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Interests in associates and joint ventures - Principal associates of HSBC (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Bank of Communications Co., Limited    
Disclosure of associates [line items]    
Carrying amount $ 23,344 $ 23,307
Fair value 9,363 8,141
Saudi Awwal Bank    
Disclosure of associates [line items]    
Carrying amount 4,704 4,494
Fair value $ 6,479 $ 6,602