Annual report pursuant to Section 13 and 15(d)

STOCK COMPENSATION PLANS - Restricted Stock (Details)

v3.20.4
STOCK COMPENSATION PLANS - Restricted Stock (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Outstanding at beginning of year 2,147,183 4,694,360 4,403,112  
Outstanding shares, weighted average grant date fair value $ 7.12 $ 9.10 $ 4.18 $ 3.64
Granted shares 1,160,928 572,104 685,599  
Granted Shares Weighted Average Fair Value $ 4.87 $ 11.24 $ 7.53  
Distributed (1,101,115) (3,058,307) (254,196)  
Distributed shares, weighted average grant date fair value $ 8.58 $ 1.95 $ 3.30  
Forfeited/canceled shares (63,413) (60,974) (140,155)  
Forfeited/canceled shares, weighted average grant date fair value $ 7.31 $ 9.31 $ 5.17  
Outstanding at end of year 2,143,583 2,147,183 4,694,360  
Performance/vesting period 3 years      
Restricted Stock Units (RSUs) [Member] | AK Steel [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Granted shares 300,000      
Distributed shares, weighted average grant date fair value $ 4.87      
Restricted Stock [Member] | AK Steel [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Granted shares 200,000