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Intangible assets - Increase (decrease) in recoverable amount of CGU (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
Increase  
Disclosure of detailed information about intangible assets [line items]  
Discount rate $ (625)
Terminal growth rate 512
Decrease  
Disclosure of detailed information about intangible assets [line items]  
Discount rate 766
Terminal growth rate $ (406)