Annual report pursuant to Section 13 and 15(d)

CAPITAL STOCK - Narrative (Details)

v3.22.4
CAPITAL STOCK - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 01, 2021
Mar. 11, 2021
Dec. 09, 2020
Sep. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Feb. 10, 2022
Apr. 29, 2021
Mar. 31, 2021
Feb. 11, 2021
Class of Stock [Line Items]                      
Authorized amount of stock repurchase               $ 1,000      
Common share repurchases         $ 240            
Redemption of debt         1,318            
1.500% 2025 Convertible Senior Notes redemption         $ (25) $ (5)          
Common shares, issued (in shares)         531,051,530 506,832,537         20,000,000
Common shares, sold (in shares)                     40,000,000
Common stock, shares issued, price per share (in usd per share)                     $ 16.12
Redeemable preferred stock, issued (in shares)           583,273          
Redeemable preferred stock, outstanding (in shares)           583,273          
Common shares, authorized (in shares)         1,200,000,000 1,200,000,000     1,200,000,000 600,000,000  
Common Stock                      
Class of Stock [Line Items]                      
Common stock repurchases (in shares)         12,500,000            
1.500% 2025 Convertible Senior Notes redemption (in shares)         24,000,000            
Common Shares in Treasury                      
Class of Stock [Line Items]                      
Common share repurchases         $ 240            
1.500% 2025 Convertible Senior Notes                      
Class of Stock [Line Items]                      
Redemption of debt $ 294       294            
Repayments of debt 294                    
1.500% 2025 Convertible Senior Notes redemption $ 499       499            
9.875% 2025 Senior Secured Notes                      
Class of Stock [Line Items]                      
Redemption of debt   $ 322     $ 607            
ArcelorMittal                      
Class of Stock [Line Items]                      
Common shares, sold (in shares)                     40,000,000
Cleveland-Cliffs Inc. | 1.500% 2025 Convertible Senior Notes                      
Class of Stock [Line Items]                      
Stated interest rate         1.50%            
Cleveland-Cliffs Inc. | 9.875% 2025 Senior Secured Notes                      
Class of Stock [Line Items]                      
Stated interest rate         9.875%            
ArcelorMittal USA | Common Stock                      
Class of Stock [Line Items]                      
Acquisition (in shares)             78,000,000        
Common Stock                      
Class of Stock [Line Items]                      
1.500% 2025 Convertible Senior Notes redemption (in shares) 24,000,000                    
Common Stock | ArcelorMittal USA                      
Class of Stock [Line Items]                      
Acquisition (in shares)     78,186,671                
Series B Preferred Stock                      
Class of Stock [Line Items]                      
Stock redeemed during period (in shares)       583,273              
Stock redeemed during period       $ 1,300              
Preferred stock authorized (in shares)         4,000,000            
Preferred stock issued (in shares)         0            
Preferred stock outstanding (in shares)         0            
Series B Preferred Stock | ArcelorMittal USA                      
Class of Stock [Line Items]                      
Acquisition (in shares)     583,273                
Series A Preferred Stock                      
Class of Stock [Line Items]                      
Preferred stock authorized (in shares)         3,000,000            
Preferred stock issued (in shares)         0            
Preferred stock outstanding (in shares)         0