Quarterly report pursuant to Section 13 or 15(d)

ACQUISITION OF AK STEEL (Pro Forma Information Tables) (Details)

v3.20.1
ACQUISITION OF AK STEEL (Pro Forma Information Tables) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2020
Mar. 31, 2020
Mar. 31, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Business Acquisition, Pro Forma Revenue   $ 1,526.4 $ 1,787.3
Business Acquisition, Pro Forma Net Income (Loss)   (17.4) (79.7)
Revenues [1]   359.1 157.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   $ (48.6) (22.1)
AK Steel Holding Corporation [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Revenues $ 217.5    
Business Acquisition, Pro Forma Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   24.30%  
Business Acquisition, Pro Forma Income Tax Expense (Benefit)   $ 11.6 18.3
Fair Value Adjustment to Inventory [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   23.2 84.8
Acquisition-related Costs [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   26.6  
Other Adjustments [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   13.1  
Other Adjustments [Member] | AK Steel Holding Corporation [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest     4.2
Intersegment Eliminations [Member]      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Revenues   $ 67.8 $ 67.4
[1]
1 Includes Realization of deferred revenue of $34.6 million for the three months ended March 31, 2020.