v3.25.4
SCOPE OF CONSOLIDATION - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Dec. 12, 2025
Dec. 03, 2025
Jun. 18, 2025
May 05, 2025
Apr. 01, 2025
May 31, 2024
May 31, 2023
Mar. 10, 2023
Mar. 09, 2023
Calvert1                  
Disclosure of detailed information about business combination [line items]                  
Current assets     $ 1,985            
Property, plant and equipment     2,727            
Total assets     4,712            
Deferred tax liabilities     137            
Other liabilities     1,631            
Total liabilities     1,768            
Net assets acquired     2,944            
Consideration paid, net of cash acquired (received)     (263)            
Settlement of preexisting relationships     574            
Fair value of previously held interest     897            
Goodwill/(bargain purchase gain)     (1,736)            
Calvert1 | Cash, repayment of debt                  
Disclosure of detailed information about business combination [line items]                  
Cash transferred     $ 638            
Tekno                  
Disclosure of detailed information about business combination [line items]                  
Current assets   $ 48              
Property, plant and equipment   36              
Other non-current assets   7              
Total assets   91              
Other liabilities   42              
Total liabilities   42              
Net assets acquired   49              
Consideration paid, net of cash acquired (received)   104              
Deferred consideration   13              
Fair value of previously held interest   23              
Goodwill/(bargain purchase gain)   $ 91              
Atlas                  
Disclosure of detailed information about business combination [line items]                  
Current assets $ 2                
Property, plant and equipment 193                
Other non-current assets 1                
Total assets 196                
Other liabilities 180                
Total liabilities 180                
Net assets acquired 16                
Consideration paid, net of cash acquired (received) 23                
Deferred consideration 9                
Fair value of previously held interest 25                
Debt assumed 0                
Goodwill/(bargain purchase gain) $ 41                
AMTBA                  
Disclosure of detailed information about business combination [line items]                  
Current assets         $ 104        
Property, plant and equipment         241        
Intangible assets         70        
Other non-current assets         12        
Total assets         427        
Deferred tax liabilities         42        
Other liabilities         199        
Total liabilities         241        
Net assets acquired         186        
Consideration paid, net of cash acquired (received)         5        
Settlement of outstanding receivable         13        
Fair value of previously held interest         245        
Non-controlling interests         20        
Goodwill/(bargain purchase gain)         $ 97        
Tuper                  
Disclosure of detailed information about business combination [line items]                  
Current assets       $ 99          
Property, plant and equipment       142          
Intangible assets       38          
Other non-current assets       23          
Total assets       302          
Other liabilities       177          
Total liabilities       177          
Net assets acquired       125          
Consideration paid, net of cash acquired (received)       84          
Settlement of preexisting relationships       52          
Settlement of outstanding receivable       9          
Fair value of previously held interest       149          
Goodwill/(bargain purchase gain)       169          
Cash transferred       $ 84          
Italpannelli                  
Disclosure of detailed information about business combination [line items]                  
Current assets             $ 75    
Property, plant and equipment             54    
Intangible assets             58    
Total assets             187    
Deferred tax liabilities             19    
Other liabilities             52    
Total liabilities             71    
Net assets acquired             116    
Consideration paid, net of cash acquired (received)             201    
Goodwill/(bargain purchase gain)           $ 85 $ 85    
ArcelorMittal Pecém                  
Disclosure of detailed information about business combination [line items]                  
Current assets                 $ 3,123
Property, plant and equipment                 1,824
Intangible assets                 100
Other non-current assets                 138
Total assets                 5,185
Other liabilities                 3,156
Total liabilities                 3,156
Net assets acquired                 2,029
Consideration paid, net of cash acquired (received)                 2,193
Goodwill/(bargain purchase gain)                 $ 164
Sustainable Solutions acquisitions                  
Disclosure of detailed information about business combination [line items]                  
Current assets               $ 25  
Property, plant and equipment               75  
Intangible assets               32  
Other non-current assets               8  
Total assets               140  
Deferred tax liabilities               14  
Other liabilities               46  
Total liabilities               60  
Net assets acquired               80  
Consideration paid, net of cash acquired (received)               152  
Debt assumed               15  
Goodwill/(bargain purchase gain)               $ 57