenues $ 743.2 $ 714.3 $ 900.2 $ 894.3
SALES MARGIN 263.0 284.5 293.9 346.0
Mining and Pelletizing [Member]        
Segment Reporting Information [Line Items]        
Revenues 743.2 714.3 900.2 894.3
SALES MARGIN $ 263.0 $ 284.5 $ 293.9 $ 346.0