Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Adoption of New Standard) (Details)

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Adoption of New Standard) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Cost of Goods and Services Sold $ (538.2) $ (467.9) $ (1,328.3) $ (1,147.2)
Selling, General and Administrative Expense (24.6) (31.1) (77.8) (81.8)
Miscellaneous - net (5.9) (19.6) 3.0 (16.9)
Operating Income (Loss) 129.7 34.7 326.2 109.1
Other non-operating income 0.8 0.1 2.3 0.4
NET INCOME (LOSS) $ 52.9 $ (27.8) 53.2 $ 118.5
Estimated post adjustment [Member]        
Cost of Goods and Services Sold     (1,327.0)  
Selling, General and Administrative Expense     (83.6)  
Miscellaneous - net     1.8  
Operating Income (Loss)     320.5  
Other non-operating income     8.0  
NET INCOME (LOSS)     53.2  
Estimated Adjustment [Member]        
Cost of Goods and Services Sold     1.3  
Selling, General and Administrative Expense     (5.8)  
Miscellaneous - net     (1.2)  
Operating Income (Loss)     (5.7)  
Other non-operating income     5.7  
NET INCOME (LOSS)     $ 0.0