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Intangible assets and property, plant and equipment (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Intangible assets    
Beginning balance $ 1,473  
Additions 5  
Acquisition 6  
Charge for the period (70)  
Foreign exchange 17  
Ending balance 1,431  
Property, plant and equipment    
Beginning balance 2,390  
Additions 297  
Acquisition 4  
Disposals (4)  
Impairment (11)  
Charge for the period (128) $ (104)
Foreign exchange 27  
Ending balance $ 2,575