v3.26.3
Intangible assets (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]        
Balance at December 31, 2024 $ 2,523 $ 2,255    
Cost 4,534 3,976 $ 4,140 $ 3,433
Accumulated amortization and impairment (1,802) (1,544) (1,617) (1,178)
Addition 132 113    
Capitalized borrowing costs 10 5    
Write-offs (1) (1)    
Transfers 4 2    
Amortization (94) (72)    
Translation adjustment 158 295    
Balance at June 30, 2025 2,732 2,432    
Impairment recognition (note 20)   (165)    
Service concession rights [member]        
IfrsStatementLineItems [Line Items]        
Balance at December 31, 2024 1,750 1,697    
Cost 2,118 1,973 1,984 1,750
Accumulated amortization and impairment (250) (217) (234) (53)
Addition 10 7    
Capitalized borrowing costs    
Write-offs    
Transfers    
Amortization (1) (2)    
Translation adjustment 109 219    
Balance at June 30, 2025 1,868 1,756    
Impairment recognition (note 20)   (165)    
Software Licenses [Member]        
IfrsStatementLineItems [Line Items]        
Balance at December 31, 2024 751 538    
Cost 2,393 1,980 2,134 1,663
Accumulated amortization and impairment (1,552) (1,327) (1,383) (1,125)
Addition 122 106    
Capitalized borrowing costs 10 5    
Write-offs (1) (1)    
Transfers 4 2    
Amortization (93) (70)    
Translation adjustment 48 73    
Balance at June 30, 2025 841 653    
Impairment recognition (note 20)      
Goodwill [member]        
IfrsStatementLineItems [Line Items]        
Balance at December 31, 2024 22 20    
Cost 23 23 $ 22 $ 20
Addition    
Capitalized borrowing costs    
Write-offs    
Transfers    
Amortization    
Translation adjustment 1 3    
Balance at June 30, 2025 $ 23 23    
Impairment recognition (note 20)