Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.24.2
SUBSEQUENT EVENTS (Details) - Subsequent Event - Stelco Holdings Inc
$ / shares in Units, $ in Billions, $ in Billions
Jul. 12, 2024
USD ($)
shares
Jul. 12, 2024
CAD ($)
$ / shares
shares
Subsequent Event [Line Items]    
Price per share (in dollars per share)   $ 70.00
Shares of Cliffs common shares issued to Stelco Holdings stockholders (in shares) | shares 0.454 0.454
Expected enterprise value of acquisition $ 2.5 $ 3.4
Stelco Holdings Inc    
Subsequent Event [Line Items]    
Price per share (in dollars per share)   $ 60.00
Cleveland-Cliffs Inc.    
Subsequent Event [Line Items]    
Price per share (in dollars per share)   $ 10.00