1001 - Document - Cover Page link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:definitionLink link:calculationLink 1005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:definitionLink link:calculationLink 1006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 1008 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY link:presentationLink link:definitionLink link:calculationLink 1009 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 999001 - Disclosure - Bank overview link:presentationLink link:definitionLink link:calculationLink 999002 - Disclosure - Summary of significant accounting policies link:presentationLink link:definitionLink link:calculationLink 999003 - Disclosure - Business Combination link:presentationLink link:definitionLink link:calculationLink 999004 - Disclosure - Cash and due from banks, and restricted cash link:presentationLink link:definitionLink link:calculationLink 999005 - Disclosure - Investments link:presentationLink link:definitionLink link:calculationLink 999006 - Disclosure - Credit substitutes link:presentationLink link:definitionLink link:calculationLink 999007 - Disclosure - Repurchase and resell agreements link:presentationLink link:definitionLink link:calculationLink 999008 - Disclosure - Loans link:presentationLink link:definitionLink link:calculationLink 999009 - Disclosure - Sales/transfer of receivables link:presentationLink link:definitionLink link:calculationLink 999010 - Disclosure - Concentrations of credit risk link:presentationLink link:definitionLink link:calculationLink 999011 - Disclosure - Property and equipment link:presentationLink link:definitionLink link:calculationLink 999012 - Disclosure - Goodwill and Intangible assets link:presentationLink link:definitionLink link:calculationLink 999013 - Disclosure - Other assets link:presentationLink link:definitionLink link:calculationLink 999014 - Disclosure - Deposits link:presentationLink link:definitionLink link:calculationLink 999015 - Disclosure - Short-term borrowings link:presentationLink link:definitionLink link:calculationLink 999016 - Disclosure - Long-term debt link:presentationLink link:definitionLink link:calculationLink 999017 - Disclosure - Accrued expenses and other liabilities link:presentationLink link:definitionLink link:calculationLink 999018 - Disclosure - Accumulated other comprehensive income link:presentationLink link:definitionLink link:calculationLink 999019 - Disclosure - Insurance services link:presentationLink link:definitionLink link:calculationLink 999020 - Disclosure - Non-interest revenue link:presentationLink link:definitionLink link:calculationLink 999021 - Disclosure - Income taxes link:presentationLink link:definitionLink link:calculationLink 999022 - Disclosure - Stock link:presentationLink link:definitionLink link:calculationLink 999023 - Disclosure - Retirement benefits link:presentationLink link:definitionLink link:calculationLink 999024 - Disclosure - Financial instruments link:presentationLink link:definitionLink link:calculationLink 999025 - Disclosure - Estimated fair value of financial instruments link:presentationLink link:definitionLink link:calculationLink 999026 - Disclosure - Segment information link:presentationLink link:definitionLink link:calculationLink 999027 - Disclosure - Commitments and contingencies link:presentationLink link:definitionLink link:calculationLink 999028 - Disclosure - Related party transactions link:presentationLink link:definitionLink link:calculationLink 999029 - Disclosure - Earnings per equity share link:presentationLink link:definitionLink link:calculationLink 999030 - Disclosure - Subsidiaries and Affiliates link:presentationLink link:definitionLink link:calculationLink 999031 - Disclosure - Fair value measurement link:presentationLink link:definitionLink link:calculationLink 999032 - Disclosure - Risk and uncertainties link:presentationLink link:definitionLink link:calculationLink 999033 - Disclosure - Subsequent events link:presentationLink link:definitionLink link:calculationLink 999034 - Disclosure - Summary of significant accounting policies (Policies) link:presentationLink link:definitionLink link:calculationLink 999035 - Disclosure - Summary of significant accounting policies (Tables) link:presentationLink link:definitionLink link:calculationLink 999036 - Disclosure - Business Combination (Tables) link:presentationLink link:definitionLink link:calculationLink 999037 - Disclosure - Investments (Tables) link:presentationLink link:definitionLink link:calculationLink 999038 - Disclosure - Credit substitutes (Tables) link:presentationLink link:definitionLink link:calculationLink 999039 - Disclosure - Loans (Tables) link:presentationLink link:definitionLink link:calculationLink 999040 - Disclosure - Sales/transfer of receivables (Tables) link:presentationLink link:definitionLink link:calculationLink 999041 - Disclosure - Concentrations of credit risk (Tables) link:presentationLink link:definitionLink link:calculationLink 999042 - Disclosure - Property and equipment (Tables) link:presentationLink link:definitionLink link:calculationLink 999043 - Disclosure - Goodwill and Intangible assets (Tables) link:presentationLink link:definitionLink link:calculationLink 999044 - Disclosure - Other assets (Tables) link:presentationLink link:definitionLink link:calculationLink 999045 - Disclosure - Deposits (Tables) link:presentationLink link:definitionLink link:calculationLink 999046 - Disclosure - Short-term borrowings (Tables) link:presentationLink link:definitionLink link:calculationLink 999047 - Disclosure - Long-term debt (Tables) link:presentationLink link:definitionLink link:calculationLink 999048 - Disclosure - Accrued expenses and other liabilities (Tables) link:presentationLink link:definitionLink link:calculationLink 999049 - Disclosure - Accumulated other comprehensive income (Tables) link:presentationLink link:definitionLink link:calculationLink 999050 - Disclosure - Insurance services (Tables) link:presentationLink link:definitionLink link:calculationLink 999051 - Disclosure - Non-interest revenue (Tables) link:presentationLink link:definitionLink link:calculationLink 999052 - Disclosure - Income taxes (Tables) link:presentationLink link:definitionLink link:calculationLink 999053 - Disclosure - Stock (Tables) link:presentationLink link:definitionLink link:calculationLink 999054 - Disclosure - Retirement benefits (Tables) link:presentationLink link:definitionLink link:calculationLink 999055 - Disclosure - Financial instruments (Tables) link:presentationLink link:definitionLink link:calculationLink 999056 - Disclosure - Estimated fair value of financial instruments (Tables) link:presentationLink link:definitionLink link:calculationLink 999057 - Disclosure - Segment information (Tables) link:presentationLink link:definitionLink link:calculationLink 999058 - Disclosure - Commitments and contingencies (Tables) link:presentationLink link:definitionLink link:calculationLink 999059 - Disclosure - Related party transactions (Tables) link:presentationLink link:definitionLink link:calculationLink 999060 - Disclosure - Earnings per equity share (Tables) link:presentationLink link:definitionLink link:calculationLink 999061 - Disclosure - Subsidiaries and Affiliates (Tables) link:presentationLink link:definitionLink link:calculationLink 999062 - Disclosure - Fair value measurement (Tables) link:presentationLink link:definitionLink link:calculationLink 999063 - Disclosure - Bank Overview - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999064 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999065 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment Depreciation Rate Over Estimated Useful Lives of Property and Equipment on Straight-Line Basis (Detail) link:presentationLink link:definitionLink link:calculationLink 999066 - Disclosure - Summary of Significant Accounting Policies - Schedule of Intangible Assets And Basis Of Amortization (Detail) link:presentationLink link:definitionLink link:calculationLink 999067 - Disclosure - Business Combination - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999068 - Disclosure - Business Combination - Asset Acquired Liabilities Assumed in Business Combination (Detail) link:presentationLink link:definitionLink link:calculationLink 999069 - Disclosure - Business Combination - Asset Acquired Liabilities Assumed in Business Combination (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999070 - Disclosure - Business Combination - Goodwill Recorded as a Result of the Acquisition to the Bank's Reportable Segments (Detail) link:presentationLink link:definitionLink link:calculationLink 999071 - Disclosure - Business Combination - Major classess of Identifiable Acquired Intangible Assets and Estimated Period of Amortisation (Detail) link:presentationLink link:definitionLink link:calculationLink 999072 - Disclosure - Business Combination - Details of PCD of EHDFC (Detail) link:presentationLink link:definitionLink link:calculationLink 999073 - Disclosure - Business Combination - Details of Pre-Existing Relationship Between HDFC Bank Group ("the Bank and its Subsidiaries") and eHDFC Group (Detail) link:presentationLink link:definitionLink link:calculationLink 999074 - Disclosure - Cash and Due From Banks, and Restricted Cash - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999075 - Disclosure - Investments, held for trading - Portfolio of Trading Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999076 - Disclosure - Investments, AFS debt securities - Portfolio of AFS Debt Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999077 - Disclosure - Investments, AFS debt securities - Investments, Available for Sale Debt Securities - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999078 - Disclosure - Investments, AFS debt securities - Gross Unrealized Losses and Fair Value of Available for Sale Debt Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999079 - Disclosure - Investments, AFS debt securities - Contractual Residual Maturity of Available for Sale Debt Securities Other Than Asset and Mortgage Backed Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999080 - Disclosure - Investments, AFS debt securities - Contractual Residual Maturity of Available for Sale Mortgage-Backed and Asset-Backed Debt Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999081 - Disclosure - Investments, AFS debt securities - Gross Realized Gains and Gross Realized Losses from Sales of Available for Sale Debt Securities and Dividends and Interest on Such Securities (Detail) link:presentationLink link:definitionLink link:calculationLink 999082 - Disclosure - Credit substitutes - Fair Value of Credit Substitutes by Type of Instrument (Detail) link:presentationLink link:definitionLink link:calculationLink 999083 - Disclosure - Credit substitutes - Fair Value of Credit Substitutes for Non-Performing Credit Substitutes (Detail) link:presentationLink link:definitionLink link:calculationLink 999084 - Disclosure - Repurchase and Resell Agreements - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999085 - Disclosure - Loans - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999086 - Disclosure - Loans - Loans by Facility (Detail) link:presentationLink link:definitionLink link:calculationLink 999087 - Disclosure - Loans - Maturity of Gross Loans (Detail) link:presentationLink link:definitionLink link:calculationLink 999088 - Disclosure - Loans - Loan Delinquency and Non-Accrual Loans (Detail) link:presentationLink link:definitionLink link:calculationLink 999089 - Disclosure - Loans - Loan Delinquency and Non-Accrual Loans (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999090 - Disclosure - Loans - Summary of Gross Loans Origination and Internally Assigned Credit Risk Ratings (Detail) link:presentationLink link:definitionLink link:calculationLink 999091 - Disclosure - Loans - Non-performing Loans (Detail) link:presentationLink link:definitionLink link:calculationLink 999092 - Disclosure - Loans - Summary Information Relating to Non-performing Loans (Detail) Loans (Detail) link:presentationLink link:definitionLink link:calculationLink 999093 - Disclosure - Loans - Allowance for Credit Losses (Detail) link:presentationLink link:definitionLink link:calculationLink 999094 - Disclosure - Loans - Allowance for Credit Losses (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999095 - Disclosure - Loans - Interest on Loans by Facility (Detail) link:presentationLink link:definitionLink link:calculationLink 999096 - Disclosure - Sales/transfer of receivables - Summary of Cash Flows Between Transferee and Transferor (Detail) link:presentationLink link:definitionLink link:calculationLink 999097 - Disclosure - Sales/transfer of receivables - Summary of Fair Value of Retained Interests in Finance Receivables (Detail) link:presentationLink link:definitionLink link:calculationLink 999098 - Disclosure - Sales/transfer of receivables - Summary of Variable Interest Entity Not Primary Beneficiary Disclosures (Detail) link:presentationLink link:definitionLink link:calculationLink 999099 - Disclosure - Sales/transfer of receivables - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999100 - Disclosure - Concentrations of Credit Risk (Detail) link:presentationLink link:definitionLink link:calculationLink 999101 - Disclosure - Concentrations of credit risk - Exposures to Ten Largest Borrowers Computed as per RBI Guidelines, Based on Higher of Outstanding Balance or Limit on Loans, Investments (Including Credit Substitutes) and Non-Funded Exposures (Detail) link:presentationLink link:definitionLink link:calculationLink 999102 - Disclosure - Property and Equipment - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999103 - Disclosure - Property and Equipment - Property and Equipment by Asset Category (Detail) link:presentationLink link:definitionLink link:calculationLink 999104 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999105 - Disclosure - Goodwill and Intangible assets - Carrying Amount of Goodwill (Detail) link:presentationLink link:definitionLink link:calculationLink 999106 - Disclosure - Goodwill and Intangible assets - Intangible Assets, Net (Detail) link:presentationLink link:definitionLink link:calculationLink 999107 - Disclosure - Goodwill and Intangible assets - Intangible Assets, Net (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999108 - Disclosure - Goodwill and Intangible assets - Future Amortization of Finite Lived Intangible Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999109 - Disclosure - Other Assets - Other Assets Disclosure (Detail) link:presentationLink link:definitionLink link:calculationLink 999110 - Disclosure - Other Assets - Other Assets Disclosure (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999111 - Disclosure - Deposits - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999112 - Disclosure - Deposits (Detail) link:presentationLink link:definitionLink link:calculationLink 999113 - Disclosure - Deposits - Scheduled Maturities for Total Time Deposits (Detail) link:presentationLink link:definitionLink link:calculationLink 999114 - Disclosure - Short-Term Borrowings (Detail) link:presentationLink link:definitionLink link:calculationLink 999115 - Disclosure - Long-Term Debt - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999116 - Disclosure - Long-Term Debt (Detail) link:presentationLink link:definitionLink link:calculationLink 999117 - Disclosure - Long-term debt - Long-Term Debt and Related Contractual Rates and Maturity Dates (Detail) link:presentationLink link:definitionLink link:calculationLink 999118 - Disclosure - Long-Term Debt - Scheduled Maturities of Long-Term Debt (Detail) link:presentationLink link:definitionLink link:calculationLink 999119 - Disclosure - Long-Term Debt - Scheduled Maturities of Long-Term Debt (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999120 - Disclosure - Accrued Expenses and Other Liabilities - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999121 - Disclosure - Accrued Expenses and Other Liabilities (Detail) link:presentationLink link:definitionLink link:calculationLink 999122 - Disclosure - Accumulated other comprehensive income - Changes in Accumulated Other Comprehensive Income After Tax (Detail) link:presentationLink link:definitionLink link:calculationLink 999123 - Disclosure - Accumulated other comprehensive income - Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect (Detail) link:presentationLink link:definitionLink link:calculationLink 999124 - Disclosure - Insurance services - Summary of Balances of and Changes in Separate Account Liabilities (Detail) link:presentationLink link:definitionLink link:calculationLink 999125 - Disclosure - Insurance services - Summary of Bank's Aggregate Fair Value of Assets, by Major Investment Asset Category, Supporting Separate Accounts Liabilities (Detail) link:presentationLink link:definitionLink link:calculationLink 999126 - Disclosure - Insurance services - Summary of Bank's liabilities on Policies in Force on the Consolidated Balance Sheet (Detail) link:presentationLink link:definitionLink link:calculationLink 999127 - Disclosure - Insurance services - Summary of Bank's Liability for Future Policy Benefits on the Consolidated Balance Sheets (Detail) link:presentationLink link:definitionLink link:calculationLink 999128 - Disclosure - Insurance services - Summary of Information About the Direct and Assumed Liability for Future Policy Benefits (Detail) link:presentationLink link:definitionLink link:calculationLink 999129 - Disclosure - Insurance services - Summary of Bank's Gross Premiums or Assessments and Interest Expense Recognised (Detail) link:presentationLink link:definitionLink link:calculationLink 999130 - Disclosure - Insurance services - Summary of the Bank's Policyholder Account Balances on the Consolidated Balance (Detail) link:presentationLink link:definitionLink link:calculationLink 999131 - Disclosure - Insurance services - Summary of a Roll Forward of URR (Detail) link:presentationLink link:definitionLink link:calculationLink 999132 - Disclosure - Insurance services - Summary of Bank Maintains a Number of Reinsurance Treaties with Third Parties (Detail) link:presentationLink link:definitionLink link:calculationLink 999133 - Disclosure - Insurance services - Summary of Effect of Reinsurance (Detail) link:presentationLink link:definitionLink link:calculationLink 999134 - Disclosure - Insurance services - Summary of Information Regarding Total DAC by Line of Business (Detail) link:presentationLink link:definitionLink link:calculationLink 999135 - Disclosure - Insurance services - Summary of Information Regarding Movement of Total VOBA Contracts (Detail) link:presentationLink link:definitionLink link:calculationLink 999136 - Disclosure - Insurance services - Summary of Information Regarding the Estimated Future Amortisation of VOBA Intangibles Over the Next Five Years (Detail) link:presentationLink link:definitionLink link:calculationLink 999137 - Disclosure - Non-interest revenue - Summary of Disaggregation of Revenue (Detail) link:presentationLink link:definitionLink link:calculationLink 999138 - Disclosure - Non-interest revenue - Summary of Disaggregation of Revenue from Business Segments (Detail) link:presentationLink link:definitionLink link:calculationLink 999139 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999140 - Disclosure - Income Tax Expense (Detail) link:presentationLink link:definitionLink link:calculationLink 999141 - Disclosure - Income Taxes - Reconciliation of Income Taxes at Indian Statutory Income Tax Rate to Income Tax Expense as Reported (Detail) link:presentationLink link:definitionLink link:calculationLink 999142 - Disclosure - Income Taxes - Tax Effects of Significant Temporary Differences (Detail) link:presentationLink link:definitionLink link:calculationLink 999143 - Disclosure - Income Taxes - Tax Effects of Significant Temporary Differences (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999144 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits (Detail) link:presentationLink link:definitionLink link:calculationLink 999145 - Disclosure - Stock - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999146 - Disclosure - Stock - Estimated Fair Value of Options on Dates of Each Grant Using Binomial Option Pricing Model (Detail) link:presentationLink link:definitionLink link:calculationLink 999147 - Disclosure - Stock - Estimated Fair Value of Restricted Stock Units on Dates of Each Grant Using Binomial Option Pricing Model (Detail) link:presentationLink link:definitionLink link:calculationLink 999148 - Disclosure - Stock - Activity in Options Available to be Granted Under Employee Stock Option Scheme (Detail) link:presentationLink link:definitionLink link:calculationLink 999149 - Disclosure - Stock - Summary Of Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) link:presentationLink link:definitionLink link:calculationLink 999150 - Disclosure - Stock - Activity in Options Outstanding under Employee Stock Option Scheme, Employees Stock Option Schemes (Detail) link:presentationLink link:definitionLink link:calculationLink 999151 - Disclosure - Stock - Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) link:presentationLink link:definitionLink link:calculationLink 999152 - Disclosure - Stock - Stock Options Outstanding, Employees Stock Option Schemes (Detail) link:presentationLink link:definitionLink link:calculationLink 999153 - Disclosure - Stock - RSUs outstanding, Employees Stock Incentive Master Scheme (Detail) link:presentationLink link:definitionLink link:calculationLink 999154 - Disclosure - Stock - RSUs outstanding, Employees Stock Incentive Master Scheme (Parenthetical) (Detail) link:presentationLink link:definitionLink link:calculationLink 999155 - Disclosure - Retirement Benefits - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999156 - Disclosure - Retirement benefits - Funded Status of Gratuity Plan and Amounts Recognized in Bank's Financial Statements (Detail) link:presentationLink link:definitionLink link:calculationLink 999157 - Disclosure - Retirement benefits - Net Gratuity Cost (Detail) link:presentationLink link:definitionLink link:calculationLink 999158 - Disclosure - Retirement benefits - Assumptions Used in Accounting for Gratuity Plan (Detail) link:presentationLink link:definitionLink link:calculationLink 999159 - Disclosure - Retirement benefits - Benefit Payments, Gratuity (Detail) link:presentationLink link:definitionLink link:calculationLink 999160 - Disclosure - Retirement benefits - Plan Assets as Percentage of Total Funds (Detail) link:presentationLink link:definitionLink link:calculationLink 999161 - Disclosure - Retirement benefits - Funded Status of Pension Plan and Amounts Recognized in Bank's Financial Statements (Detail) link:presentationLink link:definitionLink link:calculationLink 999162 - Disclosure - Retirement benefits - Net Pension Cost (Detail) link:presentationLink link:definitionLink link:calculationLink 999163 - Disclosure - Retirement benefits - Assumptions Used in Accounting for Pension Plan (Detail) link:presentationLink link:definitionLink link:calculationLink 999164 - Disclosure - Retirement benefits - Benefit Payments, Pension (Detail) link:presentationLink link:definitionLink link:calculationLink 999165 - Disclosure - Retirement benefits - Weighted-Average Asset Allocation of Said Plan Assets for Pension Benefits (Detail) link:presentationLink link:definitionLink link:calculationLink 999166 - Disclosure - Retirement benefits - Plan Investment Assets for Gratuity Funds and Pension Fund Measured at Fair Value by Level and in Total (Detail) link:presentationLink link:definitionLink link:calculationLink 999167 - Disclosure - Retirement benefits - Reconciliation of All Plan Investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) link:presentationLink link:definitionLink link:calculationLink 999168 - Disclosure - Financial instruments - Aggregate Notional Principal Amounts of Bank's Outstanding Forward Exchange and Derivative Contracts (Detail) link:presentationLink link:definitionLink link:calculationLink 999169 - Disclosure - Financial Instruments - Information Related to Derivative Amounts Recognized in Income (Detail) link:presentationLink link:definitionLink link:calculationLink 999170 - Disclosure - Financial Instruments - Amounts Subject to Enforceable Netting Arrangements (Detail) link:presentationLink link:definitionLink link:calculationLink 999171 - Disclosure - Financial Instruments - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999172 - Disclosure - Financial Instruments - Details of Guarantees and Documentary Credits Outstanding (Detail) link:presentationLink link:definitionLink link:calculationLink 999173 - Disclosure - Financial Instruments - Summary of allowance for Credit Losses included in accrued expenses and other liabilities on Off-Balance sheet credit exposures and undrawn commitments (Detail) link:presentationLink link:definitionLink link:calculationLink 999174 - Disclosure - Estimated fair value of financial instruments - Comparison of Fair Value and Carrying Value of Financial Instruments (Detail) link:presentationLink link:definitionLink link:calculationLink 999175 - Disclosure - Segment Information - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999176 - Disclosure - Segment Information - Summarized Segment Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999177 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999178 - Disclosure - Commitments and Contingencies - Summary Of Operating Lease Right Of Use Assets And Lease Liability (Detail) link:presentationLink link:definitionLink link:calculationLink 999179 - Disclosure - Commitments and Contingencies - Rental Expenses and Sub-Lease Income (Detail) link:presentationLink link:definitionLink link:calculationLink 999180 - Disclosure - Commitments and Contingencies - Future Minimum Lease Payments (Detail) link:presentationLink link:definitionLink link:calculationLink 999181 - Disclosure - Commitments and Contingencies - Movement in Provision for Credit Card and Debit Card Reward Points (Detail) link:presentationLink link:definitionLink link:calculationLink 999182 - Disclosure - Related party transactions - Balances Payable to Related Parties (Detail) link:presentationLink link:definitionLink link:calculationLink 999183 - Disclosure - Related party transactions - Balances Receivable from Related Parties (Detail) link:presentationLink link:definitionLink link:calculationLink 999184 - Disclosure - Related Party Transactions - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999185 - Disclosure - Related Party Transactions - Significant Transactions with Related Parties Included in Determination of Net Income (Detail) link:presentationLink link:definitionLink link:calculationLink 999186 - Disclosure - Earnings Per Equity Share - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999187 - Disclosure - Earnings per equity share - Weighted Average Number of Equity Shares Used in Computing Earnings Per Equity Share (Detail) link:presentationLink link:definitionLink link:calculationLink 999188 - Disclosure - Earnings per equity share - Reconciliations of Basic and Diluted Earnings Per Equity Share and Earnings per American Depositary Shares (Detail) link:presentationLink link:definitionLink link:calculationLink 999189 - Disclosure - Subsidiaries and Affiliates - List of Subsidiaries (Detail) link:presentationLink link:definitionLink link:calculationLink 999190 - Disclosure - Subsidiaries and Affiliates - List of Affiliates (Detail) link:presentationLink link:definitionLink link:calculationLink 999191 - Disclosure - Fair value measurement - Investments Measured at Fair Value on Recurring Basis (Detail) link:presentationLink link:definitionLink link:calculationLink 999192 - Disclosure - Fair value measurement - Information about Changes in Fair Value of Level 3 Assets (Detail) link:presentationLink link:definitionLink link:calculationLink 999193 - Disclosure - Fair value measurement - Derivative Instruments Measured at Fair Value on Recurring Basis (Detail) link:presentationLink link:definitionLink link:calculationLink 999194 - Disclosure - Fair Value Measurement - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999195 - Disclosure - Subsequent events - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 999196 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure link:presentationLink link:definitionLink link:calculationLink 1010 - Statement - Commitments and Contingencies - Future Minimum Lease Payments (Detail) Alternate 1 link:presentationLink link:definitionLink link:calculationLink Cover [Abstract] Document Information [Table] Entity Addresses, Address Type [Axis] Address Type [Domain] Business Contact [Member] Business Contact [Member] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Interactive Data Current Entity Interactive Data Current Document Annual Report Document Annual Report Document Transition Report Document Transition Report Document Shell Company Report Document Shell Company Report Title of 12(b) Security Title of 12(b) Security Security Exchange Name Security Exchange Name Entity Shell Company Entity Shell Company Entity Emerging Growth Company Entity Emerging Growth Company Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Registration Statement Document Registration Statement Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, Country Entity Address, Country Entity Address, Postal Zip Code Entity Address, Postal Zip Code Contact Personnel Name Contact Personnel Name Contact Personnel Email Address Contact Personnel Email Address City Area Code City Area Code Local Phone Number Local Phone Number Country Region Country Region ICFR Auditor Attestation Flag Auditor Name Auditor Firm ID Auditor Location Document Financial Statement Error Correction [Flag] Document Accounting Standard Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Statement [Line Items] Statement [Line Items] Assets [Abstract] ASSETS: Assets: Segment assets: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash and due from banks, and restricted cash Cash and due from banks, and restricted cash, beginning of year Cash and due from banks, and restricted cash, end of year Cash and due from banks, and restricted cash Debt Securities, Trading, and Equity Securities, FV-NI Investments held for trading, at fair value Fair Value Investments held for trading Trading account securities Debt Securities, Available-for-Sale Investments available for sale debt securities, at fair value (includes restricted investments of Rs. 3,936,248.0 and Rs. 2,971,980.0 (US$ 31,674.1), as of March 31, 2025 and March 31, 2026, respectively) Fair Value Total Total Investments available for sale debt securities Securities Available-for-Sale Securities Purchased under Agreements to Resell, Gross Securities purchased under agreements to resell Securities purchased under agreements to resell, gross amounts Interest Receivable Accrued interest receivable Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Total intangible assets, net Goodwill Goodwill Goodwill Beginning Ending Other assets Other assets Total Assets Total assets Assets Assets Segment total assets Separate Account Asset Separate account assets Separate Account Assets Loans Receivable Excluding Accrued Interest Not Due After Allowance For Credit Loss Loans (net of allowance of Rs. 535,829.3 and Rs. 594,308.9 (US$ 6,333.8), as of March 31, 2025 and March 31, 2026, respectively) Loans Amount of loans receivable excluding accrued interest not due after allowance for credit loss. Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY: Liabilities [Abstract] Liabilities: Liabilities: Interest-bearing Deposit Liabilities Interest-bearing deposits Total interest-bearing deposits Balances in interest-bearing deposits Noninterest-bearing Deposit Liabilities Non-interest-bearing deposits Non-interest-bearing deposits Balances in non-interest-bearing deposits Deposits Total deposits Total Securities Sold under Agreements to Repurchase, Gross Securities sold under repurchase agreements Securities sold under repurchase agreements, amount outstanding Securities sold under repurchase agreements, gross amounts Short-term Debt Short-term borrowings Interest Payable Accrued interest payable Long-term Debt Long-term debt Total Total Long-term debt Accrued expenses and other liabilities Accrued expenses and other liabilities Total Accrued expenses and other liabilities Liabilities Total liabilities Liabilities Liabilities Separate Account, Liability Separate account liabilities Beginning Balance Ending Balance Liabilities On Policies In Force Liabilities on policies in force Total Amount of liabilities recorded for insurance contract written. Undistributed Policy Holders Earnings Account Undistributed policy holders earnings account Undistributed policy holders earnings account. Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Shareholders' equity: Common Stock, Value, Outstanding Equity shares: par value Rs. 1.0 each; authorized 20,000,000,000 shares and 20,000,000,000 shares; issued 15,304,443,348 shares and 15,393,368,328 shares, as of March 31, 2025 and March 31, 2026, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings, Unappropriated Retained earnings Retained Earnings, Appropriated Statutory reserve Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income/ (loss) Stockholders' Equity Attributable to Parent Total HDFC Bank Limited shareholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest in subsidiaries Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total shareholders' equity Balance Balance Treasury Stock, Value Treasury stock, at cost Commitments and Contingencies Commitments and contingencies (see note: 29) Liabilities and Equity Total liabilities and shareholders' equity Common Stock, Par or Stated Value Per Share Equity shares, par value Common Stock, Shares Authorized Equity shares, authorized Common Stock, Shares, Issued Equity shares, issued Common Stock, Shares, Outstanding Equity shares, outstanding Balance of shares Balance of shares Debt Securities, Available-for-Sale, Restricted Investments available for sale, at fair value, restricted investments Financing Receivable, Allowance for Credit Loss Loans, allowance Less: Allowance for credit losses Allowance for credit losses, beginning of the period Allowance for credit losses, end of the period Income Statement [Abstract] Earnings Per Share [Abstract] Per share information: (see note: 31) Earnings Per Share, Basic Earnings per equity share—basic Basic earnings per share Earnings Per Share, Diluted Earnings per equity share—diluted Diluted earnings per share Interest and Dividend Income, Operating [Abstract] Interest and dividend revenue: Interest and Fee Income, Loans and Leases Loans Interest on loans Interest Income, Debt Securities, Trading, Operating Trading securities Interest Income, Debt Securities, Available-for-sale, Operating Available for sale debt securities Dividends and interest Other Interest and Dividend Income Other Interest and Dividend Income, Operating Total interest and dividend revenue Related party transaction revenues Interest Expense [Abstract] Interest expense: Interest Expense, Deposits Deposits Interest And Dividend Income Operating Interest Expense, Short-term Borrowings Short-term borrowings Interest Expense, Long-term Debt Long-term debt Interest Expense, Other Other Interest expenses-Others Interest Expense, Operating Total interest expense Noninterest Expense [Abstract] Non-interest expense: Labor and Related Expense Salaries and staff benefits Premises And Equipment Expense Premises and equipment This element represents premises expense and equipment expense including expense towards repairs, rentals and service contracts costs. Other Depreciation and Amortization Depreciation and amortization Other General and Administrative Expense Administrative and other Amortization of Intangible Assets Amortization of intangible assets Amortization of intangible assets Finite lived intangible assets amortization Noninterest Expense Total non-interest expense Related party transaction non-interest expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income tax expense Income before income tax expense Income Tax Expense (Benefit) Income tax expense Income tax expense Less: Income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income before noncontrolling interest Net income before noncontrolling interest Net income Net Income (Loss) Attributable to Noncontrolling Interest Less: Net income attributable to shareholders of noncontrolling interest Net income attributable to shareholders of HDFC Bank Limited Claims And Benefits Paid Pertaining To Insurance Business Claims and benefits paid pertaining to insurance business Amount of claims and benefits paid and amount of change in actuarial valuation of liabilities. Transferred To Undistributed Policyholders Earnings Account (Surplus) in P&L transferred to undistributed policyholders earnings account Amount of gains or losses recognized during the reporting period on assets that were transferred to undistributed policyholders earnings account. Noninterest Income [Abstract] Non-interest revenue, net: Fees And Commission Fees and commissions Amount of fees and commissions from financial services and banking activities and correspondent clearing. including fees from credit cards, merchant discounts, and administrative fees. Trading Gain (Loss) Trading securities gain (net) Debt Securities, Available-for-Sale, Realized Gain (Loss) Realized gain/(loss) on sales of available for sale debt securities, net Net realized (gain)/ loss on sale of available for sale debt securities Realized gains/ (losses), net Realized (gain)/loss on sales of AFS debt securities, net Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange transactions gain/(loss) Gain (Loss) on Derivative Instruments, Net, Pretax Derivatives gain net Derivatives gain/(loss), net Noninterest Income, Other Operating Income Other, net Noninterest Income Total non-interest revenue, net Non-interest revenue Revenues Total revenue, net Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Allowance on available for sale debt securities Premium And Other Operating Income From The Insurance Business Premium and other operating income from the insurance business Amount of premiums, fees and charges received from insurance business. Interest Income (Expense), Net Net interest revenue Net interest income/(expense) Provision for Loan, Lease, and Other Losses Provision for credit losses Less: Provision for credit losses Interest Income (Expense), after Provision for Loan Loss Net interest revenue after provision for credit losses Earnings Per Share Basic And Diluted American Depository Shares [Abstract] Per ADS information (where 1 ADS represents 3 shares): (see note: 31) Common Stock, Dividends, Per Share, Declared Dividends declared per equity share Earnings Per Share, ADS Basic Earnings per ADS—basic Basic earnings per share The amount of net income or loss for the period per each share of American Depository Receipts outstanding during the reporting period. Earnings Per Share, ADS Diluted Earnings per ADS—diluted Diluted earnings per share The amount of net income or loss for the period per each share of American Depository Receipts and dilutive common stock equivalents outstanding during the reporting period. Statement of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract] Available for sale debt securities: Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Net unrealized gain (loss) arising during the period (net of tax Rs. (15,898.7), Rs. (37,208.6), and Rs. 65,830.7  (US$ 701.6) as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Reclassification adjustment for net (gain) loss included in net income (net of tax Rs. (1,675.7), Rs. (3,582.9), and Rs. 13,887.4 (US$ 148.0) as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract] Foreign currency translation adjustment: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Net unrealized gain (loss) arising during the period (net of tax Rs. (254.2), Rs. (491.6) and Rs. (2,771.9) (US$ (29.5)), as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive Income (Loss), Net of Tax Other comprehensive income, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: Comprehensive income attributable to shareholders of noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to shareholders of HDFC Bank Limited OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment, after Tax Long-duration insurance contract discount rate change: Net unrealized gain (loss) arising during the period (net of tax nil, Rs.  13,677.7 and Rs. (26,821.0) (US$ (285.8)), as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive Income Transferred To Undistributed Policyholders Earnings Account (Surplus)/ Deficit in OCI transferred to undistributed policy holders earnings account: Net unrealized gain (loss) arising during the period (net of tax nil, Rs. (4,237.2) and Rs. 1,966.0 (US$ 21.0), as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Amount of other comprehensive income gains or losses recognized during the reporting period on assets that were transferred to undistributed policyholders earnings account. Comprehensive Income Net Of Tax Including Attributable To Non Controlling Interest Total comprehensive income Comprehensive income net of tax including attributable to non controlling interest. Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Past service cost on plan amendment Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax Past service cost arising during the period (net of tax nil, nil and Rs.  2,319.0 (US$ 24.7) as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax Amortization of past service cost to Net periodic cost (net of tax nil, nil and (277.0) (US$ 3.0) as of March 31, 2024, March 31, 2025 and March 31, 2026, respectively) Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax Net unrealized gain (loss) arising during the period, tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Net unrealized gain (loss) arising during the period, tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Reclassification adjustment for net (gain) loss included in net income, tax OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment, Tax Net unrealized gain (loss) arising during the period OCI, Equity Method Investment, Tax Net unrealized gain (loss) arising during the period Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax Past service cost arising during the period Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax Amortisation of past service cost to Net periodic cost Statement of Cash Flows [Abstract] Supplemental Cash Flow Elements [Abstract] Non-cash investment activities Capital Expenditures Incurred but Not yet Paid Payable for purchase of property and equipment Trade Date Sale Receivable Of Available For Sale Investment Securities Trade date sale receivable of available for sale debt securities Trade date sale receivable of available for sale investment securities. Lessee, Operating Lease, Description Operating lease right-of-use assets Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Increase (Decrease) in Deposits Net increase in deposits Proceeds from (Repayments of) Short-term Debt Net increase/(decrease) in short-term borrowings Proceeds from Noncontrolling Interests Proceeds from issue of shares by a subsidiary to noncontrolling interests Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Proceeds from issuance of long-term debt Repayments of Long-term Debt Repayment of long-term debt Payments of Dividends Payment of dividends Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Proceeds from Stock Options Exercised Proceeds from issuance of equity shares for options and warrants exercised Payment Of Share From Minority Shareholders Purchase of shares from Noncontrolling interests Payment of share from minority shareholders. Proceeds From Sale Of Subsidiary Stock To Minority Shareholders Sale of subsidiary stock to non-controlling interests Proceeds from sale of subsidiary stock to minority shareholders. Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Proceeds from Sale and Maturity of Debt Securities, Available-for-sale [Abstract] Activity in available for sale debt securities: Payments to Acquire Debt Securities, Available-for-sale Purchases Proceeds from Sale of Debt Securities, Available-for-sale Proceeds from sales Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Maturities, prepayments and calls Payments to Acquire Loans Receivable Loans purchased Proceeds from Principal Repayments on Loans and Leases Held-for-investment Repayments on loans purchased Payments to Acquire Property, Plant, and Equipment Additions to property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale or disposal of property and equipment Proceeds from Payments for Equity Securities Activity in equity securities, net Proceeds from payments for equity securities. Payments for (Proceeds from) Other Loans and Leases Increase in loans originated, net of principal collections Proceeds from (Payments for) Federal Funds Sold and Securities Purchased under Agreements to Resell, Net Net change in repurchase agreements and reverse repurchase agreements Proceeds from Sales of Business, Affiliate and Productive Assets Proceeds from disposals of business Cash Acquired from Acquisition Net cash received on acquisition of HDFC Limited Proceeds from Securitizations of Consumer Loans Proceeds from loans securitized Net Change In Term Placements Term placements, net Net change related to the placements with banks and financial institutions having original maturities for periods > 90 days. Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustment to reconcile net income to net cash provided by operating activities Amortization of Deferred Sales Commissions Amortization of deferred customer acquisition costs and fees Accretion (Amortization) of Discounts and Premiums, Investments Amortization of premium/(discount) on investments Allowance For Credit Loss Debt Securities Available For Sale Allowance on available for sale debt securities Allowance for credit loss on investment in debt security measured at fair value. Deferred Income Tax Expense (Benefit) Deferred tax expense/ (benefit) Deferred tax expense/ (benefit) Gain (Loss) on Disposition of Other Assets Other gains, net Share-based Payment Arrangement, Noncash Expense, Total Share-based compensation expense Gain (Loss) on Disposition of Property Plant Equipment (Gain)/ loss on disposal of property and equipment, net Foreign Currency Transaction Gain (Loss), Unrealized Unrealized exchange (gain)/ loss Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of past service cost Past service cost amortized Increase (Decrease) in Operating Capital [Abstract] Net change in: Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Investments held for trading Increase (Decrease) in Accrued Interest Receivable, Net Accrued interest receivable Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Interest Payable, Net Accrued interest payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expense and other liabilities Increase (Decrease) in Other Policyholder Funds Policyholder's account balances Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Supplemental Cash Flow Information [Abstract] Supplementary cash flow information: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Income Taxes Paid, Net Income taxes paid, net of refunds Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of exchange rate changes on cash and due from banks, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net change in cash and due from banks, and restricted cash Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Equity Shares Additional Paid-in Capital [Member] Additional Paid in Capital Retained Earnings [Member] Retained Earnings Retained Earnings, Appropriated [Member] Statutory Reserve AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income/ (Loss) Accumulated Other Comprehensive Income (Loss) Parent [Member] Total HDFC Bank Limited Shareholders' Equity Noncontrolling Interest [Member] Noncontrolling Interest Treasury Stock, Common [Member] Treasury stock at cost Stock Issued During Period, Value, Stock Options Exercised Shares issued upon exercise of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Shares issued upon exercise of options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Share-based compensation Dividends, Common Stock Dividends Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net Change in ownership interest in subsidiary Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests Shares issued to noncontrolling interest Transfers To Statutory Reserve Transfer to statutory reserve Transfers to statutory reserve in terms of local regulations. Net Change In Accumulated Other Comprehensive Income Net change in accumulated other comprehensive income Net change in accumulated other comprehensive income. Stock Issued During Period, Value, Acquisitions Shares issued on account of Business Combination (net) Shares Issued Upon Exercise Of Equity Warrant Shares issued upon exercise of equity warrants Share issued upon exercise of equity warrant. Stock Issued During Period, Shares, Acquisitions Shares issued on account of Business Combination (net) (in shares) Stock Issued Upon Exercise Of Equity Warrant Shares Shares issued upon exercise of equity warrant (in shares) Stock issued upon exercise of equity warrants, shares. Stock Issued Upon Exercise Of Warrants And Options Purchase Consideration Purchase consideration towards warrants & options eHDFC Stock issued upon exercise of warrants and options purchase consideration. Stocks Repurchased During Period Value Treasury stock Stocks repurchased during period value. Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Purchase of subsidiary shares from noncontrolling interest Sale Of Subsidiary Stock To Non Controlling Interests Sale of subsidiary stock to non-controlling interests Sale of subsidiary stock to non-controlling interests. Revision of Prior Period [Axis] Revision of Prior Period [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Housing Development Finance Corporation Limited [Member] Housing Development Finance Corporation Limited eHDFC [Member] Housing Development Finance Corporation Limited [Member] Shares Cancelled On Account Of Business Combination Shares cancelled on account of business combination Shares cancelled on account of business combination. Per Share Value of Shares Cancelled On Business Combination Per share value of shares cancelled on business combination Per share value of shares cancelled on business combination. Transfer To Statutory Reserve On Business Combination Transfer​ to statutory​ reserve ​on ​business​ combination. Accounting Policies [Abstract] Nature of Operations [Text Block] Bank overview Significant Accounting Policies [Text Block] Summary of significant accounting policies Business Combinations [Abstract] Business Combination Disclosure [Text Block] Business Combination Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents Disclosure [Text Block] Cash and due from banks, and restricted cash Investments, All Other Investments [Abstract] Investments All Other Investments [Table] Debt Security Category [Axis] Debt Security Category [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Available-for-sale Securities [Member] Available-for-Sale Debt Securities Held-to-maturity Securities [Member] Held-to-maturity Securities Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Trading Account Asset [Member] Held for Trading Investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Investment [Text Block] Investments Text Block [Abstract] Credit Substitutes Disclosure [Text Block] Credit substitutes Credit substitutes consists of securities that the Bank invests in as part of an overall extension of credit to certain customers. Such securities share many of the risk and reward characteristics of loans and are managed by the Bank together with other credit facilities extended to the same customers. Banking and Thrift, Interest [Abstract] Banking and Thrift, Interest [Abstract] Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Repurchase and resell agreements Receivables [Abstract] Financing Receivables [Text Block] Loans Transfers and Servicing [Abstract] Transfers and Servicing of Financial Assets [Text Block] Sales/transfer of receivables Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Concentration Risk Disclosure [Text Block] Concentrations of credit risk Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property and equipment Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Other Assets Disclosure [Text Block] Other assets Deposit Liabilities Disclosures [Text Block] Deposits Debt Disclosure [Abstract] Debt Disclosure [Abstract] Short-term Debt [Text Block] Short-term borrowings Long-term Debt [Text Block] Long-term debt Payables and Accruals [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued expenses and other liabilities Equity [Abstract] Comprehensive Income (Loss) Note [Text Block] Accumulated other comprehensive income Separate Accounts Disclosure [Abstract] Insurance Disclosure [Text Block] Insurance services Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Text Block] Non-interest revenue Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income taxes Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Text Block] Stock-based compensation Retirement Benefits [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Retirement benefits Financial Instruments Disclosure [Text Block] Financial instruments Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Estimated fair value of financial instruments Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment information Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and contingencies Related Party Transactions [Abstract] Loans purchased from principal owner Related Party Transactions Disclosure [Text Block] Related party transactions Earnings Per Share [Text Block] Earnings per equity share Investments in and Advances to Affiliates [Abstract] Investments in and Advances to Affiliates, Schedule of Investments [Text Block] Subsidiaries and Affiliates Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Fair value measurement Risk And Uncertainties [Text Block] Risk and uncertainties Risk and uncertainties. Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent events Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Consolidation, Policy [Policy Text Block] Principles of consolidation Basis of Accounting, Policy [Policy Text Block] Basis of presentation Use of Estimates, Policy [Policy Text Block] Use of estimates Cash and Cash Equivalents, Policy [Policy Text Block] Cash and due from banks, and restricted cash Commissions Expense, Policy [Policy Text Block] Customer acquisition costs Investment, Policy [Policy Text Block] Investments in securities Other-Than-Temporary Impairment [Policy Text Block] Impairment of debt securities Other-Than-Temporary Impairment, Policy [Text Block] Receivable [Policy Text Block] Loans Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Sales/transfer of receivables Property, Plant and Equipment, Policy [Policy Text Block] Property and equipment Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment or disposal of tangible long-lived assets Income Tax, Policy [Policy Text Block] Income tax Revenue [Policy Text Block] Revenue recognition Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign currency transactions Share-based Payment Arrangement [Policy Text Block] Stock-based compensation Debt, Policy [Policy Text Block] Debt issuance costs Earnings Per Share, Policy [Policy Text Block] Earnings per share Segment Reporting, Policy [Policy Text Block] Segment information Derivatives, Policy [Policy Text Block] Derivative financial instruments Business Combinations Policy [Policy Text Block] Business combination Goodwill and Intangible Assets, Policy [Policy Text Block] Goodwill New Accounting Pronouncements, Policy [Policy Text Block] Recently adopted accounting standards Description of New Accounting Pronouncements Not yet Adopted [Policy Text Block] Recently issued accounting pronouncements not yet effective Description of new accounting pronouncements not yet adopted. Convenience Translation [Policy Text Block] Convenience translation Convenience translation. Lessee, Leases [Policy Text Block] Lease accounting Industry-Specific Policies, Insurance Companies [Policy Text Block] Insurance Services Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Intangible Assets Credit Loss, Financial Instrument [Policy Text Block] Allowance for credit losses Schedule of Composite depreciation rate [Table Text Block] Schedule of Composite depreciation rate Schedule of Composite depreciation rate [Table Text Block] Schedule Of Intangible Assets [Table Text Block] Schedule of intangible assets and basis of amortization Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance, by either major class or business segment. Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Asset acquired liabilities assumed In business combination Business Combination, Segment Allocation [Table Text Block] Goodwill recorded as a result of the acquisition to the Bank's reportable segments Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Major classess of identifiable acquired intangible assets and estimated period of amortisation Disclosure of Financing Receivable Purchased With Credit Deterioration [Table Text Block] Details of PCD of eHDFC Disclosure of financing receivable purchased with credit deterioration. Disclosure in Tabular Form of Pre Existing Relationship with Acquiree and Its Subsidiaries [Table Text Block] Details of pre-existing relationship between HDFC Bank group ("the Bank and its subsidiaries") and eHDFC group Disclosure in tabular form of pre existing relationship with acquiree and its subsidiaries. Debt Securities Other Than Asset and Mortgage Backed Securities [Member] Debt securities, other than asset and mortgage-backed securities Debt Securities Other Than Asset and Mortgage Backed Securities [Member] Asset and Mortgage Backed Securities [Member] Asset and Mortgage Backed Securities Asset and Mortgage Backed Securities [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Portfolio of Trading Securities or Held for Trading Securities Amortized Cost Fair Value Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Available for Sale Securities Amortized Cost and Fair Value Fair value of credit substitutes Unrealized Loss On Investments [Table Text Block] Unrealized loss position investments Tabular disclosure of unrealized loss on investments. Investments Classified by Contractual Maturity Date [Table Text Block] Investments Classified by Contractual Maturity Date Realized Gain (Loss) on Investments [Table Text Block] Realized Investment Gains Losses Net Credit Substitutes [Table] Credit Substitutes by Credit Quality Indicators [Table Text Block] Fair value of credit substitutes for non-performing credit substitutes Credit Substitutes by Credit Quality Indicators [Table Text Block] Receivables [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Consumer Portfolio Segment [Member] Retail Loans Retail Loans [Member] Retail loans Commercial Portfolio Segment [Member] Wholesale loans Wholesale Wholesale Loans [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Receivable By Industry [Member] Receivable By Industry Receivable By Industry [Member] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loans by Facility Schedule of Financing Receivables, Minimum Payments [Table Text Block] Financing Receivable, by Maturity Financing Receivable Credit Quality Indicators [Table Text Block] Financing Receivable Credit Quality Indicators Financing Receivable, Past Due [Table Text Block] Past Due Financing Receivables Schedule Of Nonperforming Financing Receivables [Table Text Block] Non-performing Financing Receivables Tabular disclosure of non-performing​ financing receivables. Financing Receivable, Allowance for Credit Loss [Table Text Block] Allowance for Credit Losses on Financing Receivables Schedule of Interest On Loans By Facility [Table Text Block] Interest on Loans by Facility Tabular disclosure of interest on loans by facility. Fees Recognized in Exchange for Servicing Financial Assets [Table] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Summary of Fair Value of Retained Interests in Finance Receivables Cash Flows Between Transferee and Transferor [Table Text Block] Summary of Cash Flows Between Transferee and Transferor Cash flows between transferee and transferor. Schedule of Variable Interest Entities [Table Text Block] Variable Interest Entity Not Primary Beneficiary Disclosures Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Major Customers [Member] Exposure to ten largest borrowers Major Customers [Member] Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Schedules of Concentration of Risk, by Risk Factor Fair Value, Concentration of Risk [Table Text Block] Fair Value, Concentration of Risk Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment Schedule of Intangible Assets and Goodwill [Table Text Block] Intangible Assets, Net Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Future Amortization of Finite Lived Intangible Assets Schedule of Goodwill [Table Text Block] Carrying Amount of Goodwill Deferred Costs Capitalized Prepaid and Other Assets Disclosure [Table] Schedule of Other Assets [Table Text Block] Other Assets Disclosure Banking And Thrift Interest [Table] Deposit Liabilities, Type [Table Text Block] Summary of Deposit Liabilities Table Disclosures Time Deposit Maturities [Table Text Block] Summary of Time Deposits By Maturity Short-Term Debt [Table] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table Text Block] Short-Term Borrowings Schedule of Long-Term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt [Member] Long-term Debt Long-term debt [Member] Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Long-term Debt Instruments Schedule of Maturities of Long-term Debt [Table Text Block] Maturities of Long-Term Debt Disclosures Payables And Accruals [Table] Statement [Table] Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Accrued Expenses and Other Liabilities Accumulated Other Comprehensive Income [Table] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Summary of Changes in Accumulated Other Comprehensive Income After Tax Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Summary of Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect Separate Account, Liability [Table Text Block] Summary of Balances of and Changes in Separate Account Liabilities Fair Value, Separate Account Investment [Table Text Block] Summary of Bank's Aggregate Fair Value of Assets, by Major Investment Asset Category, Supporting Separate Accounts Liabilities Schedule of Liability for Future Policy Benefits, by Product Segment [Table Text Block] Summary of Bank's Liability for Future Policy Benefits on the Consolidated Balance Sheets Present Value of Future Insurance Profits [Table Text Block] Summary of Information Regarding Movement of Total VOBA Contracts Present Value of Future Insurance Profits, Expected Amortization [Table Text Block] Summary of Information Regarding the Estimated Future Amortisation of VOBA Intangibles Over the Next Five Years Liability for Future Policy Benefit, Activity [Table Text Block] Summary of Information About the Liability for Future Policy Benefits Disclosure in Tabular Form of Gross Premium and Interest Expenses on Long Duration Insurance Contracts [Table Text Block] Summary of Bank's Gross Premiums or Assessments and Interest Expense Recognised Disclosure in tabular form of gross premium and interest expenses on long duration insurance contracts. Effects of Reinsurance [Table Text Block] Summary of Bank's Primarily two types of Reinsurance Treaties, Auto and Facultative Reinsurance with Third Parties Disclosure Of Liabilities On Policies In Force [Table Text Block] Summary of Bank's liabilities on Policies Disclosure of liabilities on policies in force. Policyholder Account Balance [Table Text Block] Summary of the Bank's Policyholder Account Balances on the Consolidated Balance Disclosure In Tabular Form Of Effects Of Reinsurance On The Consolidated Statement Of Operations [Table Text Block] Summary of Effect of Reinsurance Disclosure in tabular form of effects of reinsurance on the consolidated statement of operations. Summary of Information regarding total DAC by Line of business Summary of Information Regarding Total DAC by Line of Business Deferred policy acquisition segment. Unearned Revenue Reserve [Table Text Block] Summary of a Roll Forward of URR Unearned revenue reserve. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table Text Block] Summary of Disaggregation of Revenue Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Summary of Disaggregation of Revenue from Business Segments Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Income Tax Expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of Income Taxes at Indian Statutory Income Tax Rate to Income Tax Expense as Reported Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Tax Effects of Significant Temporary Differences Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Reconciliation of Beginning and Ending Balance of Unrecognized Tax Benefits Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Share-based Payment Arrangement, Option, Activity [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Table Text Block] Schedule of Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions Tabular disclosure of the significant assumptions used during the year to estimate the fair value of RSUs, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units, Activity Schedule Of Share Based Compensation Shares Authorized Under Restricted Stock Units Plans By Exercise Price Range [Table Text Block] Schedule of Share-based Compensation, Shares Authorized under Restricted Stock Units Plans, by Exercise Price Range Tabular disclosure of restricted stock units exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under restricted stock units, weighted average exercise price and remaining contractual restricted stock units terms. Defined Benefit Plan [Table] Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Domestic Postretirement Benefit Plans of Foreign Entity Defined Benefits [Member] Gratuity Domestic postretirement benefit plans of foreign entity defined benefits. Domestic Pension Plans of Foreign Entity Defined Benefits [Member] Pension Domestic Pension Plans of Foreign Entity Defined Benefits [Member] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Defined Benefit Plans Disclosures Schedule of Net Benefit Costs [Table Text Block] Schedule of Net Benefit Costs Defined Benefit Plan, Assumptions [Table Text Block] Schedule of Assumptions Used Schedule of Expected Benefit Payments [Table Text Block] Schedule of Expected Benefit Payments Schedule of Allocation of Plan Assets [Table Text Block] Schedule of Allocation of Plan Assets Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Schedule of Guarantor Obligations [Table Text Block] Schedule of Guarantor Obligations Offsetting Assets And Liabilities [Table Text Block] Amounts Subject to Enforceable Netting Arrangements Offsetting assets and liabilities. Schedule Of Allowance For Credit Losses On Off Balance Sheet Credit Exposures And Undrawn Commitments [Table Text Block] Summary of allowance for Credit Losses on Off-Balance sheet credit exposures and undrawn commitments Schedule of allowance for credit losses on off-balance sheet credit exposures and undrawn commitments table text block. Fair Value, by Balance Sheet Grouping [Table] Statement [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping Segment Reporting [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment Commitments and Contingencies Disclosure [Table] Lessee, Operating Leases [Text Block] Operating Leases of Lessee Disclosure Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases Movement in Provision for Reward Points [Table Text Block] Movement in Provision for Reward Points Tabular disclosure of movement in provision for credit card and debit card reward points during the period. Lessee Operating Lease Right Of Use Asset And Lease Liability [Table Text Block] Summary of Operating Lease Right of Use Asset and Lease Liability Tabular disclosure of lessee operating lease right of use asset and lease liability. Schedule of Related Party Transactions [Table Text Block] Schedule of Related Party Transactions Schedule of Weighted Average Number of Shares [Table Text Block] Weighted-average number of shares Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Earnings Per Share Organization, Consolidation and Presentation of Financial Statements [Abstract] Equity Method Investments [Table Text Block] List of Subsidiaries Disclosure of Interest in Associates [Table Text Block] List of Affiliates Disclosure of interest in associates. Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Investments [Member] Investments Derivative [Member] Derivative Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Information about Changes in Fair Value of Level 3 Assets Pertaining to Instruments Carried at Fair Value Nature Of Business [Table] Nature Of Business [Table] Nature Of Business [Table] Major Shareholders [Axis] Major Shareholders [Axis] Major Shareholders [Axis] Major Shareholders [Domain] Major Shareholders [Domain] Major Shareholders [Domain] Nature Of Business [Line Items] Nature Of Business [Line Items] Nature Of Business [Line Items] Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Equity ownership interest of the bank's largest shareholder Per Share Value of Bonus Equity Share Per share value of bonus equity share Per share value of bonus equity share. Stock Issued During Period, Value, Stock Dividend Bank allotted equity shares as bonus shares Stock Issued During Period, Shares, New Issues Equity shares, issued Minority Interest Decrease From Stock Issuance Minority interest decrease from stock issuance Minority interest decrease from stock issuance. Sale of Stock, Price Per Share Sale of stock price per share Equity Method Investment, Ownership Percentage Bank voting rights The stake-holding of the Bank Equity method investment, ownership percentage Authorized Share Capital Amount Authorized share capital Authorized share capital amount. Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Statistical Measurement [Domain] Sale of Stock [Axis] Sale of Stock [Domain] IPO [Member] Shares Offered For Sale [Member] Consolidated Entities [Axis] Consolidated Entities [Domain] HDB Financial Services Limited [Member] HDB Financial Services Limited HDB Financial services limited. Investment, Name [Axis] Investment, Name [Domain] Nonconsolidated Investees, Other [Member] Accounting Standards Update [Axis] Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Domain] Type of Adoption [Domain] HDFC Group [Member] HDFC Group [Member] Minimum [Member] Minimum Maximum [Member] Maximum Maximum [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Percentage of voting rights in which bank consolidates subsidiary Number of Reportable Segments Reportable segments Foreign Currency Exchange Rate, Translation Financial statements translation rate, Indian rupees (Rs.) equivalence of U.S. $1 Balance Sheet Location [Axis] Balance Sheet Location [Domain] Impact of ASC 326 Adoptions [Axis] Impact of ASC 326 adoptions. Impact of ASC 326 Adoptions [Member] Impact of ASC 326 adoptions HDFC Bank Limited [Member] HDFC Bank Limited HDFC bank limited. Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building and Building Improvements [Member] Premises Software and Software Development Costs [Member] Software and systems Equipment and Furniture [Member] Equipment and furniture Equipment and Furniture [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Depreciation Rate Rate of depreciation Depreciation Rate Schedule Of Intangible Assets [Abstract] Schedule Of Intangible Assets [Table] Indefinite-Lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Brand [Member] Brand [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Distribution Service [Member] Distribution Network [Member] Distribution network [Member] Customer Relationships [Member] Customer Relationship [Member] Customer relationship [Member] Transferable Development Rights [Member] Transferable Development Rights [Member] Transferable development rights [Member] Investment Advisory, Management and Administrative Service [Member] Investment Management Contract [Member] Investment management contract [Member] Value Of Business Acquired [Member] Value of Business Acquired (VOBA) [Member] Value of business acquired [Member] Schedule Of Intangible Assets [Line Items] Indefinite Lived Intangible Asset Useful Life Indefinite Lived Intangible Asset Useful Life Indefinite lived intangible assets useful life. Finite-Lived Intangible Asset, Useful Life Useful lives (years) Indefinite Lived Intangible Assets Amortization Method Indefinite Lived Intangible Assets Amortization Method Indefinite lived intangible assets amortization method. Finite-Lived Intangible Assets, Amortization Method Amortization method Finite Lived Intangible Assets Useful Life Finite Lived Intangible Assets Useful Life Finite lived intangible assets useful life. Schedule of Business Acquisitions, by Acquisition [Table] Income Statement Location [Axis] Income Statement Location [Domain] Business Acquisition [Line Items] Business Acquisition, Percentage of Voting Interests Acquired Business acquisition, percentage of voting interests acquired Number Of Shares Exchanged And Issued On Amalgamation Number of shares received Number of shares issued in exchange for each set of shares of acquiree received. Number Of Shares Surrendered Per Set In Exchange Number of shares held for each set of shares received Number of shares of acquiree surrendered in exchange for each set of shares received. Business Acquisition, Effective Date of Acquisition Business acquisition, effective date of acquisition Business Combination, Consideration Transferred Business combination, consideration transferred Business Acquisition, Share Price Business acquisition, share price Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Business acquisition, equity interest issued or issuable, number of shares Common equity share issued Disposal Group, Including Discontinued Operation, Assets Disposal group, including discontinued operation, assets Indefinite-Lived Intangible Assets, Purchase Accounting Adjustments Indefinite-lived intangible assets, purchase accounting adjustments Business Acquisition, Transaction Costs Business acquisition, transaction costs Share Based Compensation by Share Based Award Number of Shares Underlying Such Awards Post Business Combination Share based compensation by share based award number of shares underlying such awards post business combination Share based compensation by share based award number of shares underlying such awards post business combination. Class of Warrant or Right, Outstanding Class of warrants or rights outstanding Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability Business combination recognized identifiable asset acquired and liabilities assumed contingent liability Per Share Value Of Shares Received Per share value of shares received Per Share Value Of Shares Received. Per Share Value of Shares Held For Each Set of Shares Received Per share value of shares held for each set of shares received Per Share Value of Shares Held For Each Set of Shares Received. Goodwill, Written off Related to Sale of Business Unit Goodwill written off related to sale of business unit Goodwill written off related to sale of business unit Less: Goodwill Derecognized on disposal during the year Indefinite-Lived Intangible Assets, Written off Related to Sale of Business Unit Indefinite lived intangible assets written off related to sale of business unit Pro Data Basis Bonus Issue Pro Data Basis Bonus Issue. Disposal Group Classification [Axis] Disposal Group Classification [Domain] HDFC Credila Financial Services Limited [Member] HDFC Credila Financial Services Limited [Member] HDFC Credila financial services limited. HDFC Education and Development Services Limited [Member] Equity Interest [Member] Other Commitments [Axis] Other Commitments [Domain] Goods and Service Tax [Member] Business Combination Value Of Sharebased Compensation Consideration Share-based compensation Amount of Share-based compensation consideration issued on business combination. Business Combination Of Value Of Share Warrants Issued Share warrants Amount of share warrants issued on business combination. Business Combination Of Fair Value Of Merger Consideration Fair value of merger consideration Aggregate of all merger consideration ​paid on business combination. Business Combination Separately Recognized Transactions Settlement Of Preexisting Relationship Settlement of pre-existing relationship Amount of pre-existing amount now separately settled and recognized on business combination. Business Combination, Acquisition Related Costs Acquisition-related costs Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] A. Recognized amounts of identifiable assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash and due from banks Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Investment securities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loan Net Loans - Net Business combination recognized identifiable assets acquired and liabilities assumed loan net. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property and equipment Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Identified intangibles assets Business combination acquired Intangible assets, excluding goodwill. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Other assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Separate Account Assets Separate account assets The assets recognized for each amount of assets recorded in a transaction with the acquire that is recognized being asset at fair value held for benefit of separate account policyholder. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Total estimated assets acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Interest Receivable Accrued interest receivable Amount due from accrued interest receivable in the normal course of business. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] B. Recognized amounts of identifiable liabilities assumed and Noncontrolling Interests Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits Deposits The aggregate amount of all deposits liabilities acquired at the acquisition date. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-Term Debt Borrowings Business Combination Recognized Identifiable Assets Acquired And Liabilities Policies in Force Liabilities on policies in force Amount of Liabilities recorded for insurance contract written under business combination. Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Separate Account Liabilities Separate account liabilities The liabilities assumed for each amount of liabilities recorded in a transaction with the acquire that is recognized being liabilities at fair value held for benefit of separate account policyholder. Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Expenses And Other Liabilities Accrued expenses and other liabilities Business combination recognized identifiable assets acquired and liabilities assumed accrued expenses and other liabilities. Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Non Controlling Interest Noncontrolling Interest in eHDFC subsidiaries Business combination recognized identifiable assets acquired and liabilities assumed non controlling interest. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Total estimated liabilities assumed Business Asset Acquisition Consideration Transferred [Abstract] Consideration Business Asset Acquisition Consideration Transferred [Abstract] Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Common equity share issued 3,110,396,492 shares of the Bank (6,220,792,984 equity shares after giving effect to the 1:1 bonus issue on August 28, 2025) Business Combination Investment In The Bank By eHDFC Investment in the Bank by eHDFC Business combination investment in the bank by eHDFC. Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Fair value of net purchase consideration transferred eHDFC [Member] eHDFC [Member] eHDFC. Business Combination, Segment Allocation [Table] Business Combination Segment Allocation [Line Items] Wholesale Banking [Member] Wholesale Banking [Member] Retail Banking [Member] Retail Banking [Member] Other Segments [Member] Others [Member] Others Insurance Services [Member] Insurance Services [Member] Insurance services. Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Asset, Weighted Average Period before Next Renewal or Extension Useful lives (in years) Finite-Lived Intangible Assets, Fair Value Disclosure Estimated Fair Value Indefinite Lived Intangible Assets Description of Valuation Methodology Valuation Methodology Indefinite lived intangible assets description of valuation methodology. Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure Estimated Fair Value Finite Lived Intangible Assets Description of Valuation Methodology Valuation Methodology Finite lived intangible assets description of valuation methodology. Finite and Indefinite Lived Intangible Assets at Fair Value Total Finite and indefinite lived intangible assets at fair value. Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Relief from Royalty Method [Member] Relief from royalty method [Member] Relief from royalty method. Multi Period Excess Earnings Method [Member] Multi-period excess earnings method [Member] Multi period excess earnings method. Difference Between Fair Value of Liabilities and US Gaap Value of Liabilities [Member] Refer below [Member] Difference between fair value of liabilities and us gaap value of liabilities. Comparison Method [Member] Comparison method [Member] Comparison method. Disclosure Of Financing Receivable Purchased With Credit Deterioration [Line Items] Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value Par value of PCD loans at acquisition Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Allowance for credit losses on PCD loans at acquisition Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total Fair value of receivables at acquisition Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) Non-credit discount/(premium) on PCD loans at acquisition Retail [Member] Retail Disclosure In Tabular Form Of Prexisting Relationship With Acquiree And Its Subsidiaries [Table] Disclosure In Tabular Form Of Prexisting Relationship With Acquiree And Its Subsidiaries [Line Items] Cash and Due from Banks Preexisting Relationships Cash and due from Banks Cash and due from banks preexisting relationships. Investments Preexisting Relationship Investments, available for sale, at market Investments preexisting relationship. Other Payable Preexisting Relationship Accrued expenses and other liabilities Other payable preexisting relationship. Other Receivables Prexisting Relationship Other assets Other receivables prexisting relationship. Net Assets Prexisting Relationship Net Assets Net assets prexisting relationship. Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash Restricted cash Investments, Debt and Equity Securities [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities [Member] Debt Securities Other Securities Including Mutual Fund Units And Equity Securities [Member] Other securities (including mutual fund units) Government of India Securities [Member] Government of India securities Government of India Securities [Member] Securities Other Corporate Financial Institution [Member] Other corporate/financial institution securities Securities Other Corporate Financial Institution [Member] Debt and Equity Securities, FV-NI [Line Items] Schedule of Trading Securities and Other Trading Assets [Line Items] Debt Securities, Trading, Amortized Cost Amortized Cost Debt Securities, Trading, Unrealized Gain Gross Unrealized Gains Debt Securities, Trading, Unrealized Loss Gross Unrealized Losses Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-sale [Table] Schedule of Available-for-sale Securities [Table] Collateralized Mortgage Backed Securities [Member] Mortgage-backed securities Asset-backed Securities [Member] Asset-backed securities Available For Sale Securities Gross Unrealized Loss [Member] Securities with gross unrealized losses Available For Sale Securities Gross Unrealized Loss [Member] Available For Sale Securities Gross Unrealized Gain [Member] Securities with gross unrealized gains Available For Sale Securities Gross Unrealized Gain [Member] Debt Securities, Available-for-sale [Line Items] Schedule of Available-for-sale Securities [Line Items] Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Gross Unrealized Losses Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss Amortized Cost Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Securities Issued by State Government [Member] State government securities Securities Issued by State Government [Member] Government Securities Outside India [Member] Government securities outside India Government securities outside India. Credit Substitutes [Member] Credit substitutes Credit Substitutes Credit Substitutes [Member] Other Corporate/Financial Institution Bonds [Member] Other corporate/financial institution bonds Other Corporate/Financial Institution Bonds [Member] HDB Debt Securities Other Than Asset And Mortgage Backed Securities [Member] HDB Debt Securities Other Than Asset And Mortgage Backed Securities HDB Debt Securities Other Than Asset And Mortgage Backed Securities [Member] Securities Eligible for Statutory Liquidity Ratio Requirements Available for sale investments, amount eligible towards the Bank's statutory liquidity reserve requirements The amount of Securities eligible for placement towards the Bank's Statutory Liquidity Ratio Requirements. Debt Securities, Available-for-sale, Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) Net allowance for credit losses Debt Instrument, Credit Rating Average credit rating Debt Securities, Available-for-Sale, Allowance for Credit Loss Allowance for credit loss Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Domain] Government Issued or Backed Securities [Member] Government Issued or Backed Securities Government Issued or Backed Securities [Member] Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Gain (Loss) on Securities [Line Items] Gain (Loss) on Securities [Line Items] Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Less Than 12 Months Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Less Than 12 Months Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 12 Months or Greater Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 12 Months or Greater Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Unrealized Losses Investments Classified by Contractual Maturity Date [Table] Investments Classified by Contractual Maturity Date [Table] Investments Classified by Contractual Maturity Date [Table] Investments Classified by Contractual Maturity Date [Line Items] Investments Classified by Contractual Maturity Date [Line Items] Investments Classified by Contractual Maturity Date [Line Items] Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Over one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Over five years through ten years Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Over ten years Debt Securities, Available-for-sale, Amortized Cost Total Amortized Cost Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Over one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Over five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Over ten years Debt Securities, Available-for-sale, Realized Gain Gross realized gains on sale Debt Securities, Available-for-sale, Realized Loss Gross realized losses on sale Debt Securities, Available-for-Sale, Gain (Loss) Total Investment Securities Class [Axis] Investment Securities Class [Axis] Investment Securities Class [Axis]. Investment Securities Class [Domain] Investment Securities Class [Domain] Investment Securities Class [Domain]. Types of Investment [Axis] Types of investment. Types of Investment [Domain] Types of investment. Debentures [Member] Debentures Debentures [Member] Preferred Stock [Member] Preference shares Credit Substitutes Performing Performing Credit Substitutes Performing in which payments are received or paid on a timely basis in accordance with the terms of the contract. Non Performing Gross Balance Non-performing—gross balance Gross amount of non-performing credit substitute. Non Performing Losses Less: Non-performing losses Amount of expense related to Credit substitutes based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. Non Performing Credit Substitutes, Net Non-performing credit substitutes, net Amount of credit substitute net of expense on account of non-performing credit substitute. Available-for-sale Credit Substitute Securities Total credit substitutes, net Fair value of credit substitutes This item represents the aggregate fair value of investments in Available for Sale Credit Substitute. Impaired Credit Substitutes, Interest Income, Accrual Method Interest income recognized on non-performing credit substitutes Amount of interest income recognized on credit substitute securities classified as impaired during the period. Average Impaired Credit Substitutes Average non-performing credit substitutes Average Gross amount during the period of credit substitute securities where cost exceeds fair value is not an other than temporary impairment (OTTI) and which is determined to be temporarily impaired. Impaired Credit Substitutes Gross non-performing credit substitutes Credit Substitutes Impaired Gross Amount where fair value is below cost and the decline is other than temporary. Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Credit Agreement [Axis] Credit Agreement [Axis] Credit Agreement [Domain] Credit Agreement [Domain] Credit Substitutes by Industry [Member] Credit Substitutes by Industry [Member] Schedule of Repurchase Agreement and Resale Agreement Counterparty [Table] Schedule of Repurchase Agreement and Resale Agreement Counterparty [Table] Schedule of Repurchase Agreement and Resale Agreement Counterparty [Table] Repurchase Agreement and Resale Agreement Counterparty [Line Items] Repurchase Agreement and Resale Agreement Counterparty [Line Items] Repurchase Agreement and Resale Agreement Counterparty [Line Items] Resale Agreement Counterparty, Weighted Average Maturity of Agreements Securities purchased under agreements to resell, maturity (days) Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements Securities sold under repurchase agreements, maturity (days) Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Financing Receivable, after Allowance for Credit Loss Loans provided as collateral for borrowings Financing Receivable, Troubled Debt Restructuring Loans receivable restructured due to unexpected event Financing Receivable, Threshold Period Past Due Number of days past due up to which loans Loans receivable period past due Financing Receivable, Purchase Purchased financing receivable outstanding Crop Related Agricultural Loans [Member] Crop related agricultural loans Crop related agricultural loans member. Catastrophic Event [Axis] Catastrophic Event [Domain] Current Loans [Member] Current loans Current loans. Loans And Leases Receivable Net Of Allowance Deferred Income Total Amount of loans and leases receivable net of allowance, and deduction of deferred interest and fees. Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process Gross loans Total gross loans Gross loans Automobile Loan [Member] Auto loans Auto Loan [Member] Personal Loans and Credit Card Financing Receivable [Member] Personal loans/Credit card Personal Loans and Credit Card Financing Receivable [Member] Retail Business Banking [Member] Retail business banking Retail Business Banking [Member] Commercial Vehicle and Construction Equipment Finance [Member] Commercial vehicle and construction equipment finance Commercial vehicle and construction equipment finance Home Equity Loan [Member] Housing loans Other Retail [Member] Other retail loans Other Retail Other retail Other Retail [Member] Financing Receivable, before Allowance for Credit Loss, Maturity, Year One Within one year Financing Receivable, before Allowance for Credit Loss, Maturity, after Year One Through Five Over one year through five years Financing Receivable Before Allowance For Credit Loss Maturity After Year Five Over five years Financing Receivable Before Allowance For Credit Loss Maturity After Year Five. Gross Loans [Member] Gross Loans Gross loans. Financing Receivable, Nonaccrual Finance receivable on non-accrual status Non-performing loans Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] Financing Receivable, 31 to 90 Days Past Due [Member] 31 to 90 days past due Financing Receivable, 31 to 90 Days Past Due [Member] Financing Receivable Nonperforming or Ninety One Days and Greater Past Due [Member] Non-accrual/ 91 days or more past due Financing Receivable non-performing or Ninety One Days and Greater Past Due [Member] Financing Receivable, Current [Member] Total current Total current Agricultural Loan [Member] Agricultural Loan Agricultural loan. Financing Receivable Not Impaired or Less Than Three Hundred And Sixty Six Days Past Due [Member] Not Impaired or Less Than 366 days Past Due Financing receivable not impaired or less than 366 days past due. Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Originated, More than Five Years before Current Fiscal Year Prior Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year Before four years Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year Before three years Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year Before two years Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year Before one years Financing Receivable, Year One, Originated, Current Fiscal Year Current Financing Receivable, Revolving Revolving Loans Financing Receivable, before Allowance for Credit Loss Total Financing Receivable, Revolving, Converted to Term Loan Revolving loans converted to term loans Performing Financial Instruments [Member] Performing Nonperforming Financial Instruments [Member] Non-performing Pass [Member] Pass Labelled [Member] Labelled Labelled member. Reporting Basis Gross or Net [Axis] Reporting basis gross or net. Reporting Basis Gross or Net [Domain] Reporting basis gross or net. Written Off [Member] Write off Written off. Industry Sector [Axis] Industry Sector [Axis] Industry Sector [Domain] Industry Sector [Domain] Product and Service [Axis] Segments [Axis] Product and Service [Axis] Product and Service [Domain] Segments [Domain] Product and Service [Domain] Consumer Loan [Member] Consumer Loans Agriculture Production Food [Member] Agri Production—Food Agriculture Production- Food [Member] Other loans [Member] Others (none greater than 5% of non-performing loans) Other loans Other loans [Member] Retail Trading [Member] Retail Trade Retail Trading [Member] AgriAllied [Member] Agri Allied Agri-Allied Agri allied . Road Transportation [Member] Road Transportation Road transportation. Real Estate Loan [Member] Real Estate & Property Services Animal Husbandry [Member] Animal Husbandry Financing Receivable, Nonaccrual, Interest Income Interest income recognized on non-performing loans Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Loans Receivable [Member] Gross Loans Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Allowance for credit losses: Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Allowance individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Allowance collectively evaluated for impairment Loans and Leases Receivable, Net of Deferred Income [Abstract] Loans: Financing Receivable, Individually Evaluated for Impairment Loans individually evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Loans collectively evaluated for impairment Financing Receivable, Allowance for Credit Loss, Writeoff Write-offs Financing Receivable, Credit Loss, Expense (Reversal) Net allowance for credit losses Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase Allowance for credit losses on PCD Loans at acquisition Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery Cash recoveries, recoveries against write off cases Financing Receivable, Allowance for Credit Loss, Recovery Recoveries of loans Proceeds from Collection of Retained Interest in Securitized Receivables Collections against securitized receivables/transfers Cash Flows Between Transferor and Transferee, Beneficial Interest Cash flows on retained interests Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding Transferred receivables with continuing involvement Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-Backed Financing Arrangement Delinquencies Cash Flows Between Transferor and Transferee, Proceeds from Collections Reinvested in Revolving Period Transfers Payments made Transferor's Interests in Transferred Financial Assets, Fair Value Retained interest Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Adverse Change In Prepayment Speed [Abstract] Annual prepayment rate: Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Adverse Change In Prepayment Speed [Abstract] Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Impact of 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Impact of 20% adverse change Schedule of Securitization or Asset-backed Financing Arrangements, Financial Asset for which Transfer is Accounted as Sale [Table] Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract] Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Maximum exposure to loss Vatiable Interest Entity Debt Interests Debt interests Vatiable interest entity debt interests. Vatiable Interest Entity Commitments Guarantees and others Amount Commitments, guarantees, others Vatiable interest entity commitments guarantees and others amount. Variable Interest Entity, Primary Beneficiary [Member] Classes of Assets [Axis] Classes of Assets [Domain] Loans [Member] Loans [Member] Other Assets [Member] Other Assets [Member] Other Assets Classes of Liabilities [Axis] Classes of Liabilities [Domain] Accounts Payable and Accrued Liabilities [Member] Accrued expenses and other liabilities [Member] Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds Securitization transactions sold housing loans Housing Loan [Member] Housing Loan [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration of Credit Risk by Industry [Member] Concentration of Credit Risk by Industry Exposure to customers or clients for goods or services that have been delivered or sold including unfunded commitments. Lender Concentration Risk [Member] Lender Concentration Risk Concentration Risk [Line Items] Concentration Risk [Line Items] Loans and Leases Receivable Non Funded Exposure Non-funded exposure Amount of unfunded commitments for which the entity is obligated, including, but not limited to, financial standby letter of credit, value of guarantees, contracts that contingently require the guarantor to make payments or perform services. Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure Total Exposure Concentration Risk, Percentage % Non-Bank Financial Companies and Financial Intermediaries [Member] NBFC Non-Bank Financial Companies and Financial Intermediaries [Member] Consumer Services [Member] Consumer Services Consumer Services [Member] Wholesale Trade - Non Industrial [Member] Wholesale Trade - Non-Industrial Wholesale trade - non industrial. Land Transport [Member] Road Transportation Land Transport [Member] Wholesale Trade - Industrial [Member] Wholesale Trade - Industrial Wholesale Trade - Industrial. Food and Beverage [Member] Food and Beverage Real Estate and Property Services [Member] Real Estate & Property Services Real Estate and Property Services [Member] Engineering [Member] Engineering Engineering [Member] Power [Member] Power Power [Member] Other Services [Member] Others (none greater than 2%) Other Services [Member] Infrastructure Development [Member] Infrastructure Development Infrastructure development. Iron and Steel [Member] Iron and Steel Iron and Steel [Member] Business Services [Member] Business Services [Member] Funded Exposure [Member] Funded Exposure Funded Exposure [Member] NonFunded Exposure [Member] Non-Funded Exposure NonFunded Exposure [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Borrower 1 [Member] Borrower 1 Borrower 1 [Member] Borrower 2 [Member] Borrower 2 Borrower 2 [Member] Borrower 3 [Member] Borrower 3 Borrower 3 [Member] Borrower 4 [Member] Borrower 4 Borrower 4 [Member] Borrower 5 [Member] Borrower 5 Borrower 5 [Member] Borrower 6 [Member] Borrower 6 Borrower 6 [Member] Borrower 7 [Member] Borrower 7 Borrower 7 [Member] Borrower 8 [Member] Borrower 8 Borrower 8 [Member] Borrower 9 [Member] Borrower 9 Borrower 9 [Member] Borrower 10 [Member] Borrower 10 Borrower 10 [Member] Capitalized Computer Software, Gross Software and systems Furniture and Fixtures, Gross Equipment and furniture Property, Plant and Equipment, Gross Property and equipment, at cost Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation Land Land and premises Finite and Indefinite Lived Intangible Assets [Table] Finite and indefinite lived intangible assets. Finite And Indefinite Lived Intangible Assets [Line Items] Finite and indefinite lived intangible assets. Goodwill, Impairment Loss GoodwillI impairment Loss Depreciation And Amortization [Member] Depreciation and amortization. Erstwhile Centurion Bank Of Punjab [Member] Erstwhile Housing Development Finance Corporation Limited [Member] Schedule of Goodwill [Table] Treasury Services [Member] Goodwill [Line Items] Goodwill, Acquired During Period Goodwill on acquisition during the year Intangible Assets, Gross (Excluding Goodwill), Total Intangible Assets Finite-Lived Intangible Assets, Accumulated Amortization Less: Accumulated amortization Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Finite-Lived Intangible Asset, Expected Amortization, Year One 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five 2031 Finite-Lived Intangible Asset, Expected Amortization, after Year Five Thereafter Finite-Lived Intangible Assets, Net Total Other Assets Disclosure [Table] Other Assets Disclosure [Table] Other Assets Disclosure [Table] Other Assets Disclosure [Line Items] Other Assets Disclosure [Line Items] Other Assets Disclosure [Line Items] Security Deposit Security deposits for leased property Other Receivables Sundry accounts receivable Total Income Taxes Receivable Advance tax (net of provision for taxes) Advance tax (net of provisions of taxes) Retainage Deposit Advances Prepaid Expense Prepaid expenses Deposits with Clearing Organizations and Others, Securities Deposits/margins paid Derivative Asset, Fair Value, Gross Asset Derivatives (refer to note 26) Gross Assets Derivative assets, gross amounts Derivative assets Interest-Bearing Deposits in Banks and Other Financial Institutions Placements with financial institutions Other Assets, Miscellaneous Others Other assets Operating Lease, Right-of-Use Asset ROU Assets Right-of-use assets Receivable Trade Date Transaction Receivable on account of trade date Receivable on trade date transaction of securities. Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Deferred Tax Assets, Net Deferred tax assets (net) Assets Location [Axis] Assets location [Axis]. Assets Location [Domain] Assets location [Domain]. Equity Securities [Member] Equity securities Taxes Other Than Income Tax [Member] Taxes other than income tax [Member] Taxes other than income tax. Non Marketable Equity Securities [Member] Non Marketable Equity Securities [Member] Non Marketable Equity Securities [Member] Equity Securities, FV-NI, Unrealized Gain (Loss) Unrealized gain/(loss) recognized in non-interest revenue–other, net Reinsurance Recoverables, Including Reinsurance Premium Paid Reinsurance assets Deferred Policy Acquisition Cost Deferred policy acquistion costs Opening balance Closing balance Time Deposits [Table] Time Deposits [Table] Deposits [Axis] Deposits [Axis] Deposits [Axis] Deposit Type [Domain] Deposit Type [Domain] Deposit Type [Domain] In Excess Of Rupees Five Hundred Thousand [Member] Deposit in excess of Rs. 500000 In Excess of Rupees 500000 [Member] Deposits From Banking Clients [Line Items] Deposits From Banking Clients [Line Items] Deposits From Banking Clients [Line Items] Time Deposit Maturities, Next Twelve Months Time deposits with residual maturity of one year or less 2027 Time Deposits Time deposits Total Increase (Decrease) in Other Time Deposits Excess in time deposits Maturity of Time Deposits Maturity of deposits Deposits From Banking Clients [Table] Deposits From Banking Clients [Table] Deposits From Banking Clients [Table] Interest-bearing Deposit Liabilities [Abstract] Interest-bearing: Deposits, Savings Deposits Savings deposits Time Deposits, Fiscal Year Maturity [Abstract] Due to mature in the fiscal year ending March 31: Time Deposit Maturities, Year Two 2028 Time Deposit Maturities, Year Three 2029 Time Deposit Maturities, Year Four 2030 Time Deposit Maturities, Year Five 2031 Time Deposit Maturities, after Year Five Thereafter Short-term Debt [Line Items] Short-term Debt [Line Items] Short-term Debt, Weighted Average Interest Rate, at Point in Time Weighted average interest rate Short-term Debt, Maximum Amount Outstanding During Period Maximum amount outstanding Short-term Debt, Average Outstanding Amount Average amount outstanding Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Borrowed in Call Market [Member] Borrowed in the call market Borrowed in Call Market [Member] Line of Credit [Member] Term borrowings from institutions/banks Foreign Currency Borrowings [Member] Foreign currency borrowings Foreign Currency Borrowings [Member] Bills Rediscounted [Member] Bills rediscounted Bills Rediscounted [Member] Foreign Long Term Debt [Member] Foreign currency borrowings Foreign Long Term Debt [Member] Domestic Long Term Debt [Member] Functional currency borrowings Domestic Long Term Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Proceeds from Issuance of Subordinated Long-term Debt Subordinated debt, debt raised during the year Proceeds from Issuance of Other Long-term Debt Other long term debt, debt raised during the year Other Long-term Debt Other long-term debt Others Proceeds From Issuance Of Perpetual Debt Perpetual debt, debt raised during the year Proceeds from issuance of perpetual debt. Debt Issuance Costs, Net Debt issuance cost Long-Term Debt, Gross Subordinated debt Long-Term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-Term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Instrument Interest Rate [Axis] Debt Instrument Interest Rate [Axis] Debt Instrument Interest Rate [Axis] Debt Instrument Interest Rate [Domain] Debt Instrument Interest Rate [Domain] Debt Instrument Interest Rate [Domain] Subordinated Debt Other Than Perpetual Debt [Member] Subordinated debt (other than perpetual debt) Subordinated Debt Other Than Perpetual Debt. Perpetual Debt One [Member] Perpetual debt—(1) Perpetual debt Perpetual bonds one. Variable Rate One [Member] Variable rate—(1) Variable Rate One [Member] Variable Rate Two [Member] Variable rate—(2) Variable Rate Two [Member] Fixed Rate Debt One [Member] Fixed rate-(1) Fixed Rate Debt One [Member] Perpetual Debt Two [Member] Perpetual debt—(2) Perpetual debt 2. Fixed rate-(2) Fixed Rate Debt Two. Debt Instrument, Interest Rate, Stated Percentage Stated interest rates Debt Instrument, Maturity Date, Description Maturity /Call dates Subordinated Debt [Member] Subordinated debt Other Borrowings [Member] Others Other Borrowings [Member] Long-term Debt, Fiscal Year Maturity [Abstract] Due in the twelve months ending March 31: Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2027 Long-term Debt, Maturities, Repayments of Principal in Year Two 2028 Long-term Debt, Maturities, Repayments of Principal in Year Three 2029 Long-term Debt, Maturities, Repayments of Principal in Year Four 2030 Long-term Debt, Maturities, Repayments of Principal in Year Five 2031 Long-term Debt, Maturities, Repayments of Principal after Year Five Thereafter Long Term Debt Excluding Perpetual Debt [Member] Long-Term Debt Excluding Perpetual Debt Long term debt excluding perpetual debt. Other Liabilities [Table] Other Liabilities [Table] Other Liabilities [Table] Other Liabilities [Line Items] Other Liabilities [Line Items] Other Liabilities [Line Items] Deferred Costs Unamortized annual fees Product By Type [Axis] Product By Type [Axis] Product By Type [Axis] Product By Type [Domain] Product By Type [Domain] Product By Type [Domain] Credit Card [Member] Credit card Remittances In Transit Remittances in transit Gross amount of remittances in transit. Accrued Liabilities Accrued expenses Accounts Payable Accounts payable Derivative Liability, Fair Value, Gross Liability Derivatives (refer to note 26) Gross Liabilities Derivative liabilities, gross amounts Derivative liabilities Other Liabilities Others Operating Lease, Liability Lease liability Lease liabilities Total operating lease liabilities Bills Payable Bills payable Carrying value as of the balance sheet date of obligations, not limited to, negotiable instruments such as demand draft, bankers cheque. Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible List] Deferred Tax Liabilities Net Deferred tax liability (net) Deferred tax liabilities net. Uncategorized [Abstract] Uncategorized [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Net unrealized gain/ (loss) arising during the period Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Amounts reclassified to income Net of income tax Other Comprehensive Income After Tax Long Duration Insurance Contracts Discount Rate Change Long-duration insurance contract discount rate change Other comprehensive income after tax long duration insurance contracts discount rate change. Surplus In Other Comprehensive Income Transferred To Undistributed Policyholders Earnings Account Transferred to undistributed policyholders earnings account Surplus in other comprehensive income transferred to undistributed policyholders earnings account. Other Comprehensive Income (Loss), before Tax, Portion Attributable to Noncontrolling Interest Less: Other comprehensive income attributable to shareholders of noncontrolling interest Other Comprehensive Income After Tax Prior Service Cost Due To Plan Amendment Past Service cost recognised due to plan amendment Other comprehensive income after tax prior service cost due to plan amendment. Other Comprehensive Income After Tax Amortization Of Prior Service Cost Amortization of past service cost Other comprehensive income after tax amortization of prior service cost. AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] AFS debt Securities Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign Currency Translation Reserve Long Duration Insurance Contract [Member] Long-Duration Insurance Contract Long duration insurance contract. Past Service Cost [Member] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Debt Securities, Available-for-sale [Abstract] AFS debt securities: Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Total before income tax Reclassification from AOCI, Current Period, Tax Income tax Reclassification From Accumulated Other Comprehensive Income Amortization Of Past Service Cost Amortization of past service cost Reclassification from accumulated other comprehensive income amortization of past service cost. Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income Separate Account, Liability [Table] Separate Account, Liability [Line Items] Separate Account, Liability, Premium and Deposit Premiums and deposits Separate Account, Liability, Policy Charge Policy charges Separate Account, Liability, Surrender and Withdrawal Surrenders and withdrawals Separate Account, Liability, Benefit Payment Benefit payments Separate Account, Liability, Increase (Decrease) from Invested Performance Investment performance Separate Account, Liability, Increase (Decrease) from Other Change Other charges Unit Linked Life [Member] Unit-Linked Life [Member] UL Life [Member] Unit linked life. Unit Linked Pension [Member] Unit-Linked Pension [Member] UL Pension [Member} Unit linked pension. Group Insurance Policy [Member] Group Linked [Member] Group Traditional Life [Member] Fair Value, Separate Account Investment [Table] Fair Value, Separate Account Investment [Line Items] Separate Account Asset Category [Axis] Separate Account Asset Category [Domain] Debt Securities Government of India Securities [Member] Government of India securities [Member] Debt securities government of india securities. Other Corporate Financial Institution Securities [Member] Other corporate/financial institution securities [Member] Other corporate financial institution securities. Separate Account, Debt Security [Member] Total debt securities [Member] Other Net Current Assets [Member] Other net current assets [Member] Other net current assets. Other Securities Including Mutual Fund Units [Member] Other securities (including mutual fund units) Other securities including mutual fund units. Liability for Future Policy Benefit, before Reinsurance Liability for Future Policy Benefits Total liability for future policy benefits and DPL for March 31 Policyholder Account Balance Policyholder Account Balances Policyholder Account Balance Other Policy Liabilities Payable Other Policy Liabilities Other policy liabilities payable. Liability For Future Policy Benefits [Table] Liability for Future Policy Benefits [Table] Liability for future policy benefits. Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Future Policy Benefits [Line Items] Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense Future policy benefits Non Participating Protection [Member] Non Par Protection [Member] Non participating protection. Non Participating Rider [Member] Non Par Riders [Member] Non participating rider. Nonparticipating Life Insurance Contract [Member] Non Par Savings [Member] Non Par Pension [Member] Non Par Pension [Member] Non par pension. Fixed Annuity [Member] Individual Annuity [Member] Health Insurance Product Line [Member] Individual Health [Member] Par Health [Member] Participating Life Insurance Contract [Member] Par Life [Member] Par Pension Insurance Product [Member] Par Pension [Member] Par pension insurance product. Group No Par Life Insurance [Member] Group Non par Life [Member] Group no par life insurance. Liability For Future Policy Benefits [Line Items] Liability for Future Policy Benefits [Line Items] Liability for future policy benefits. Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] Present value of Expected Future Policy Benefits Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change Adjusted Balance Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change Beginning balance Ending balance Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance Beginning balance Ending balance Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Effect of actuarial variances from expected experience Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance Issuances Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense Interest accrual Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment Benefits Payments Net Liability For Future Policy Benefits One Net liability for future policy benefits Net liability for future policy benefits one. Amount relating to Net insurance liability for future policy benefits. Deferred Profit Liabilities Deferred profit liability Amount of liability recognized as Deferred profit liability. Future Policy Benefit Reinsurance Recoverable Net Allowance Less: Reinsurance recoverable Amount net of allowance for credit loss recoverable under reinsurance for future policy benefit. Liability for Future Policy Benefit, after Reinsurance Net liability for future policy benefits, net of reinsurance Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance Undiscounted- Expected future benefit payments Liability For Future Policy Benefits Expected Future Payments After Discount Discounted- Expected future benefit payments (at current discount rate at balance sheet date) Liability for future policy benefits calculated at current discount rate at balance sheet date. Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance Undiscounted-Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance Discounted-Expected future gross premiums Liability for Future Policy Benefit, Weighted-Average Duration Weighted - average duration of the liability (in years) Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate Weighted - average interest accretion (original locked-in) rate Liability for Future Policy Benefit, Current Weighted-Average Discount Rate Weighted-average current discount rate at balance sheet date Liability For Future Policy Benefit Expected Future Policy Benefit Impact Of Changes In Discount Rate Assumptions Effect of changes in discount rate assumptions Liability for future policy benefit expected future policy benefit impact of changes in discount rate assumptions. Present Value of Expected Claims Expenses Present value of expected claims expenses Present value of expected claims expenses. Other Global Reserves Other global reserves Other global reserves. Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] Present value of expected net premium Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change Beginning balance Ending balance Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance Beginning balance Ending balance Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Effect of actuarial variances from expected experience Liability for Future Policy Benefit, Expected Net Premium, Issuance Issuances Liability for Future Policy Benefit, Expected Net Premium, Interest Income Interest accrual Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected Net premium collected Liability For Future Policy Benefit Expected Net Premium Impact Of Changes In Discount Rate Assumptions Effect of changes in discount rate assumptions Liability for future policy benefit expected net premium impact of changes in discount rate assumptions. Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, after Cash Flow Change Adjusted Balance Amount, before effect of reinsurance and after current period update of cash flow assumption, of expected net premium component for liability for future policy benefit, discounted at original rate. Non Participating Riders [Member] Non Par Riders [Member] Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Table] Disclosure in tabular form of gross premium and interest expenses on long duration insurance contracts [table]. Disclosure In Tabular Form Of Gross Premium And Interest Expenses On Long Duration Insurance Contracts [Line Items] Disclosure in tabular form of gross premium and interest expenses on long duration insurance contracts [Line items]. Additional Liability, Long-Duration Insurance, Gross Premium Income Gross premiums or assessments Additional Liability, Long-Duration Insurance, Interest Income (Expense) Interest expense Disclosure Of Policyholder Account Balances [Table] Disclosure of policyholder account balances table. Group Traditional Pension [Member] Group Traditional Pension [Member] Group traditional pension. Variable Life [Member] Group Variable Life [Member] Group Variable Pension [Member] Group Variable Pension [Member] Group variable pension. Individual VIP Pension [Member] Individual VIP pension [Member] Individual vip pension. Statutory Reserves [Member] Statutory reserves [Member] Statutory reserves. Disclosure Of Policyholder Account Balances [Line Items] Disclosure of policyholder account balances. Unearned Revenue Reserve [Line Items] Unearned revenue reserve. Opening balance Opening balance Closing balance Unearned revenue reserve. Unearned Revenue Reserve Capitalizations Capitalizations Unearned revenue reserve capitalizations. Unearned Revenue Reserve Amortization Expenses Amortization Unearned revenue reserve amortization expenses. Unearned Revenue Reserve Experience Adjustment Experience Adjustment Unearned revenue reserve experience adjustment. Reinsurance Premiums Direct Liability Direct Reinsurance premiums direct liability. Assumed Liability for Unpaid Claims and Claims Adjustment Expense Assumed Reinsurance Liabilities Gross Total liabilities on policies in force Reinsurance liabilities gross. SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Ceded Ceded Reinsurance Payable Net liabilities on policies in force Premiums Written and Earned [Abstract] Premium and other operating income from insurance business: Direct Premiums Earned Direct Assumed Premiums Earned Assumed Ceded Premiums Earned Ceded Premiums Earned, Net Total Policyholder Benefits and Claims Incurred, Net [Abstract] Claims and benefits paid pertaining to insurance business: Policyholder Benefits and Claims Incurred, Direct Direct Policyholder Benefits and Claims Incurred, Assumed Assumed Policyholder Benefits and Claims Incurred, Ceded Ceded Policyholder Benefits and Claims Incurred, Net Total Claims and benefits paid pertaining to insurance business Deferred Policy Acquisition Cost, Capitalization Capitalizations Deferred Policy Acquisition Costs, Amortization Expense Amortization Deferred Policy Acquisition Cost, Experience Adjustment Experience Adjustment UL Life [Member] UL life. UL pension [Member] Present Value of Future Insurance Profits, Net Beginning balance Ending balance Amortization of Value of Business Acquired (VOBA) Amortization Present Value of Future Insurance Profit, Experience Adjustment Experience Adjustment Present Value of Future Insurance Profits, Expected Amortization, Year One 2027 Present Value of Future Insurance Profits, Expected Amortization, Year Two 2028 Present Value of Future Insurance Profits, Expected Amortization, Year Three 2029 Present Value of Future Insurance Profits, Expected Amortization, Year Four 2030 Present Value of Future Insurance Profits, Expected Amortization, Year Five 2031 Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Deposit Related Fees [Member] Deposit related fees Deposit related fees. Lending [Member] Lending related fees Lending [Member] Third Party Products Related Fees [Member] Third-party products related fees Third Party Products Related Fees Member. Credit and Debit Card [Member] Payments and cards business fees Others [Member] Other Other [Member] Investment Management Fee [Member] Investment management fee Investment management fee. Retail Banking Segment [Member] Retail Banking Retail Banking Segment [Member] Wholesale Banking Segment [Member] Wholesale Banking Wholesale Banking Segment [Member] Treasury Services Segment [Member] Treasury Services Treasury Services Segment [Member] Other Segment [Member] Others Other segment. Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Unrecognized Tax Benefits Total unrecognized tax benefit Opening balance Closing balance Unrecognized Tax Benefits that Would Impact Effective Tax Rate The total unrecognized tax benefits, if recognized, that would reduce the tax and thereby affect the effective tax rate Other Comprehensive Income (Loss), Tax Other comprehensive income Additional Paid In Capital Income Loss Tax Additional paid in capital income loss tax Additional paid in capital income loss tax. Components Of Income Tax Expense Benefit [Table] Components Of Income Tax Expense Benefit [Table] Components Of Income Tax Expense Benefit [Table] Components Of Income Tax Expense Benefit [Line Items] Components Of Income Tax Expense Benefit [Line Items] Components of income tax expense benefit. Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Income Tax Expense Benefit Abstract Current Income Tax Expense (Benefit) Current tax expense Interest on Income Tax Refund Interest on income tax refund Amount received being interest on income tax refund. Reconciliation of Effective Income Tax Rate [Table] Reconciliation of Effective Income Tax Rate [Table] Reconciliation of Effective Income Tax Rate [Table] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Domain] Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items] Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items] Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items] Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract] Adjustments to reconcile expected income tax to actual tax expense Effective Income Tax Reconciliation Transfer To Special Reserve Amount Special reserve deduction Effective income tax reconciliation transfer to special reserve amount. Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Other, net Effective Income Tax Rate Reconciliation, Deduction, Other, Amount Income subject to rates other than the statutory income tax rate Effective Income Tax Reconciliation Unrecognized Tax Benefit Of Earlier Years Reversed Including Consequential Tax Credit As Per Favorable Orders Changes in unrecognized tax benefits of earlier years Effective income tax reconciliation unrecognized tax benefit of earlier years reversed including consequential tax credit as per favorable orders. Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Deficiencies/ (excess deductions) on Stock-based compensation Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Changes in tax laws or rates enacted in the current period Income Tax Reconciliation Interest On Income Tax Refund Interest on income tax refund, net of income tax effect Interest On Income Tax Refund net of tax. Effective Income Tax Rate Reconciliation At Interest On Income Tax Refund Rate Interest on income tax refund, net of income tax effect percent Effective income tax rate reconciliation at interest on ncome tax refund rate. Effective Income Tax Rate Reconciliation At Share Based Compensation Rate Deficiencies/ (excess deductions) on Stock-based compensation percent Effective income tax rate reconciliation at share based compensation rate. Effective Income Tax Rate Reconciliation, Deduction, Other, Percent Income subject to rates other than the statutory income tax rate percent Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Changes in tax laws or rates enacted in the current period percent Effective Income Tax Rate Reconciliation At Special Reserve Deduction Rate Special reserve deduction percent Effective income tax rate reconciliation at special reserve deduction rate. Effective Income Tax Rate Reconciliation At Unrecognized Tax Benefit Of Earlier Years Including Consequential Tax Credit Pursuant To Favourable Orders Rate Changes in unrecognized tax benefits of earlier years percent Effective income tax rate reconciliation at unrecognized tax benefit of earlier years including consequential tax credit pursuant to favourable orders rate. Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Other, net percent Effective Income Tax Rate Reconciliation, Percent Income tax expense percent Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Foreign tax effects Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Foreign tax effects percent Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Amount Cross border tax laws Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Percent Cross border tax laws percent Effective Income Tax Rate Reconciliation, Tax Credit, Amount Tax credit Effective Income Tax Rate Reconciliation, Tax Credit, Percent Tax credit percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Expected income tax expense percent Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Expected income tax expense Tax Jurisdiction of Domicile [Extensible Enumeration] Schedule of Deferred Income Tax Assets and Liabilities [Table] Schedule of Deferred Income Tax Assets and Liabilities [Table] Schedule of Deferred Income Tax Assets and Liabilities [Table] Schedule of Deferred Income Tax Assets and Liabilities [Line Items] Schedule of Deferred Income Tax Assets and Liabilities [Line Items] Schedule of Deferred Income Tax Assets and Liabilities [Line Items] Components of Deferred Tax Assets and Liabilities [Abstract] Tax effect of: Deferred Tax Assets, Net [Abstract] Deductible temporary differences: Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses Allowance for credit losses Deferred Tax Assets Lease Liabilities Lease liabilities Deferred tax assets lease liabilities. Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Accrued expenses and other liabilities - Employee benefits Deferred Tax Assets, Other Others Deferred Tax Assets, Net of Valuation Allowance Deferred tax asset Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Stock-based compensation Deferred Tax Assets Debt Borrowings Deferred tax assets debt. Deferred Tax Assets, Investments Investments Deferred Tax Assets Undistributed Foreign Earnings Undistributed policyholders earnings account Deferred tax assets undistributed foreign earnings. Deferred Tax Liabilities, Gross [Abstract] Taxable temporary differences: Deferred Tax Liabilities, Leasing Arrangements ROU asset Deferred Tax Assets Tax Deferred Expense Loan Origination Cost Loans Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from Loan Origination Costs. Deferred Tax Liabilities, Investments Investments Deferred Tax Liabilities, Intangible Assets Intangible assets Deferred Tax Liabilities, Gross Deferred tax liability Deferred Tax Liabilities, Other Others Deferred Tax Liabilities, Property, Plant and Equipment Property and equipment Deferred Tax Liabilities On Policies In Force Liabilities on policies in force Deferred tax liabilities on policies in force. Deferred Tax Liabilities, Net, Total Net deferred tax asset/ (liability) Reversal Of Deferred Tax Liability On Sale Of Subsidiary Reversal of deferred tax liability on sale of subsidiary. Deferred Tax Assets, Equity Method Investments Income Tax Contingency [Table] Income Tax Contingency [Table] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Increase related to current year tax positions Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Decrease related to prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Acquisition Increase related to acquisition of eHDFC Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Employee Stock Option Employees Stock Option Restricted Stock Units (RSUs) [Member] Schemes 45 to 55 Schemes 56 to 59 Schemes 60 to 62 Employee Stock Ownership Plan (ESOP) Name [Axis] Employee Stock Ownership Plan (ESOP) Name [Axis] Employee Stock Ownership Plan (ESOP), Plan [Domain] Employee Stock Ownership Plan (ESOP), Plan [Domain] Plan A [Member] Plan ''A'' Plan A [Member] Plan B [Member] Plan ''B'' Plan B [Member] Plan C [Member] Plan ''C'' Plan C [Member] Plan D [Member] Plan ''D'' Plan D [Member] Plan E [Member] Plan "E" Plan E [Member] Plan F [Member] Plan "F" Plan F [Member] Plan G [Member] Plan "G" Plan G. Plan H [Member] Plan "H" Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Common Stock, Capital Shares Reserved for Future Issuance Employees' Stock Option Scheme, equity shares reserved for issuance Common Stock, Reserved for Future Issuance, Value Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved Aggregate nominal value of common shares reserved for future issuance Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Stock-based compensation, options granted Share-Based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Grant Date, Aggregate Intrinsic Value Stock-based compensation, intrinsic value of options exercised at grant date Share-Based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Grant Date, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Stock-based compensation, aggregate intrinsic value of options exercised at exercise date Share-Based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Grant Date, Intrinsic Value Stock-based compensation, aggregate intrinsic value of options outstanding at grant date Share-Based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Grant Date, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Stock-based compensation, aggregate intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Grant Date, Intrinsic Value Stock-based compensation, aggregate intrinsic value of options exercisable at grant date Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Grant Date, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Stock-based compensation, aggregate intrinsic value of options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Stock-based compensation, unvested options, outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price Stock-based compensation, unvested options, weighted average exercise price Share-Based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Grant Date, Aggregate Intrinsic Value Stock-based compensation, unvested options, aggregate intrinsic value at grant date Share-Based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Grant Date, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Aggregate Intrinsic Value Stock-based compensation, unvested options, aggregate intrinsic value as at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Aggregate Intrinsic Value Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Stock-based compensation, total estimated compensation cost to be recognized in future periods Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Stock-based compensation, weighted average period of recognition of total compensation cost not yet recognized (in years) Common Stock Shares Reserved For Future Issuance Aggregate Par Value Common stock shares reserved for future issuance aggregate par value Common stock shares reserved for future issuance aggregate par value. Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Exercisable Weighted Average Remaining Contractual Term 1 Share based compensation by share based award vesting period one Share based compensation arrangement by share based payment award other than options exercisable weighted average remaining contractual term 1. Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Share based compensation by share based award number of shares authorized for grant Stock Based Compensation, Aggregate Intrinsic Value of RSUs Exercisable Stock-based compensation, aggregate intrinsic value of RSUs exercisable Stock-based compensation, aggregate intrinsic value of RSUs exercisable. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average fair value of RSUs granted during the year Share-Based Payment Arrangement, Expense Share-based payment arrangement, expense Share Based Compensation Arrangement By Share based Payment Award Expiration Period Following Vesting Employees' Stock Option Scheme, expiration Period from date of vesting that an equity-based award expires. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding, beginning of period Options outstanding, end of period Number Of Shares Arising Out Of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Share based compensation by share based award options granted during the period Options granted Granted Stock Based Compensation, Aggregate Intrinsic Value of RSUs Exercisable At Grant Date Stock-based compensation, aggregate intrinsic value of RSUs exercisable at grant date Stock-based compensation, aggregate intrinsic value of RSUs exercisable at grant date. Stock Based Compensation, Aggregate Intrinsic Value of RSUs Nonvested At Grant Date Stock-based compensation, aggregate intrinsic value of RSUs non-vested at grant date Stock-based compensation, aggregate intrinsic value of RSUs non-vested at grant date. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Stock-based compensation, aggregate intrinsic value of RSUs non-vested Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Share-based payment arrangement, exercise of option, tax benefit Stock Based Compensation, Aggregate Intrinsic Value of RSUs Exercised At Exercise Date Stock-based compensation, aggregate intrinsic value of RSUs exercised at exercise date Stock-based compensation, aggregate intrinsic value of RSUs exercised at exercise date. Stock Based Compensation, Aggregate Intrinsic Value of RSUs Future Period Stock based compensation, aggregate intrinsic value of RSUs future period Stock based compensation, aggregate intrinsic value of RSUs future period. Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number RSUs outstanding, beginning of period RSUs outstanding, end of period Number of shares arising out of units Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised Exercised Plan Name [Axis] Plan Name [Domain] Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member] Employee Stock Incentive Master Scheme Two Thousand And Twenty Two Employee Stock Incentive Master Scheme Two Thousand And Twenty Two Scheme [Axis] Scheme Scheme [Domain] Scheme Grantor [Axis] Grantor. Grantor [Domain] Grantor. HDFC Life [Member] HDFC life. HDFC AMC [Member] HDFC AMC. HDFC Securities [Member] HDFC securities. HDFC Capital Advisors [Member] HDFC Capital advisors. HDB Financial Services [Member] HDB financial services. Background and Details of the Business Combination [Member] Background and details of the Business Combination. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, lower range Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rate, upper range Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (in years) Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Table] Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions [Line Items] Share Based Compensation By Share Based Award Restricted Stock Units Valuation Assumptions Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, lower range Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility, upper range Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Options available to be granted, beginning of period Options available to be granted, end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period Equity shares allocated for grant under the plan Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Forfeited/lapsed Disclosure In Tabular Form Of Movement In Restricted Stock Units One [Table] Disclosure In Tabular Form Of Movement In Restricted Stock Units One Disclosure In Tabular Form Of Movement In Restricted Stock Units One [Line Items] Disclosure In Tabular Form Of Movement In Restricted Stock Units One Share Based Compensation By Share Based Award Number Of Units Allocted For Grant Out Of Total Number Of Units Available For Grant Equity shares allocated for grant under the plan Share based compensation by share based award number of units allocted for grant out of total number of units available for grant. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs granted Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations Forfeited/lapsed Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Lapsed Share Based Compensation By Share Based Award Options Issued On Account Of Business Combinations Addition on account of eHDFC merger Share based compensation by share based award options issued on account of business combinations. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options outstanding, beginning of period Options outstanding, end of period Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Lapsed Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options exercisable, end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average fair value of options granted during the year Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price Addition on account of eHDFC merger Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options exercisable, end of period Schedule Of Restricted Stock Shares Activity [Table] Schedule of Restricted Stock Shares Activity [Table] Schedule of restricted stock shares activity. Schedule Of Restricted Stock Shares Activity [Line Items] Schedule of Restricted Stock Shares Activity [Line Items] Schedule of restricted stock shares activity. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Expirations Lapsed Share Based Compensation By Share Based Award Equity Instruments Other Than Options Exercisable RSUs exercisable, end of period Share based compensation by share based award equity instruments other than options exercisable. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Outstanding Weighted Average Exercise Price Per Share RSUs outstanding, beginning of period RSUs outstanding, end of period Share Based Compensation By Share Based Award Equity Instruments Other Than Options Outstanding Weighted Average Exercise Price Per Share Share Based Compensation By Share Based Award Equity Instruments Other Than Options Granted During The Weighted Average Exercise Price Per Share Granted Share based compensation by share based award equity instruments other than options granted during the weighted average exercise price per share. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Excercised During The Weighted Average Exercise Price Per Share Exercised Share based compensation by share based award equity instruments other than options excercised during the weighted average exercise price per share. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Forfeited During The Period Weighted Weighted Average Exercise Price Per Share Forfeited Share based compensation by share based award equity instruments other than options forfeited during the period weighted weighted average exercise price per share. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Lapsed During The Period Weighted Average Exercise Price Per Share Lapsed Share based compensation by share based award equity instruments other than options lapsed during the period weighted average exercise price per share. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Excercisable Weighted Average Exercise Price RSUs exercisable, end of period Share based compensation by share based award equity instruments other than options outstanding weighted average exercise price per share. Share-based Payment Arrangement, Option, Exercise Price Range [Table] Share-based Payment Arrangement, Option, Exercise Price Range [Table] Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit Range of exercise price, Lower Range Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit Range of exercise price, Upper Range Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Life Share Based Payment Arrangement Equity Instruments Other Tham Options Exercise Price Range [Table] Share Based Payment Arrangement Equity Instruments Other Tham Options Exercise Price Range Share Based Payment Arrangement Equity Instruments Other Than Options Exercise Price Range [Line Items] Share based payment arrangement equity instruments other than options exercise price range. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Weighted average remaining life (years) Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Outstanding Weighted Average Exercise Price Weighted average exercise price Share based compensation arrangement by share based payment award other than options outstanding weighted average exercise price. Share Based Compensation By Share Based Award Equity Instruments Other Than Options Exercise Price Per Share Lower Limit Share based compensation by share based award equity instruments other than options exercise price per share lower limit Share Based Compensation By Share Based Award Equity Instruments Other Than Options Exercise Price Per Share Lower Limit Centurion Bank of Punjab Limited [Member] Centurion Bank of Punjab Limited Centurion Bank of Punjab Limited [Member] Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Axis] Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Axis] Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain] Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain] Vested Benefit [Member] Vested accumulated benefit obligation Vested Benefit [Member] Superannuation [Member] Superannuation Superannuation [Member] Provident Fund [Member] Provident Fund Provident Fund [Member] National Pension Scheme [Member] National Pension Scheme [Member] National Pension Scheme Member. Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Employee Salary Benefits Payments Period Defined benefit plan, number of days of eligible salary payable for each completed year of service Employee Salary Benefits Payment Equivalent Days Per Completed Year Of Service Deferred Compensation Arrangement with Individual, Requisite Service Period Defined benefit plan, vesting period Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Defined benefit plan, expected contribution to the plan for the next fiscal year Defined Benefit Plan, Accumulated Benefit Obligation Defined benefit plan, accumulated benefit obligation Defined Benefit Plan, Employer Contribution, Percentage Defined benefit plan, employer contribution as a percentage of basic salary Defined Benefit Plan, Employer Contribution, Percentage of Basic Salary Excluding Match of Compensation Defined Benefit Plan, Service Period Defined benefit pension plan, Service period of employees for whom contribution made stand frozen and will be converted into an annuity on separation The period of service, range, of employees for whom contribution made stand frozen to be converted into annuity on separation. Defined Contribution Plan Employer Contribution Percentage Defined contribution plan, employer annual contribution as a percentage of eligible annual salary Defined Contribution Plan, Employer Annual Contribution Percentage Of Eligible Annual Salary Deferred Compensation Arrangement with Individual, Contributions by Employer Defined contribution plan, employer contribution recognized as an expense Defined Contribution Plan, Employer Contribution Rates as Percentage of Employees Eligible Salary Defined contribution plan - contribution to Pension Scheme administered by Regional Provident Fund Commissioner, percentage considered - lower of the percentage of employees eligible salary or fixed amount Defined Contribution Plan Employer Contribution Rates as a Percentage of Employees Eligible Salary Defined Benefit Plan, Plan Assets, Contributions by Employer Employer contributions Defined Benefit Plan Minimum Service Period Needed For Annuity Offer Defined benefit plan minimum service period needed for annuity offer Defined benefit plan minimum service period needed for annuity offer. Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year Defined Benefit Plan, expected past service cost amortization for the next fiscal year Average Remaining Service Period For Past Service Cost Average remaining service period for past service cost. Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Title of Individual [Domain] Management [Member] Managing Director, Executive Directors and for certain employees of CBoP Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Change in benefit obligations: Defined Benefit Plan, Benefit Obligation Projected benefit obligation ("PBO"), beginning of the period Projected benefit obligation, end of the period Defined Benefit Plan, Service Cost Service cost Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Actuarial(gains)/ losses Actuarial (gains)/losses Defined Benefit Plan, Benefit Obligation, Benefits Paid Benefits paid Defined Benefit Plan Prior Service Cost Credit Past service cost Defined benefit plan prior service cost credit. Defined Benefit Plan Obligation Gains Losses On Curtailment (Gains)/Losses on Curtailment Defined benefit plan obligation gains losses on curtailment. Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Change in plan assets: Defined Benefit Plan, Plan Assets, Amount Fair value of plan assets, beginning of the period Fair value of plan assets, end of the period Plan investment assets at fair value Defined Benefit Plan, Expected Return (Loss) on Plan Assets Expected return on plan assets Expected return on plan assets Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit Actuarial gains/(losses) Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Actual return on plan assets Actual return on plan assets Defined Benefit Plan, Plan Assets, Benefits Paid Benefits paid Defined Benefit Plan, Funded (Unfunded) Status of Plan Funded Status Funded Status Defined Benefit Plan, Amortization of Gain (Loss) Actuarial (gains)/losses Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Net gratuity cost Net pension cost Defined Benefit Plan Gains Losses On Curtailment (Gains)/Losses on Curtailment Defined benefit plan gains losses on curtailment. Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Discount rate - net periodic benefit cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Rate of increase in compensation levels of covered employees Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets Rate of return on plan assets Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Benefit payments Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2030 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2031 2031 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 2032 - 2036 2032-2036 Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Funds??Managed By??Company 1 [Member] Funds managed by insurance company (1) Funds Managed By Company 1 [Member] Funds Managed By Company Two [Member] Funds managed by insurance company (2) Funds Managed By Company Two [Member] Funds Managed By Trust [Member] Funds managed by trust Funds Managed By Trust [Member] Defined Benefit Plan, By Plan Assets, Secondary Categories [Axis] Defined Benefit Plan, By Plan Assets, Secondary Categories [Axis] Defined Benefit Plan, By Plan Assets, Secondary Categories [Axis] Defined Benefit Plan, By Plan Assets, Secondary Categories [Domain] Defined Benefit Plan, By Plan Assets, Secondary Categories [Domain] Defined Benefit Plan, By Plan Assets, Secondary Categories [Domain] Government Securities [Member] Government Securities Government Securities [Member] Bonds [Member] Debenture and bonds Tier II bonds Other Plan Assets [Member] Other Other Plan Assets [Member] Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Plan asset as percentage of total funds Weighted-average asset allocation Defined Benefit Plan, Actuarial (Gains) Losses, Net Actuarial gains/(losses) The net increase or decrease of changes in the value of the benefit obligation resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan. Defined Benefit Plan Net Periodic Benefit Cost Credit Increase Decrease For Plan Amendment And Service Cost Service cost Defined benefit plan net periodic benefit cost credit increase decrease for plan amendment and service cost. Defined Benefit Plan, Information about Plan Assets [Abstract] Funds managed by trust Debenture and Bonds Managed by Trust [Member] Debenture and Bonds Managed by Trust Debenture and Bonds Managed by Trust [Member] Other Funds Managed by Trust [Member] Other Funds Managed by Trust Other Funds Managed by Trust [Member] Government Securities Managed by Trust [Member] Government Securities Managed by Trust Government Securities Managed by Trust [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 2 [Member] Fair Value Measurements Using Significant other observable inputs (Level 2) Fair Value, Inputs, Level 3 [Member] Fair Value Measurements Using Significant unobservable inputs (Level 3) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Beginning balance Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Realized interest credited to fund Total gains or losses (realized/unrealized) — Included in net income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Contribution during the period Purchases/additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Amount paid towards claim Settlements Plan Assets [Member] Plan investment funds managed by insurance companies Plan Assets [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Contract [Member] Interest rate derivatives Forward Rate Agreements [Member] Forward rate agreements Forward Rate Agreements [Member] Foreign Exchange Option [Member] Currency options Currency Swap [Member] Currency swaps Foreign Exchange Forward [Member] Forward exchange contracts Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative, Notional Amount Notional Derivative, Fair Value, Net Net Fair Value Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative [Table] Derivative [Table] Derivative [Line Items] Derivative [Line Items] Derivative Asset, Fair Value, Gross Liability Derivative assets, amounts offset Derivative Asset Derivative assets, net amounts reported in the balance sheet Derivative, Collateral, Obligation to Return Securities Derivative assets, financial instruments Derivative, Collateral, Obligation to Return Cash Derivative assets, financial collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative assets, net amount Securities Purchased under Agreements to Resell, Liability Securities purchased under agreements to resell, amounts offset Securities Purchased under Agreements to Resell Securities purchased under agreements to resell, net amounts reported in the balance sheet Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities Securities purchased under agreements to resell, financial instruments Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash Securities purchased under agreements to resell, financial collateral Securities Purchased under Agreements to Resell, Amount Offset Against Collateral Securities purchased under agreements to resell, net amount Derivative Liability, Fair Value, Gross Asset Derivative liabilities, amounts offset Derivative Liability Derivative liabilities, net amounts reported in the balance sheet Derivative, Collateral, Right to Reclaim Securities Derivative liabilities, financial instruments Derivative, Collateral, Right to Reclaim Cash Derivative liabilities, financial collateral Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative liabilities, net amount Securities Sold under Agreements to Repurchase, Asset Securities sold under repurchase agreements, amounts offset Securities Sold under Agreements to Repurchase Securities sold under repurchase agreements, net amounts reported in the balance sheet Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Securities sold under repurchase agreements, financial instruments Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash Securities sold under repurchase agreements, financial collateral Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral Securities sold under repurchase agreements, net amount Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Financial Instruments [Table] Financial Instruments [Table] Financial Instruments [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Financial Instruments [Line Items] Financial Instruments [Line Items] Financial Instruments [Line Items] Guarantees, Fair Value Disclosure Estimated fair values of bank guarantees Estimated fair value Original Margin Asset Margins in the form of cash and fixed deposit available to the bank to reimburse losses realized under guarantees The amount of margin by way cash deposits and fixed deposits available on guarantees. Unused Commitments to Extend Credit Outstanding Undrawn commitments to provide loans and financing to customers Other Commitment Unconditional cancellable commitments Guarantor Obligation, Term Remaining tenure of guarantees outstanding Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Guarantee Obligations [Member] Guarantees Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Financial Guarantee [Member] Financial guarantees Performance Guarantee [Member] Performance guarantees Financial Standby Letter of Credit [Member] Documentary credits Guarantees [Member] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Guarantor Obligations, Current Carrying Value Bank guarantees Allowance for Credit Loss [Abstract] Accounts Receivable, Allowance for Credit Loss Allowance for credit losses, beginning of the period Allowance for credit losses, end of the period Accounts Receivable, Credit Loss Expense (Reversal) Net provision for credit exposures Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets, Fair Value Disclosure [Abstract] Financial Assets: Cash and Cash Equivalents, Fair Value Disclosure Cash and due from banks, and restricted cash Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure Securities purchased under agreements to resell Loans Receivable, Fair Value Disclosure Loans Interest Receivable, Fair Value Disclosure Accrued interest receivable Fair value amount of interest receivable. Other Assets, Fair Value Disclosure Other assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial Assets: Other Assets Excluding Non Financial Instruments Other assets Amount of other assets excluding non financial instruments. Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Financial Liabilities : Accounts Payable and Other Accrued Liabilities Accrued expenses and other liabilities Liabilities On Policies In Force Carrying Value Liabilities on policies in force Liabilities on policies in force carrying value. Liabilities, Fair Value Disclosure [Abstract] Financial Liabilities : Deposits, Fair Value Disclosure Interest and (Non-Interest)-bearing deposits Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Securities sold under repurchase agreements Short-term Debt, Fair Value Short-term borrowings Interest Payable, Fair Value Disclosure Accrued interest payable Fair value amount of interest payable. Long-term Debt, Fair Value Long-term debt Other Liabilities, Fair Value Disclosure Accrued expenses and other liabilities Separate Account, Liability Fair Value Separate account liabilities Fair value amount of separate account, Liability. Liabilities On Policies In Force Fair Value Liabilities on policies in force Amount of liabilities recorded for insurance contract written, Fair value. Interest Bearing Deposits Liabilities [Member] Interest Bearing Deposits Liabilities Interest Bearing Deposits Liabilities [Member] Non Interest Bearing Deposits [Member] Non-interest-bearing deposits Non Interest Bearing Deposits [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Noninterest Expense Including PL Transferred To Undistributed Policyholders Earnings Account Total non-interest expense Total aggregate amount of all noninterest expense net of amount of gains or losses recognized during the reporting period on assets that were transferred to undistributed policyholders earnings account. Employee Benefits and Share-Based Compensation Salaries and staff benefits Other Labor-related Expenses Other than salaries and staff benefits expense Insurance Services Segment [Member] Insurance Services Insurance services segment. Inter Segment Revenue [Axis] Inter-segment revenue. Inter Segment Revenue [Domain] inter-segment revenue. Intersegment Eliminations [Member] Intersegment Eliminations Loss Contingencies [Table] Loss Contingencies [Table] Indirect Taxes And Other Claims [Member] Indirect Taxes And Other Claims Indirect Taxes And Other Claims [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Supply Commitment, Remaining Minimum Amount Committed Capital commitments, estimated amounts of contracts remaining to be executed on the capital account Loss Contingency, Estimate of Possible Loss Contingencies, estimated possible loss Lessee Operating Lease Lease Not Yet Commenced Contract Commitments Additional operating lease commitments with leases which have not yet commenced Lessee operating lease lease not yet commenced contract commitments. Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Additional operating lease commitments with leases which have not yet commenced, lease term Operating Lease, Expense Operating lease expense Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Operating Lease, Cost The total minimum lease expense during the year recognized in the consolidated statements of income Lessee, Operating Lease, Liability, to be Paid, Year Two 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five 2031 Lessee, Operating Lease, Liability, to be Paid, after Year Five Thereafter Lessee, Operating Lease, Liability, to be Paid Total lease payments Operating Lease Interest Expense Less: imputed interest Amount of interest expense on operating lease liability. Lessee, Operating Lease, Remaining Lease Term Weighted average remaining lease term (in years) Operating Lease, Weighted Average Discount Rate, Percent Weighted average discount rate Lessee, Operating Lease, Liability, to be Paid, Year One 2027 SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowance Change [Axis] Valuation Allowance Change [Axis] Valuation Allowance Change [Axis] Valuation Allowance Change [Domain] Valuation Allowance Change [Domain] Valuation Allowance Change [Domain] Change in Rate of Accrual of Reward Points [Member] Change in Rate of Accrual of Reward Points Change in Rate of Accrual of Reward Points [Member] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Debit and Credit Cards Reward Points [Member] Credit card and debit card reward points Debit and Credit Cards Reward Points [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Opening provision of reward points Closing provision of reward points SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Provision made during the year SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Utilization/write back of provision SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment Effect of change in rate of accrual of reward points Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Accounts Payable and Accrued Liabilities Accrued expenses and other liabilities Other Accrued Liabilities Total Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity [Member] Others Related Party [Member] Related Party Loans and Leases Receivable, Related Parties Loans Other Assets, Current Other assets Receivable, Investment, Sale Investments available for sale securities Related Party Transaction, Purchases from Related Party Fixed assets purchased from related parties Payments to Acquire Other Investments Purchase of investments from others Proceeds from Sale of Other Investments Sale of investments from others Percentage of Capital Acquired through amalgamation Percentage of Capital Acquired through amalgamation Percentage of capital acquired through amalgamation. Principal Owner [Member] Principal Owner Property, Plant and Equipment [Member] Property Plant and equipment Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Non-Interest Revenue-Fees and Commissions [Member] Non-Interest Revenue-Fees and Commissions Non-Interest Revenue-Fees and Commissions [Member] Interest and Dividend [Member] Interest and Dividend Revenue Interest and Dividend [Member] Administrative and Other [Member] Non-interest expense-Administrative and other Administrative and Other [Member] Premises And Equipment [Member] Non-interest expense-Premises and equipment Premises And Equipment [Member] Noninterest Income, Other Non-interest revenue-Others Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potential equity shares excluded from the calculation of diluted earnings per share, average outstanding balance Percentage of Income Transferred To Retained Earnings Appropriated For Legal Reserve Required transfer of after tax Indian GAAP profit to a non-distributable statutory reserve in order to pay dividends without prior RBI approval Percentage of after tax Indian GAAP profit required transfer to a non-distributable statutory reserve for payment of dividends without prior RBI approval. Dividends Payable, Amount Per Share Dividends declared Dividends Payable, Amount Per Share Statutory Dividend Payment Restrictions Disclosure Dividend payout, description of restrictions Statutory Accounting Practices, Net Income Available for Dividends Dividend payout, maximum pay out as a percentage of net income calculated under Indian GAAP Maximum amount of Dividend payout as a percentage of net income under Indian GAAP. Stock Dividends Issued Per Share Disclosure Stock dividends issued per share disclosure Disclosure of stock dividends issued to existing shareholders, where additional equity shares are allotted based on shares held as of the record date. Jurisdiction [Axis] Jurisdiction [Axis] Statutory Accounting Practices, Jurisdiction [Domain] Statutory Accounting Practices, Jurisdiction [Domain] Indian GAAP [Member] Indian GAAP [Member] Dividends [Axis] Dividends [Axis] Dividends [Domain] Dividends [Domain] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Dividend Payment [Axis] Dividend Payment [Domain] Special Interim Dividend Pre Bonus [Member] Schedule of Weighted Average Number of Diluted Shares Outstanding [Table] Schedule of Weighted Average Number of Diluted Shares Outstanding [Table] Schedule of Weighted Average Number of Diluted Shares Outstanding [Table] Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items] Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items] Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items] Weighted Average Number of Shares Outstanding, Basic Weighted average number of equity shares used in computing basic earnings per equity share Weighted Average Number Diluted Shares Outstanding Adjustment Effect of potential equity shares for stock options outstanding Weighted Average Number of Shares Outstanding, Diluted Weighted average number of equity shares used in computing diluted earnings per equity share Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Share-based Payment Arrangement [Member] Stock Compensation Plan Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Line Items] Earnings Per Share, Diluted, Adjustment Effect of potential equity shares for stock options outstanding Effect on earnings per share of potential equity shares for stock options. American Depository Shares [Member] American Depository Shares American Depository Shares [Member] Schedule of Equity Method Investments [Table] HDFC Securities Limited [Member] HDFC Securities Limited HDFC Securities limited. HDFC Life Insurance Company Limited [Member] HDFC Life Insurance Company Limited HDFC Life insurance company limited. HDFC Asset Management Company Limited [Member] HDFC Asset Management Company Limited HDFC Asset management company limited. HDFC Sales Private Limited [Member] HDFC Sales Private Limited HDFC Sales private limited HDFC Capital Advisors Limited [Member] HDFC Capital Advisors Limited HDFC Capital advisors limited. HDFC Trustee Company Limited [Member] HDFC Trustee Company Limited HDFC Trustee company limited. Griha Investment [Member] Griha Investment Griha Investment. Griha Pte Limited [Member] Griha Pte. Limited Griha Pte limited. Schedule of Equity Method Investments [Line Items] Description Of Business Background Description of business. Equity and Non Equity Ownership Interests [Table] Equity and non equity ownership interests. Equity and Non Equity Ownership Interests [Line Items] Equity and non equity ownership interests. Equity Method Investment, Description of Principal Activities Equity method investment, description of principal activities HDFC ERGO General Insurance Company Limited [Member] HDFC ERGO General Insurance Company Limited HDFC ERGO General insurance company limited. Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Equity Securities, FV-NI Equity securities Assets, Fair Value Disclosure Total Labilities On Policies In Force Liabilities on policies in force Amount of liabilities recorded on insurance contract written. Financial Liabilities Fair Value Disclosure Total Other Securities At Fair Value Other securities Other securities at fair value. Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value, Recurring [Member] Fair Value, Measurements, Recurring Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Total gains or losses (realized/unrealized) — Included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Transfers into Level 3 Equity securities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Transfers out of Level 3 Equity securities with a fair value Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments Foreign currency translation adjustment Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Total amount of gains/ (losses) included in net income attributable to change in unrealized gains/ (losses) relating to assets still held at reporting date Marketable Securities, Unrealized Gain (Loss) Change in unrealized gains/ (losses) for the period included in other comprehensive income for assets held at the end of the reporting period Transfers From (To) Parent [Abstract] Transfers From (To) Parent [Abstract] Subsequent Event [Table] Subsequent Event [Table] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividends Payable Dividends Payable Debt Instrument, Face Amount Debt Instrument, Maturity Date Subsequent Event [Member] Subsequent Event [Member] Event [Axis] Event. Event [Domain] Event. Foreign Tax Jurisdiction [Member]