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Loans - Loans by Facility (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 INR (₨) | Mar. 31, 2022 INR (₨)
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | ₨ 28,638,811.1 | $ 335,231.3 | ₨ 26,793,047.4 |  |  |
Less: Allowance for credit losses | 535,829.3 | 6,272.1 | 457,346.5 | $ 5,353.4 | ₨ 365,164.5 | ₨ 372,671.8
Total | 28,102,981.8 | 328,959.2 | 26,335,700.9 |  |  |
Auto loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 37,447.6 |  | 29,948.9 |  | 33,835.5 | 41,769.4
Personal loans/Credit card |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 135,769.7 |  | 116,999.6 |  | 99,634.4 | 111,566.4
Retail business banking |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 97,669.1 |  | 75,300.5 |  | 63,974.8 | 49,055.0
Commercial vehicle and construction equipment finance |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 38,049.2 |  | 32,096.1 |  | 31,130.6 | 31,750.9
Housing loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 15,520.9 |  | 9,906.8 |  | 3,269.9 | 2,692.2
Other retail loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 111,682.5 |  | 80,453.8 |  | 72,012.4 | 61,437.0
Retail Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 21,531,565.4 | 252,037.5 | 19,590,408.1 |  |  |
Retail Loans | Auto loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,550,907.4 | 18,154.1 | 1,378,523.1 |  |  |
Retail Loans | Personal loans/Credit card |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 3,426,193.3 | 40,105.3 | 3,119,246.7 |  |  |
Retail Loans | Retail business banking |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 4,967,690.0 | 58,149.2 | 4,207,836.2 |  |  |
Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,862,193.6 | 21,797.9 | 1,619,602.9 |  |  |
Retail Loans | Housing loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 7,141,179.0 | 83,591.0 | 6,993,168.0 |  |  |
Retail Loans | Other retail loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 2,583,402.1 | 30,240.0 | 2,272,031.2 |  |  |
Wholesale loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 7,107,245.7 | $ 83,193.8 | 7,202,639.3 |  |  |
Less: Allowance for credit losses | ₨ 99,690.3 |  | ₨ 112,640.8 |  | ₨ 61,306.9 | ₨ 74,400.9

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