Assets [abstract] 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 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 Fee and commission income (expense) Adjustments For Increase (Decrease) In Debt Securities In Issue Adjustments For Increase (Decrease) In Debt Securities In Issue 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 Finance Corporation [Member] Hsbc Finance Corporation Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount 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 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 Other comprehensive income, net of tax, gains (losses) from investments in equity instruments Loans and advances to 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 Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Profit (Loss) Attributable To Other Equity Holders Of Parent Entity Interest income (expense) 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, change in fair value of financial liability attributable to change in credit risk of liability 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 Cash flows from (used in) operating activities Other equity instruments Comprehensive Income, Attributable To Other Equity Owners Of Parent Comprehensive Income, Attributable To Other Equity Owners Of Parent Adjustments For Increase (Decrease) In Deposits To Bank And Customer Accounts Adjustments For Increase (Decrease) In Deposits To Bank And Customer Accounts Accruals, Deferred Income And Other Liabilities Accruals, Deferred Income And Other Liabilities Equity, Cumulative Acquisition Value Equity, Cumulative Acquisition Value 5.875% Perpetual Subordinated Capital Securities [Member] 5.875% Perpetual Subordinated Capital Securities Comprehensive Income, Attributable To Preference Equity Owners Of Parent Comprehensive Income, Attributable To Preference Equity Owners Of Parent 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 6.875% Perpetual Subordinated Capital Securities [Member] 6.875% Perpetual Subordinated Capital Securities Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Net Cash Inflow (Outflow) From Disposal Of Customer And Loan Portfolios Gain (Loss) Net Monetary Positions, Hyperinflation Effect Gain (Loss) Net Monetary Positions, Hyperinflation Effect Cash Collateral And Net Settlement Accounts Cash Collateral And Net Settlement Accounts Other provisions Revenue and other operating income Cash flows from (used in) investing activities Liabilities Arising From Insurance Contracts, Gross Liabilities Arising From Insurance Contracts, Gross 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 Reduction of issued capital 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 Adjustments For Decrease (Increase) In Loans And Advances To Bank And Customers Adjustments For Decrease (Increase) In Loans And Advances To Bank And Customers Loans And Advances To Banks Of One Month Or Less Loans And Advances To Banks Of One Month Or Less 5.2% Perpetual Subordinated Capital Securities [Member] 5.2% Perpetual Subordinated Capital Securities Hsbc France [Member] Hsbc France Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent Comprehensive Income, Attributable To Ordinary Equity Owners Of Parent 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 Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income Cash flows from (used in) financing activities