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Loans by Facility (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2020 INR (₨) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 INR (₨) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 INR (₨) | Mar. 31, 2017 INR (₨)
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | ₨ 10,623,855.6 | $ 140,918.6 | ₨ 9,111,464.6 |  |  |
Less: Allowance for credit losses | 198,833.2 | 2,637.4 | 148,232.0 | $ 1,966.2 | ₨ 112,507.2 | ₨ 78,496.9
Total | 10,425,022.4 | 138,281.2 | 8,963,232.6 |  |  |
Retail Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 7,040,800.4 | 93,391.6 | 6,237,903.6 |  |  |
Retail Loans | Auto loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 952,053.1 | 12,628.4 | 951,744.2 |  |  |
Retail Loans | Personal loans/Credit card |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,920,601.6 | 25,475.5 | 1,538,107.4 |  |  |
Retail Loans | Retail Business Banking |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,658,770.3 | 22,002.5 | 1,478,317.8 |  |  |
Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 747,382.4 | 9,913.5 | 746,288.0 |  |  |
Retail Loans | Housing loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 634,612.4 | 8,417.7 | 513,771.6 |  |  |
Retail Loans | Other Retail |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,127,380.6 | 14,954.0 | 1,009,674.6 |  |  |
Wholesale loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | ₨ 3,583,055.2 | $ 47,527.0 | ₨ 2,873,561.0 |  |  |

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