v3.26.1
Derivatives - Notional contract amounts and fair value of derivatives by product contract type held by HSBC (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 36,351,118 $ 32,176,498
Notional contract amount of hedging instruments 580,534 532,346
Fair value of trading assets $ 355,511 $ 328,804
Fair value of hedging assets 5,099 6,179
Gross total fair values of derivative assets 360,610 334,983
Fair value of derivative assets 255,995 237,740
Fair value of trading liabilities 354,433 329,870
Fair value of hedging liabilities 4,844 5,227
Gross total fair values of derivative liabilities 359,277 335,097
Fair value of derivative liabilities 254,662 237,854
Derivatives    
Disclosure of detailed information about hedging instruments [line items]    
Amounts offset on derivative liabilities (104,615) (97,243)
Derivatives    
Disclosure of detailed information about hedging instruments [line items]    
Amounts offset on derivative assets (104,615) (97,243)
Foreign exchange    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 16,532,234 $ 13,639,520
Notional contract amount of hedging instruments 116,342 108,585
Fair value of trading assets $ 133,443 $ 111,012
Fair value of hedging assets 1,846 1,233
Gross total fair values of derivative assets 135,289 112,245
Fair value of trading liabilities 128,305 110,786
Fair value of hedging liabilities 489 662
Gross total fair values of derivative liabilities 128,794 111,448
Interest rate    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 18,373,942 $ 17,272,408
Notional contract amount of hedging instruments 464,192 423,761
Fair value of trading assets $ 190,562 $ 190,296
Fair value of hedging assets 3,253 4,946
Gross total fair values of derivative assets 193,815 195,242
Fair value of trading liabilities 185,275 182,569
Fair value of hedging liabilities 4,355 4,565
Gross total fair values of derivative liabilities 189,630 187,134
Equities    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 1,038,298 $ 908,649
Notional contract amount of hedging instruments 0 0
Fair value of trading assets $ 21,812 $ 15,660
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 21,812 15,660
Fair value of trading liabilities 30,829 21,311
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities 30,829 21,311
Credit    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 243,571 $ 164,160
Notional contract amount of hedging instruments 0 0
Fair value of trading assets $ 2,712 $ 1,294
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 2,712 1,294
Fair value of trading liabilities 3,492 2,212
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities 3,492 2,212
Commodity and other    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 163,073 $ 191,761
Notional contract amount of hedging instruments 0 0
Fair value of trading assets $ 6,982 $ 10,542
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 6,982 10,542
Fair value of trading liabilities 6,532 12,992
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities $ 6,532 $ 12,992