v3.25.2
Assets held for sale and liabilities of disposal groups held for sale - Narrative (Details)
£ in Millions, € in Billions
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2025
GBP (£)
Sep. 30, 2025
GBP (£)
Dec. 31, 2025
GBP (£)
Jun. 30, 2025
GBP (£)
Jun. 30, 2024
GBP (£)
Dec. 31, 2026
GBP (£)
Dec. 31, 2024
GBP (£)
Jan. 01, 2024
GBP (£)
Jan. 01, 2024
EUR (€)
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale [1]       £ 28,122     £ 21,606    
Liabilities of disposal groups [1]       33,097     23,110    
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation       42 £ 62        
Assets to be disposed of       720,637     727,330    
Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets to be disposed of       28,128     21,620    
German Private Banking Business                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       2,000          
Liabilities of disposal groups       2,000          
German Private Banking Business | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets to be disposed of       1,959     1,775    
German Private Banking Business | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation     £ (200)            
Business in South Africa                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       600          
Liabilities of disposal groups       2,400          
Foreign currency translation reserve and other reserve losses       100          
Business in South Africa | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets to be disposed of       567     £ 536    
HSBC Assurances Vie (France) | HSBC Continental Europe                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       20,300          
Liabilities of disposal groups       19,600          
HSBC Assurances Vie (France) | Disposal of major subsidiary | HSBC Continental Europe                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation     £ 200            
French portfolio of home and other loan                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       4,500          
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation £ 1,000                
French portfolio of home and other loan | – net income from financial instruments held for trading or managed on a fair value basis                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Mark to market gain £ 100                
French portfolio of home and other loan | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets to be disposed of       4,524       £ 5,900 € 7.1
Germany custody business                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       700          
Liabilities of disposal groups       9,200          
Germany custody business | Discontinued operations                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets to be disposed of       740          
Germany custody business | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation           £ (100)      
Internationale Kapitalanlagegesellschaft mbH                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       100          
Liabilities of disposal groups       100          
HSBC Life (UK) Limited                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Assets held for sale       4,600          
Liabilities of disposal groups       £ 4,300          
HSBC Life (UK) Limited | Disposal of major subsidiary                  
Disclosure of analysis of single amount of discontinued operations [line items]                  
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation   £ 40              
[1] Includes businesses classified as held-for-sale as part of a broader restructuring of our European business. Refer to Note 11 'Assets held for sale and liabilities of
disposal groups held for sale' on page 48.