Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

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SUBSEQUENT EVENTS (Details) - USD ($)
$ in Millions
Apr. 03, 2024
Mar. 18, 2024
Apr. 22, 2024
Feb. 10, 2022
Subsequent Event [Line Items]        
Authorized amount of stock repurchase       $ 1,000
6.750% 2026 Senior Secured Notes | Cleveland-Cliffs Inc.        
Subsequent Event [Line Items]        
Amount of debt extinguished   $ 640    
Subsequent Event        
Subsequent Event [Line Items]        
Authorized amount of stock repurchase     $ 1,500  
Subsequent Event | 6.750% 2026 Senior Secured Notes | Cleveland-Cliffs Inc.        
Subsequent Event [Line Items]        
Amount of debt extinguished $ 189