v3.25.4
Contingent liabilities, contractual commitments and guarantees - Summary of contingent liabilities, guarantees, and commitments (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities $ 120,324 $ 110,019
Commitments 948,637 861,578
Off-balance sheet commitments 360,260 334,622
Gross carrying amount    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 360,529 334,934
IFRS 9    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 707,902 635,988
IFRS 9 | Gross carrying amount    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 708,268 636,365
– documentary credits and short-term trade-related transactions    
Disclosure of contingent liabilities [line items]    
Commitments 6,959 7,096
– forward asset purchases and forward deposits placed    
Disclosure of contingent liabilities [line items]    
Commitments 84,978 61,017
– standby facilities, credit lines and other commitments to lend    
Disclosure of contingent liabilities [line items]    
Commitments 856,700 793,465
– loan and other credit-related commitments    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 257,845 242,211
– loan and other credit-related commitments | Gross carrying amount    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 257,845 242,211
– loan and other credit-related commitments | IFRS 9    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 690,477 619,019
– loan and other credit-related commitments | IFRS 9 | Gross carrying amount    
Disclosure of contingent liabilities [line items]    
Off-balance sheet commitments 690,792 619,367
HSBC Holdings    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 6,983 7,327
Commitments 0 0
HSBC Holdings | – documentary credits and short-term trade-related transactions    
Disclosure of contingent liabilities [line items]    
Commitments 0 0
HSBC Holdings | – forward asset purchases and forward deposits placed    
Disclosure of contingent liabilities [line items]    
Commitments 0 0
HSBC Holdings | – standby facilities, credit lines and other commitments to lend    
Disclosure of contingent liabilities [line items]    
Commitments 0 0
– financial guarantees    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 17,476 16,998
– financial guarantees | HSBC Holdings    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 0 0
– performance and other guarantees    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 102,684 92,723
– performance and other guarantees | HSBC Holdings    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 6,983 7,327
– other contingent liabilities    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities 164 298
– other contingent liabilities | HSBC Holdings    
Disclosure of contingent liabilities [line items]    
Guarantees and other contingent liabilities $ 0 $ 0