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Intangible assets - Schedule of Goodwill attributed to cash-generating units (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Jun. 30, 2023
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit $ 2,860 $ 2,807
United States    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit 968 968
Türkiye    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit 370 271
Greater China    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit 158 157
India    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit 838 848
Latin America and Caribbean – Mexico    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit 189 203
Other cash-generating units    
Disclosure of information for cash-generating units [line items]    
Goodwill attributed to cash-generating unit $ 337 $ 360