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Goodwill and Intangible Assets - Additional Information (Detail) ₨ in Millions, $ in Millions					12 Months Ended
	Mar. 19, 2024 INR (₨)	Mar. 19, 2024 USD ($)	Jul. 01, 2023 INR (₨)	Jul. 01, 2023 USD ($)	Mar. 31, 2024 INR (₨)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 INR (₨)	Mar. 31, 2022 INR (₨)	Mar. 31, 2024 USD ($)	Jul. 01, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite lived intangible assets amortization					₨ 21,201.0	$ 254.4	₨ 0.0	₨ 0.0
Good will written off related to sale of business unit					73,576.1	$ 882.9
Good willI mpairment Loss					0.0
Goodwill					1,629,510.3		₨ 74,937.9	₨ 74,937.9	$ 19,552.6		$ 899.3	$ 899.3
eHDFC [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill			₨ 1,628,148.5		1,628,148.5				$ 19,536.2	$ 19,536.2
HDFC Credila Financial Services Limited [Member] | eHDFC [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Good will written off related to sale of business unit	₨ 73,576.1	$ 882.9	₨ 73,576.1	$ 882.8
Depreciation And Amortization [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite lived intangible assets amortization					₨ 21,201.0

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Finite and indefinite lived intangible assets.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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