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Cover Page
 12 Months Ended
Mar. 31, 2023
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Mar. 31, 2023
Document Fiscal Year Focus 2023
Document Fiscal Period Focus FY
Trading Symbol HDB
Entity Registrant Name HDFC BANK LIMITED
Entity Central Index Key 0001144967
Current Fiscal Year End Date --03-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 5,579,742,786
Security Exchange Name NYSE
Title of 12(b) Security American Depositary Shares, each representing three Equity Shares, Par value Rs. 1.0 per share
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Entity Interactive Data Current Yes
Entity File Number 001-15216
Entity Incorporation, State or Country Code K7
Entity Address, Address Line One HDFC Bank House
Entity Address, Address Line Two Senapati Bapat Marg, Lower Parel
Entity Address, City or Town Mumbai
Entity Address, Postal Zip Code 400013
Entity Address, Country IN
Document Registration Statement false
Document Accounting Standard U.S. GAAP
ICFR Auditor Attestation Flag true
Auditor Name KPMG Assurance and Consulting Services LLP
Auditor Location Mumbai, India
Auditor Firm ID 2115
Business Contact [Member]  
Document Information [Line Items]  
Contact Personnel Name Santosh Haldankar
Contact Personnel Email Address Santosh.Haldankar@hdfcbank.com
Entity Address, Address Line One HDFC Bank Ltd; Legal & Secretarial Dept; 2nd floor, Zenith House
Entity Address, Address Line Two Opp. Race Course Gate No. 5 & 6, Keshavrao Khadye Marg
Entity Address, Address Line Three Mahalaxmi (west)
Entity Address, City or Town Mumbai
Entity Address, Postal Zip Code 400 034
Entity Address, Country IN
Country Region 91
City Area Code 22
Local Phone Number 3976-0711