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Loans by Facility (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2022 INR (₨) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 INR (₨) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 INR (₨) | Mar. 31, 2019 INR (₨)
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | ₨ 14,409,544.0 | $ 189,924.1 | ₨ 12,043,717.9 |  |  |
Less: Allowance for credit losses | 372,671.8 | 4,911.9 | 343,528.7 | $ 4,527.9 | ₨ 198,833.2 | ₨ 148,232.0
Total | 14,036,872.2 | 185,012.2 | 11,700,189.2 |  |  |
Auto loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 41,769.4 |  | 39,396.1 |  | 19,219.0 |
Personal loans/Credit card |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 111,566.4 |  | 110,081.0 |  | 47,097.1 |
Retail Business Banking |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 49,055.0 |  | 42,288.4 |  | 32,860.3 |
Commercial vehicle and construction equipment finance |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 31,750.9 |  | 26,356.7 |  | 20,463.4 |
Housing loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 2,692.2 |  | 4,578.0 |  | 1,700.7 |
Other Retail |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: Allowance for credit losses | 61,437.0 |  | 49,229.2 |  | 37,864.3 |
Retail Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 9,310,534.7 | 122,716.9 | 7,828,832.6 |  |  |
Retail Loans | Auto loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,042,793.0 | 13,744.5 | 964,053.2 |  |  |
Retail Loans | Personal loans/Credit card |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 2,341,971.8 | 30,868.2 | 2,042,727.2 |  |  |
Retail Loans | Retail Business Banking |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 2,617,087.1 | 34,494.4 | 2,007,845.9 |  |  |
Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 951,066.0 | 12,535.5 | 805,329.8 |  |  |
Retail Loans | Housing loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 830,882.4 | 10,951.4 | 702,235.5 |  |  |
Retail Loans | Other Retail |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,526,734.4 | 20,122.9 | 1,306,641.0 |  |  |
Wholesale loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 5,099,009.3 | $ 67,207.2 | 4,214,885.3 |  |  |
Less: Allowance for credit losses | ₨ 74,400.9 |  | ₨ 71,599.3 |  | ₨ 39,628.4 |

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