Annual report pursuant to Section 13 and 15(d)

GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Goodwill (Details)

betfred games-free to play_ACQUISITIONS - Intangible v3.20.4
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12 Months Ended
Dec. 31, 2020
Mar. 13, 2020
Dec. 31, 2019
Goodwill [Line Items]      
Goodwill $ 1,406   $ 2
ArcelorMittal USA [Member]      
Goodwill [Line Items]      
Goodwill 1,230    
AK Steel [Member]      
Goodwill [Line Items]      
Goodwill 174 $ 141  
betfred gamesSteelmaking [Member]      
Goodwill [Line Items]      
Goodwill 1,232   2
betfred gamesSteelmaking [Member] | ArcelorMittal USA [Member]      
Goodwill [Line Items]      
Goodwill, Period Increase (Decrease) 1,230    
Other businesses      
Goodwill [Line Items]      
Goodwill 174   $ 0
Other businesses | AK Steel [Member]      
Goodwill [Line Items]      
Goodwill, Period Increase (Decrease) $ 174