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Intangible assets and property, plant and equipment (Details)
$ in Millions
6 Months Ended
Jun. 30, 2025
USD ($)
Intangible assets  
Beginning balance $ 1,223
Additions 3
Charge for the year (68)
Exchange 84
Ending balance 1,242
Property, plant and equipment  
Beginning balance 2,480
Additions 113
Impairment (10)
Charge for the period (157)
Foreign exchange 100
Ending balance $ 2,526