v3.26.1
Assets held for sale, liabilities of disposal groups held for sale and business acquisitions - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 10 Months Ended
Jun. 30, 2026
Jan. 30, 2026
Sep. 16, 2025
Sep. 30, 2026
Jun. 30, 2027
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale [1]           $ (433) $ (34)    
Assets held for sale $ 22,732         22,732   $ 22,732 $ 11,115
Liabilities of disposal groups held for sale 30,097         30,097   30,097 23,382
Total external assets 3,438,161         3,438,161 3,214,371 3,438,161 3,233,034
Liabilities 3,241,080         3,241,080   3,241,080 3,027,368
Expense of restructuring activities           318 $ 616    
Insurance contract liabilities 130,053         130,053   130,053 122,955
Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 22,336         22,336   22,336 9,713
Liabilities 30,097         30,097   30,097 23,382
Insurance contract liabilities 10,645         10,645   10,645 4,925
HSBC Continental Europe | HSBC Bank Malta p.l.c.                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Proportion of ownership interest in subsidiary     70.03%            
HSBC Bank Malta p.l.c.                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale           (300)      
Assets held for sale 19,300         19,300   19,300  
Liabilities of disposal groups held for sale 20,400         20,400   20,400  
HSBC Bank Malta p.l.c. | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 8,355         8,355   8,355  
Liabilities 8,046         8,046   8,046  
Insurance contract liabilities 630         630   630  
HSBC Bank Malta p.l.c. | HSBC Continental Europe | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale               (300)  
UK Life Insurance Business                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale           (200)      
UK Life Insurance Business | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets                 6,624
Liabilities                 6,386
Insurance contract liabilities                 4,925
UK Life Insurance Business | HSBC Bank plc | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets                 6,600
Liabilities                 6,400
Increase/(decrease) through foreign exchange reclassified to income statement on disposal of a foreign operation   $ (200)              
Sri Lanka retail banking business                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale           0      
Sri Lanka retail banking business | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets                 121
Liabilities                 470
Insurance contract liabilities                 0
Egypt Retail Banking Business | HSBC Bank Egypt S.A.E. | Forecast                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale         $ (300)        
Egypt Retail Banking Business | HSBC Bank Egypt S.A.E. | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 400         400   400  
Liabilities 2,800         2,800   2,800  
Australian Home and Personal Loans Portfolio | HSBC Austrailia                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Increase/(decrease) through foreign exchange reclassified to income statement on disposal of a foreign operation (300)                
Australian Home and Personal Loans Portfolio | HSBC Austrailia | Forecast                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Expense of restructuring activities         300        
Australian Home and Personal Loans Portfolio | HSBC Austrailia | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 25,300         25,300   25,300  
Singapore Insurance | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 10,737         10,737   10,737  
Liabilities 10,434         10,434   10,434  
Insurance contract liabilities 10,015         10,015   10,015  
Singapore Insurance | HSBC Insurance (Asia-Pacific) Holdings Limited                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale 10,700         10,700   10,700  
Liabilities of disposal groups held for sale 10,400         10,400   10,400  
Singapore Insurance | HSBC Insurance (Asia-Pacific) Holdings Limited | Disposal groups classified as held for sale                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Insurance contract liabilities 1,400         1,400   1,400  
Singapore Insurance | HSBC Insurance (Asia-Pacific) Holdings Limited | Forecast                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale         1,800        
HSBC Bank (Uruguay) S.A. | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets 2,287         2,287   2,287 2,142
Liabilities 2,077         2,077   2,077 1,959
Insurance contract liabilities 0         0   0 0
PT Bank HSBC Indonesia | Forecast | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale         $ 400        
PT Bank HSBC Indonesia | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale 200         200   200  
Liabilities of disposal groups held for sale 1,900         1,900   1,900  
Total external assets 243         243   243  
Liabilities 1,917         1,917   1,917  
Insurance contract liabilities 0         $ 0   $ 0  
South Africa | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets                 442
Liabilities                 2,082
Insurance contract liabilities                 0
South Africa | HSBC Bank plc                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Increase/(decrease) through foreign exchange reclassified to income statement on disposal of a foreign operation $ (100)                
South Africa | HSBC Bank plc | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Total external assets                 400
Liabilities                 $ 2,100
Germany Custody Business | HSBC Continental Europe | Forecast | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain/(loss) recognised on assets held for sale       $ 100          
[1] Amounts in 1H26 include $0.2bn from the recycling of foreign currency translation reserve losses arising on completion of the sale of our UK life insurance
business, HSBC Life (UK) Limited, and $0.3bn of disposal losses recognised upon the ‘held for sale‘ classification of HSBC Continental Europe’s shareholding in
HSBC Bank Malta p.l.c.