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Bank Overview - Additional Information (Detail) - ₨ / shares	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Sep. 20, 2019	Sep. 19, 2019
Nature Of Business [Line Items]
Shares issued, price per share			₨ 1
Equity shares, issued	5,545,540,976	5,512,776,482	5,470,763,894
Equity shares, par value	₨ 1	₨ 1	₨ 1	₨ 2
Housing Development Finance Corporation Limited
Nature Of Business [Line Items]
Equity ownership interest of the bank's largest shareholder	21.00%	21.10%

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Nature Of Business [Line Items]

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Face amount or stated value per share of common stock.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
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Per share or per unit amount of equity securities issued.

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