Dividends Paid To Holders Of Other Equity Instruments, Classified As Financing Activities Dividends Paid To Holders Of Other Equity Instruments, Classified As Financing Activities August 2019 Share Buy Back Program [Member] August 2019 Share Buy Back Program 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 Operating expense Operating Income, Before Insurance Claims And Benefits Paid And Movement In Liabilities To Policyholders And Loan Impairment Charges And Other Credit Risk Provisions Operating Income, Before Insurance Claims And Benefits Paid And Movement In Liabilities To Policyholders And Loan Impairment Charges And Other Credit Risk Provisions Operating Income, Before Insurance Claims And Benefits Paid And Movement In Liabilities To Policyholders And Loan Impairment Charges And Other Credit Risk Provisions Hsbc Finance Netherlands [Member] Hsbc Finance Netherlands Cash and bank balances at central banks Fee and commission income (expense) 2017 Share Buy-Back Program [Member] 2017 Share Buy-Back Program Adjustments For Increase (Decrease) In Debt Securities In Issue Adjustments For Increase (Decrease) In Debt Securities In Issue Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income Prepayments, Accrued Income And Other Assets Prepayments, Accrued Income And Other Assets Other Comprehensive Income, Net Of Tax, Gains (Losses) From Effects Of Hyperinflation Other Comprehensive Income, Net Of Tax, Gains (Losses) From Effects Of Hyperinflation Other equity instruments Hsbc Finance Corporation [Member] Hsbc Finance Corporation Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchased And Retired During Period, Shares Stock Repurchased And Retired During Period, Shares Loans and advances to banks Adjustments For Decrease (Increase) In Financial Assets At Fair Value Through Profit Or Loss, Designated Upon Initial Recognition Or Subsequently Adjustments For Decrease (Increase) In Financial Assets At Fair Value Through Profit Or Loss, Designated Upon Initial Recognition Or Subsequently Capital Securities Classified As Equity [Member] Capital Securities Classified As Equity [Member] 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 Financial Assets At Fair Value Through Profit Or Loss, Excluding Those Classified As Held For Trading Financial Assets At Fair Value Through Profit Or Loss, Excluding Those Classified As Held For Trading Balances with banks Profit (Loss) Attributable To Preference Equity Holders Of Parent Entity Profit (Loss) Attributable To Preference Equity Holders Of Parent Entity Net Operating Income Net Operating Income Net Operating Income Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans Cash flows from (used in) investing activities Revenue and other operating income Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Contingent Convertible Securities [Member] Contingent Convertible Securities [Member] Adjustments For Increase (Decrease) In Net Trading Securities And Derivatives Adjustments For Increase (Decrease) In Net Trading Securities And Derivatives 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 Other comprehensive income, net of tax, gains (losses) from investments in equity instruments Adjustments for Decrease (Increase) In Financial Assets At Fair Value Through Other Comprehensive Income And At Amortised Cost Adjustments for Decrease (Increase) In Financial Assets At Fair Value Through Other Comprehensive Income And At Amortised Cost Interest income (expense) Changes In Fair Value Of Designated Debt And Related Derivatives Changes In Fair Value Of Designated Debt And Related Derivatives Usd 4150 Million Perpetual Subordinated Contingent Convertible Securities [Member] Usd 4150 Million Perpetual Subordinated Contingent Convertible Securities Hsbc Overseas Holdings Uk Limited [Member] Hsbc Overseas Holdings Uk Limited Payables to related parties Items in course of collection from other banks Comprehensive Income, Attributable To Other Equity Owners Of Parent Comprehensive Income, Attributable To Other Equity Owners Of Parent Sgd 750 Million 5 Percent Perpetual Subordinated Contingent Convertible Securities [Member] Sgd 750 Million 5 Percent Perpetual Subordinated Contingent Convertible Securities Adjustments For Increase (Decrease) In Deposits To Bank And Customer Accounts Adjustments For Increase (Decrease) In Deposits To Bank And Customer Accounts Subsidiaries' Repayment Of Capital Invested Subsidiaries' Repayment Of Capital Invested Dividends Paid On Ordinary Shares, Classified As Financing Activities Dividends Paid On Ordinary Shares, Classified As Financing Activities 8.125% Perpetual Subordinated Capital Securities [Member] 8.125% Perpetual Subordinated Capital Securities Accruals, Deferred Income And Other Liabilities Accruals, Deferred Income And Other Liabilities Equity, Cumulative Acquisition Value Equity, Cumulative Acquisition Value Cash Receipts From Repayment Of Capital From Subsidiaries, Classified As Investing Activities Cash Receipts From Repayment Of Capital From Subsidiaries, Classified As Investing Activities Comprehensive Income, Attributable To Preference Equity Owners Of Parent Comprehensive Income, Attributable To Preference Equity Owners Of Parent May 2018 Share Buy-Back Program [Member] May 2018 Share Buy-Back Program [Member] Adjustments For Non-Cash Items Adjustments For Non-Cash Items Adjustments For Non-Cash Items Investments in subsidiaries Reverse repurchase agreements and cash collateral on securities borrowed Proceeds (Payments) From Sale (Purchase) Of Treasury Shares Proceeds (Payments) From Sale (Purchase) Of Treasury Shares Assets [abstract] Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Cash Collateral And Net Settlement Accounts Cash Collateral And Net Settlement Accounts Items in course of transmission to other banks Stock Issued During Period, Value, Stock Dividend Stock Issued During Period, Value, Stock Dividend Liabilities Arising From Insurance Contracts, Gross Liabilities Arising From Insurance Contracts, Gross Other comprehensive income, net of tax, change in fair value of financial liability attributable to change in credit risk of liability Gbp1,000 Million 5.875 Percent Perpetual Subordinated Contingent Convertible Securities [Member] Gbp1,000 Million 5.875 Percent Perpetual Subordinated Contingent Convertible Securities Gains (losses) on cash flow hedges, before tax Adjustments For Increase (Decrease) In Financial Liabilities At Fair Value Through Profit Or Loss, Designated Upon Initial Recognition Or Subsequently Adjustments For Increase (Decrease) In Financial Liabilities At Fair Value Through Profit Or Loss, Designated Upon Initial Recognition Or Subsequently Payments Of Contributions To Defined Benefit Plans Payments Of Contributions To Defined Benefit Plans Impairment Loss (Reversal Of Impairment Loss) Recognized In Profit Or Loss, Subsidiary Impairment Loss (Reversal Of Impairment Loss) Recognized In Profit Or Loss, Subsidiary Payments To Cancel Shares Payments To Cancel Shares Gain (Loss) From Investing Activities Gain (Loss) From Investing Activities Issued Capital And Share Premium [Member] Issued Capital And Share Premium Adjustments For Decrease (Increase) In Loans And Advances To Bank And Customers Adjustments For Decrease (Increase) In Loans And Advances To Bank And Customers Other provisions October 2021 Share Buy Back Program [Member] October 2021 Share Buy Back Program Loans And Advances To Banks Of One Month Or Less Loans And Advances To Banks Of One Month Or Less Loans And Advances To Banks Of One Month Or Less 8.000% Perpetual Subordinated Capital Securities, Series 2 [Member] 8.000% Perpetual Subordinated Capital Securities, Series 2 Hsbc France [Member] Hsbc France Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Net Cash Inflow (Outflow) From Acquisition And Disposal Of Subsidiaries, Businesses, Associates, And Joint Ventures Net Cash Inflow (Outflow) From Acquisition And Disposal Of Subsidiaries, Businesses, Associates, And Joint Ventures Proceeds From Issuing Shares And Other Equity Instruments Proceeds From Issuing Shares And Other Equity Instruments Equity, Cumulative Goodwill Equity, Cumulative Goodwill 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 Cash flows from (used in) financing activities Hsbc France old [Member] Hsbc France old Cash flows from (used in) operating activities