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ACQUISITION OF BUSINESSES - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 03, 2025
Jul. 31, 2025
Apr. 29, 2025
Dec. 31, 2025
Jan. 01, 2026
Disclosure of detailed information about business combination [line items]          
Property, plant and equipment         $ 1,100
Business acquisition, proforma revenue       $ 1,700  
Business acquisition, proforma income       $ 100  
U.S. bulk fiber network          
Disclosure of detailed information about business combination [line items]          
Total consideration $ 808        
Percentage of voting equity interests acquired 20.00%        
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination $ 14        
Property, plant and equipment 2,657        
Intangible assets $ 1,673        
Useful life measured as period of time, intangible assets other than goodwill 25 years        
Cash $ 808        
U.S. bulk fiber network | Hotwire Consortium          
Disclosure of detailed information about business combination [line items]          
Total consideration $ 3,900        
U.S. Refined Products Pipeline System          
Disclosure of detailed information about business combination [line items]          
Total consideration   $ 920      
Percentage of voting equity interests acquired   15.00%      
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination   $ 43      
Property, plant and equipment   8,898      
Equity funded consideration   500      
Cash   920      
U.S. Refined Products Pipeline System | Colonial Consortium          
Disclosure of detailed information about business combination [line items]          
Total consideration   6,200      
Equity funded consideration   $ 3,400      
Brazilian electricity transmission operation          
Disclosure of detailed information about business combination [line items]          
Total consideration     $ 179    
Percentage of voting equity interests acquired     15.00%    
Intangible assets     $ 1,330    
Cash     $ 45    
Proportion of ownership interest in subsidiary     31.00%    
Brazilian electricity transmission operation | Mantiqueira Consortium          
Disclosure of detailed information about business combination [line items]          
Total consideration     $ 145    
Proportion of ownership interest in subsidiary     100.00%