v3.25.4
Derivatives - Notional contract amounts and fair values of derivatives by product contract type held by HSBC Holdings with subsidiaries (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 32,176,498 $ 30,052,812
Nominal contract amount of hedging instruments 532,346 488,270
Trading Assets $ 328,804 $ 373,855
Fair value of hedging assets 6,179 7,528
Fair value of derivative assets 237,740 268,637
Fair value of trading liabilities 329,870 372,189
Fair value of hedging liabilities 5,227 5,005
Fair value of derivative liabilities 237,854 264,448
HSBC Holdings    
Disclosure of detailed information about hedging instruments [line items]    
Fair value of derivative assets 1,942 3,054
Fair value of derivative liabilities 3,451 5,340
Foreign exchange    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 13,639,520 $ 11,706,591
Nominal contract amount of hedging instruments 108,585 82,161
Trading Assets $ 111,012 $ 142,055
Fair value of hedging assets 1,233 2,738
Fair value of trading liabilities 110,786 133,910
Fair value of hedging liabilities 662 75
Interest rate    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 17,272,408 $ 17,316,173
Nominal contract amount of hedging instruments 423,761 406,109
Trading Assets $ 190,296 $ 209,794
Fair value of hedging assets 4,946 4,790
Fair value of trading liabilities 182,569 212,980
Fair value of hedging liabilities $ 4,565 $ 4,930
Fair value hedges    
Disclosure of detailed information about hedging instruments [line items]    
Nominal contract amount of hedging instruments 233,741 190,332
Fair value of hedging assets $ 3,851 $ 4,180
Fair value of hedging liabilities 4,283 4,411
Fair value hedges | HSBC Holdings    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 69,964 $ 81,972
Nominal contract amount of hedging instruments 92,281 90,074
Trading Assets $ 1,371 $ 2,340
Fair value of hedging assets 571 714
Fair value of derivative assets 1,942 3,054
Fair value of trading liabilities 1,299 1,502
Fair value of hedging liabilities 2,152 3,838
Fair value of derivative liabilities 3,451 5,340
Fair value hedges | Foreign exchange | HSBC Holdings    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 48,660 $ 51,437
Nominal contract amount of hedging instruments 681 0
Trading Assets $ 570 $ 796
Fair value of hedging assets 10 0
Fair value of derivative assets 580 796
Fair value of trading liabilities 941 1,015
Fair value of hedging liabilities 0 0
Fair value of derivative liabilities 941 1,015
Fair value hedges | Interest rate | HSBC Holdings    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 21,304 $ 30,535
Nominal contract amount of hedging instruments 91,600 90,074
Trading Assets $ 801 $ 1,544
Fair value of hedging assets 561 714
Fair value of derivative assets 1,362 2,258
Fair value of trading liabilities 358 487
Fair value of hedging liabilities 2,152 3,838
Fair value of derivative liabilities $ 2,510 $ 4,325