Quarterly report pursuant to Section 13 or 15(d)

SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Cash Flow Information) (Details)

v3.20.1
SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Cash Flow Information) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Apr. 15, 2020
Mar. 31, 2020
Mar. 31, 2019
Mar. 13, 2020
Other Significant Noncash Transactions [Line Items]        
Capital additions   $ 157.7 $ 129.3  
Non-cash accruals   (10.3) (11.5)  
Right-of-use assets obtained in exchange for new finance lease liabilities1 [1]   29.9 15.1  
Grants   0.0 (8.4)  
Cash paid for capital expenditures including deposits   138.1 134.1  
Taxes paid on income   0.1 0.1  
Income tax refunds   (60.4) 0.0  
Interest paid on debt obligations net of capitalized interest [2]   29.7 39.2  
Capitalized interest [2]   9.7 4.0  
Fair value of Cliffs equity issued for business combination       $ 617.6
Dividends Declared, Common Stock   $ 24.0 $ 14.5  
Common Stock, Dividends, Per Share, Declared   $ 0.06 $ 0.05  
Share-based Payment Arrangement [Member]        
Other Significant Noncash Transactions [Line Items]        
Fair value of Cliffs equity issued for business combination     $ 0.0 4.3
Common Stock [Member]        
Other Significant Noncash Transactions [Line Items]        
Fair value of Cliffs equity issued for business combination     $ 0.0 $ 617.6
Subsequent Event [Member]        
Other Significant Noncash Transactions [Line Items]        
Dividends, Common Stock, Cash $ 23.9      
[1]
1 Does not include right-of-use assets obtained in the Merger of $5.3 million for the three months ended March 31, 2020.
[2]
1 Capitalized interest was $9.7 million and $4.0 million for the three months ended March 31, 2020 and 2019, respectively.