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Derivatives - Notional contract amounts and fair value of derivatives by product contract type held by HSBC (Details)
number in Millions, $ in Millions
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 23,117,598 $ 23,889,261
Nominal contract amount of hedging instruments 206,760 192,457
Fair value of trading assets $ 247,449 $ 374,606
Fair value of hedging assets 2,811 2,223
Gross total fair values of derivative assets 250,260 376,829
Fair value of derivative assets 196,882 307,726
Fair value of trading liabilities 243,269 368,035
Fair value of hedging liabilities 1,173 4,069
Gross total fair values of derivative liabilities 244,442 372,104
Fair value of derivative liabilities 191,064 303,001
Derivatives    
Disclosure of detailed information about hedging instruments [line items]    
Amounts offset on derivative liabilities (53,378) (69,103)
Derivatives    
Disclosure of detailed information about hedging instruments [line items]    
Amounts offset on derivative assets (53,378) (69,103)
Foreign exchange    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 7,723,034 $ 7,606,446
Nominal contract amount of hedging instruments 43,839 35,021
Fair value of trading assets $ 79,801 $ 106,696
Fair value of hedging assets 1,062 309
Gross total fair values of derivative assets 80,863 107,005
Fair value of trading liabilities 77,670 108,903
Fair value of hedging liabilities 207 1,182
Gross total fair values of derivative liabilities 77,877 110,085
Interest rate    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 14,470,539 $ 15,240,867
Nominal contract amount of hedging instruments 162,921 157,435
Fair value of trading assets $ 151,631 $ 249,204
Fair value of hedging assets 1,749 1,914
Gross total fair values of derivative assets 153,380 251,118
Fair value of trading liabilities 146,808 236,594
Fair value of hedging liabilities 966 2,887
Gross total fair values of derivative liabilities 147,774 239,481
Equities    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 659,142 $ 652,288
Nominal contract amount of hedging instruments 0 0
Fair value of trading assets $ 12,637 $ 14,043
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 12,637 14,043
Fair value of trading liabilities 14,379 15,766
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities 14,379 15,766
Credit    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 190,724 $ 269,401
Nominal contract amount of hedging instruments 0 0
Fair value of trading assets $ 2,175 $ 2,590
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 2,175 2,590
Fair value of trading liabilities 3,151 3,682
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities 3,151 3,682
Commodity and other    
Disclosure of detailed information about hedging instruments [line items]    
Notional contract amount of trading instruments $ 74,159 $ 120,259
Nominal contract amount of hedging instruments 0 0
Fair value of trading assets $ 1,205 $ 2,073
Fair value of hedging assets 0 0
Gross total fair values of derivative assets 1,205 2,073
Fair value of trading liabilities 1,261 3,090
Fair value of hedging liabilities 0 0
Gross total fair values of derivative liabilities $ 1,261 $ 3,090