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Disposal of assets and other transactions (Details 1)
$ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
IfrsStatementLineItems [Line Items]  
Contingent assets at the ending $ 6,887
Assets recognized 114
Assets recognized in previous periods 2,312
Contingent assets at the beginning $ 4,461
Transaction Contingent Assets One [Member]  
IfrsStatementLineItems [Line Items]  
Closing date April 2022
Contingent assets at the ending $ 5,263
Assets recognized 52
Assets recognized in previous periods 1,272
Contingent assets at the beginning $ 3,939
Transaction Contingent Assets Two [Member]  
IfrsStatementLineItems [Line Items]  
Closing date December 2019
Contingent assets at the ending $ 62
Assets recognized in previous periods 58
Contingent assets at the beginning $ 4
Transaction Contingent Assets Three [Member]  
IfrsStatementLineItems [Line Items]  
Closing date July 2020
Contingent assets at the ending $ 650
Assets recognized 36
Assets recognized in previous periods 303
Contingent assets at the beginning $ 311
Transaction Contingent Assets Four [Member]  
IfrsStatementLineItems [Line Items]  
Closing date November 2020
Contingent assets at the ending $ 285
Assets recognized 8
Assets recognized in previous periods 253
Contingent assets at the beginning $ 24
Transaction Contingent Assets Five [Member]  
IfrsStatementLineItems [Line Items]  
Closing date December 2021
Contingent assets at the ending $ 118
Assets recognized in previous periods 106
Contingent assets at the beginning $ 12
Transaction Contingent Assets Six [Member]  
IfrsStatementLineItems [Line Items]  
Closing date August 2022
Contingent assets at the ending $ 43
Assets recognized in previous periods 10
Contingent assets at the beginning $ 33
Transaction Contingent Assets Seven [Member]  
IfrsStatementLineItems [Line Items]  
Closing date December 2022
Contingent assets at the ending $ 90
Assets recognized 18
Assets recognized in previous periods 32
Contingent assets at the beginning $ 40
Transaction Contingent Assets Eighth [Member]  
IfrsStatementLineItems [Line Items]  
Closing date January 2023
Contingent assets at the ending $ 250
Assets recognized in previous periods 225
Contingent assets at the beginning $ 25
Transaction Contingent Assets Nine [Member]  
IfrsStatementLineItems [Line Items]  
Closing date April 2023
Contingent assets at the ending $ 66
Assets recognized in previous periods 33
Contingent assets at the beginning $ 33
Transaction Contingent Assets Ten [Member]  
IfrsStatementLineItems [Line Items]  
Closing date August 2023
Contingent assets at the ending $ 60
Assets recognized in previous periods 20
Contingent assets at the beginning $ 40