Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

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SUBSEQUENT EVENTS (Details) - USD ($)
$ in Millions
Apr. 14, 2023
Mar. 31, 2023
Dec. 31, 2022
Subsequent Event [Line Items]      
Aggregate principal amount   $ 4,613 $ 4,306
Subsequent Event | 6.750% 2030 Senior Notes | Cleveland-Cliffs Inc.      
Subsequent Event [Line Items]      
Aggregate principal amount $ 750    
Stated interest rate 6.75%