Gains (Losses) From Early Redemption Of Legacy Securities Gains (Losses) From Early Redemption Of Legacy Securities Increase (Decrease) Through Insurance Finance Income (Expense) From Insurance Contracts, Excluded From Profit Or Loss, Equity Increase (Decrease) Through Insurance Finance Income (Expense) From Insurance Contracts, Excluded From Profit Or Loss, Equity Increase (Decrease) Through Transfer Between Merger Reserve And Retained Earnings, Equity Increase (Decrease) Through Transfer Between Merger Reserve And Retained Earnings, Equity Equity Instruments, Interest Rate Equity Instruments, Interest Rate Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax HSBC Overseas Holdings (UK) Limited [Member] HSBC Overseas Holdings (UK) Limited Cash Outflow From Acquisition Of Subsidiaries, Businesses, Associates, And Joint Ventures Cash Outflow From Acquisition Of Subsidiaries, Businesses, Associates, And Joint Ventures SGD 0,8bn 5.0% Perpetual Subordinated Contingent Convertible Securities [Member] SGD 0,8bn 5.0% Perpetual Subordinated Contingent Convertible Securities Other comprehensive income, net of tax, gains (losses) from investments in equity instruments Legal Entity [Axis] Legal Entity Other Comprehensive Income, Net Of Tax, Gains (Losses) From Effects Of Hyperinflation Other Comprehensive Income, Net Of Tax, Gains (Losses) From Effects Of Hyperinflation Prepayments, Accrued Income And Other Assets Prepayments, Accrued Income And Other Assets HSBC Holdings [Member] HSBC Holdings [Member] Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Argentina Business [Member] Argentina Business Payments For (Proceeds From) Subsidiaries Payments For (Proceeds From) Subsidiaries Other comprehensive income, net of tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets French Life Insurance Business [Member] French Life Insurance Business Legal Entity1 [Member] Legal Entity1 Impairment Loss (Reversal Of Impairment Loss) Recognised In Profit Or Loss, Loans Impairment Charges And Other Risk Provisions Impairment Loss (Reversal Of Impairment Loss) Recognised In Profit Or Loss, Loans Impairment Charges And Other Risk Provisions Bank of Communications Co., Limited (‘BoCom’) [Member] Bank of Communications Co., Limited (‘BoCom’) Financial Assets At Fair Value Through Other Comprehensive Income And At Amortised Cost Financial Assets At Fair Value Through Other Comprehensive Income And At Amortised Cost Reclassification Adjustments Of Other Reserves Losses Of Net Investments In Foreign Operations, Before Tax Reclassification Adjustments Of Other Reserves Losses Of Net Investments In Foreign Operations, Before Tax Increase (Decrease) Through Transfer Between Share Premium To Retained Earnings, Equity Increase (Decrease) Through Transfer Between Share Premium To Retained Earnings, Equity Gain (Loss) Recognised On Measurement To Fair Value Less Costs To Sell Or On Disposal Of Assets Or Disposal Groups Constituting Discontinued Operation, Excluding Hedging Gain Gain (Loss) Recognised On Measurement To Fair Value Less Costs To Sell Or On Disposal Of Assets Or Disposal Groups Constituting Discontinued Operation, Excluding Hedging Gain HSBC Continental Europe [Member] HSBC Continental Europe Bahrain Retail Banking Business [Member] Bahrain Retail Banking Business Cash flows from (used in) financing activities Retail Banking Operations, France [Member] Retail Banking Operations, France Other Comprehensive Income, Net Of Tax, Cash Flow Hedges, Excluding Disposal Of Subsidiary Other Comprehensive Income, Net Of Tax, Cash Flow Hedges, Excluding Disposal Of Subsidiary Repayments of subordinated liabilities Repayments Of Securities Reclassification Adjustments Of Fair Value Gain (Loss) Of Associates And Joint Ventures, Before Tax Reclassification Adjustments Of Fair Value Gain (Loss) Of Associates And Joint Ventures, Before Tax Increase (Decrease) Through Transfer Between Capital Redemption Reserves And Retained Earnings, Equity Increase (Decrease) Through Transfer Between Capital Redemption Reserves And Retained Earnings, Equity Net Operating Income Net Operating Income Net Operating Income $2,5bn 6.375% Perpetual Subordinated Contingent Convertible Securities [Member] $2,450m 6.375% Perpetual Subordinated Contingent Convertible Securities [Member] Hang Seng Bank (China) Limited [Member] Hang Seng Bank (China) Limited [Member] German Private Banking Business [Member] German Private Banking Business Cash flows from (used in) investing activities Banking Business In Canada [Member] Banking Business In Canada Government Certificates Of Indebtedness Government Certificates Of Indebtedness Other provisions Cash And Bank Balances At Central Banks [Member] Cash And Bank Balances At Central Banks [Member] Increase (Decrease) Through Other Reserves Reclassified To Income Statement On Disposal Of A Foreign Operation, Equity Increase (Decrease) Through Other Reserves Reclassified To Income Statement On Disposal Of A Foreign Operation, Equity Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Loans And Advances To Banks [Member] Loans And Advances To Banks [Member] Disposal Of Financial Assets Measured At Fair Value Through Other Comprehensive Income, Before Tax Disposal Of Financial Assets Measured At Fair Value Through Other Comprehensive Income, Before Tax Balance Sheet Location1 [Member] Balance Sheet Location1 Adjustments For Increase (Decrease) In Net Trading Securities And Derivatives Adjustments For Increase (Decrease) In Net Trading Securities And Derivatives Assets [abstract] Reverse repurchase agreements and cash collateral on securities borrowed Share Of Other Comprehensive Income Of Associates And Joint Ventures Accounted For Using Equity Method That Will Be Reclassified To Profit Or Loss, Current Year Share, Net Of Tax Share Of Other Comprehensive Income Of Associates And Joint Ventures Accounted For Using Equity Method That Will Be Reclassified To Profit Or Loss, Current Year Share, Net Of Tax Short-term Investments And Deposits, Classified As Cash Equivalents Short-term Investments And Deposits, Classified As Cash Equivalents Reverse Repurchase Agreements With Banks [Member] Reverse Repurchase Agreements With Banks Items In Course Of Transmission To Other Banks [Member] Items In Course Of Transmission To Other Banks [Member] Cash flows from (used in) operating activities Comprehensive Income, Attributable To Other Equity Owners Of Parent Comprehensive Income, Attributable To Other Equity Owners Of Parent Amortisation And Impairment (Reversal Of Impairment) Recognised In Profit Or Loss, Intangible Assets Other Than Goodwill Amortisation And Impairment (Reversal Of Impairment) Recognised In Profit Or Loss, Intangible Assets Other Than Goodwill Other Comprehensive Income, Net Of Tax, Financial Assets Measured At Fair Value Through Other Comprehensive Income, Excluding Disposal Of Subsidiary Other Comprehensive Income, Net Of Tax, Financial Assets Measured At Fair Value Through Other Comprehensive Income, Excluding Disposal Of Subsidiary Revenue and other operating income Operating expense Accruals, Deferred Income And Other Liabilities Accruals, Deferred Income And Other Liabilities Bank Of Communications Co., Limited [Member] Bank Of Communications Co., Limited [Member] Disposal Group Name [Member] Disposal Group Name Disposal Of Cash Flow Hedges, Before Tax Disposal Of Cash Flow Hedges, Before Tax Balance Sheet Location1 [Axis] Balance Sheet Location [Axis] Proceeds (Payments) From Sale (Purchase) Of Treasury Shares Proceeds (Payments) From Sale (Purchase) Of Treasury Shares Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Other equity instruments $1,5bn 6.950% Perpetual Subordinated Contingent Convertible Securities [Member] $1,5bn 6.950% Perpetual Subordinated Contingent Convertible Securities Cash Collateral And Net Settlement Accounts And Items In Course Of Collection From/Transmission To Other Banks Cash Collateral And Net Settlement Accounts And Items In Course Of Collection From/Transmission To Other Banks Cash Inflow From Disposal Of Subsidiaries, Businesses, Associates, And Joint Ventures Net Cash Inflow (Outflow) From Acquisition And Disposal Of Subsidiaries, Businesses, Associates, And Joint Ventures Impairment Loss Recognised in Profit (Loss), Interest In Associates Impairment Loss Recognised in Profit (Loss), Interest In Associates Interest income (expense) Payments Of Contributions To Defined Benefit Plans Payments Of Contributions To Defined Benefit Plans Gain (Loss) From Investing Activities Gain (Loss) From Investing Activities Issued Capital And Share Premium [Member] Issued Capital And Share Premium Loans And Advances To Banks Of One Month Or Less Loans And Advances To Banks Of One Month Or Less Disposal Group Name [Axis] Disposal Group Name Fee and commission income (expense) Loans and advances to banks Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent Other comprehensive income, net of tax, change in fair value of financial liability attributable to change in credit risk of liability Proceeds From Issuing Shares And Other Equity Instruments Proceeds From Issuing Shares And Other Equity Instruments Reclassification Adjustments Of Other Comprehensive Income Of Associates And Joint Ventures Reclassification Adjustments Of Other Comprehensive Income Of Associates And Joint Ventures France Retail Banking Business [Member] France Retail Banking Business HSBC Holdings Employee Benefit Trust [Member] HSBC Holdings Employee Benefit Trust Currency Notes In Circulation Currency Notes In Circulation