Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Adoption of New Accounting Standard) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
COST OF GOODS SOLD AND OPERATING EXPENSES $ (1,828.5) $ (1,719.7) $ (1,776.8)
Selling, general and administrative expenses (105.8) (117.8) (110.0)
Miscellaneous - net 27.7 (30.7) 24.8
OPERATING INCOME (LOSS) 423.6 240.8 151.3
Other non-operating income (expense) 3.2 0.4 (2.6)
Net income (loss) 363.1 $ 199.3 $ (748.4)
Estimated Adjustment [Member]      
COST OF GOODS SOLD AND OPERATING EXPENSES 2.4    
Selling, general and administrative expenses (7.7)    
Miscellaneous - net (1.7)    
OPERATING INCOME (LOSS) (7.0)    
Other non-operating income (expense) 7.0    
Net income (loss) 0.0    
Estimated post adjustment [Member]      
COST OF GOODS SOLD AND OPERATING EXPENSES (1,826.1)    
Selling, general and administrative expenses (113.5)    
Miscellaneous - net 26.0    
OPERATING INCOME (LOSS) 416.6    
Other non-operating income (expense) 10.2    
Net income (loss) $ 363.1