v3.25.4
Derivatives - Fair value hedges - Hedged item by hedged risk (Details) - Fair value hedges - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Interest rate    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets $ 144,053 $ 107,462
Carrying amount, liabilities 81,738 73,988
Accumulated fair value hedge adjustments included in carrying amount, assets (998) (2,794)
Accumulated fair value hedge adjustments included in carrying amount, liabilities (980) (2,066)
Change in fair value 659 441
Gain (loss) on hedge ineffectiveness recognised in profit or loss (2) (8)
Interest rate | HSBC Holdings    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 9,891 7,769
Carrying amount, liabilities 80,258 78,402
Accumulated fair value hedge adjustments included in carrying amount, assets (48) (244)
Accumulated fair value hedge adjustments included in carrying amount, liabilities (1,072) (2,423)
Change in fair value (1,144) 1,094
Gain (loss) on hedge ineffectiveness recognised in profit or loss (7) (9)
Interest rate | Financial investments - measured at fair value through other comprehensive income    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 115,156 93,055
Accumulated fair value hedge adjustments included in carrying amount, assets (1,091) (2,701)
Change in fair value 1,513 (728)
Accumulated fair value hedge adjustment remaining in statement of financial position for hedged item that ceased to be adjusted for hedging gains and losses, assets 257 311
Interest rate | Financial investments - measured at amortised cost    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 2,845 492
Accumulated fair value hedge adjustments included in carrying amount, assets 31 11
Change in fair value 18 (14)
Interest rate | Loans and advances to customers    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 26,052 13,915
Accumulated fair value hedge adjustments included in carrying amount, assets 62 (104)
Change in fair value 157 16
Interest rate | Reverse repurchase agreements – non-trading    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 0 0
Accumulated fair value hedge adjustments included in carrying amount, assets 0 0
Change in fair value 0 0
Interest rate | Debt securities in issue    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 53,482 72,576
Accumulated fair value hedge adjustments included in carrying amount, liabilities (370) (1,800)
Change in fair value (586) 1,110
Accumulated fair value hedge adjustment remaining in statement of financial position for hedged item that ceased to be adjusted for hedging gains and losses, liabilities 733 745
Interest rate | Debt securities in issue | HSBC Holdings    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 55,770 78,402
Accumulated fair value hedge adjustments included in carrying amount, liabilities (710) (2,423)
Change in fair value (870) 861
Gain (loss) on hedge ineffectiveness recognised in profit or loss (7) (9)
Accumulated fair value hedge adjustment remaining in statement of financial position for hedged item that ceased to be adjusted for hedging gains and losses, assets 1,142 1,216
Interest rate | Deposits by banks    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 201  
Accumulated fair value hedge adjustments included in carrying amount, liabilities 0  
Change in fair value 2  
Interest rate | Customer accounts    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 2,237 207
Accumulated fair value hedge adjustments included in carrying amount, liabilities 0 0
Change in fair value 1 0
Interest rate | Subordinated liabilities    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 25,818 1,205
Accumulated fair value hedge adjustments included in carrying amount, liabilities (610) (266)
Change in fair value (446) 57
Interest rate | Subordinated liabilities | HSBC Holdings    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, liabilities 24,488  
Accumulated fair value hedge adjustments included in carrying amount, liabilities (361)  
Change in fair value (447)  
Interest rate | Loans and advances to banks | HSBC Holdings    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 9,225 7,769
Accumulated fair value hedge adjustments included in carrying amount, assets (39) (244)
Change in fair value 183 233
Foreign exchange | Investment In Subsidiaries | HSBC Holdings    
Disclosure of detailed information about hedged items [line items]    
Carrying amount, assets 666 0
Accumulated fair value hedge adjustments included in carrying amount, assets (9) 0
Change in fair value $ (9) $ 0