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Allowance for Credit Losses (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2021 INR (₨) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 INR (₨) | Mar. 31, 2019 INR (₨) | Mar. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | ₨ 198,833.2 |  | $ 2,718.7 |  | ₨ 148,232.0 |  | ₨ 112,507.2 |  |
Write-offs |  | (119,470.7) |  | (1,633.5) |  | (92,679.6) |  | (53,331.6) |  |
Net allowance for credit losses |  | 183,153.2 | [1] | 2,504.1 | [1] | 143,280.8 | [2] | 89,056.4 | [3] |
Allowance for credit losses, end of the period |  | 343,528.7 |  | 4,696.9 |  | 198,833.2 |  | 148,232.0 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 36,933.6 |  |  |  | 26,426.4 |  | 20,233.2 |  | $ 505.0
Allowance collectively evaluated for impairment |  | 306,595.1 |  |  |  | 172,406.8 |  | 127,998.8 |  | 4,191.9
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 46,553.7 |  |  |  | 35,423.4 |  | 38,153.7 |  | 636.5
Loans collectively evaluated for impairment |  | 11,997,164.2 |  |  |  | 10,588,432.2 |  | 9,073,310.9 |  | $ 164,030.2
Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 81,013.0 |  | $ 1,107.6 |  |  |  |  |  |
Auto loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 19,219.0 |  |  |  |  |  |  |  |
Write-offs |  | (13,263.5) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 23,559.7 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 39,396.1 |  |  |  | 19,219.0 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 34.7 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 39,361.4 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 49.5 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 964,003.7 |  |  |  |  |  |  |  |
Auto loans | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 9,880.9 |  |  |  |  |  |  |  |
Personal loans/Credit card |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 47,097.1 |  |  |  |  |  |  |  |
Write-offs |  | (61,571.8) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 86,464.6 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 110,081.0 |  |  |  | 47,097.1 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 4.0 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 110,077.0 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 4.2 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 2,042,723.0 |  |  |  |  |  |  |  |
Personal loans/Credit card | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 38,091.1 |  |  |  |  |  |  |  |
Retail Business Banking |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 32,860.3 |  |  |  |  |  |  |  |
Write-offs |  | (14,951.6) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 20,432.2 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 42,288.4 |  |  |  | 32,860.3 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 3,540.7 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 38,747.7 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 3,560.8 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 2,004,285.1 |  |  |  |  |  |  |  |
Retail Business Banking | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 3,947.5 |  |  |  |  |  |  |  |
Commercial vehicle and construction equipment finance |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 20,463.4 |  |  |  |  |  |  |  |
Write-offs |  | (15,921.5) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 21,489.3 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 26,356.7 |  |  |  | 20,463.4 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 59.6 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 26,297.1 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 59.7 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 805,270.1 |  |  |  |  |  |  |  |
Commercial vehicle and construction equipment finance | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 325.5 |  |  |  |  |  |  |  |
Housing loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 1,700.7 |  |  |  |  |  |  |  |
Write-offs |  | (190.8) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 1,408.6 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 4,578.0 |  |  |  | 1,700.7 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 0.0 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 4,578.0 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 702,235.5 |  |  |  |  |  |  |  |
Housing loans | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 1,659.5 |  |  |  |  |  |  |  |
Other Retail |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 37,864.3 |  |  |  |  |  |  |  |
Write-offs |  | (9,942.8) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 21,073.4 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 49,229.2 |  |  |  | 37,864.3 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 72.1 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 49,157.1 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 92.7 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 1,306,548.3 |  |  |  |  |  |  |  |
Other Retail | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 234.3 |  |  |  |  |  |  |  |
Wholesale loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 39,628.4 |  |  |  |  |  |  |  |
Write-offs |  | (3,628.7) |  |  |  |  |  |  |  |
Net allowance for credit losses | [1] | 8,725.4 |  |  |  |  |  |  |  |
Allowance for credit losses, end of the period |  | 71,599.3 |  |  |  | 39,628.4 |  |  |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  | 33,222.5 |  |  |  |  |  |  |  |
Allowance collectively evaluated for impairment |  | 38,376.8 |  |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  | 42,786.8 |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  | 4,172,098.5 |  |  |  |  |  |  |  |
Wholesale loans | Impact of ASC 326 Adoption |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Impact of Adopting ASC 326 |  | 26,874.2 |  |  |  |  |  |  |  |
Specific allowance for credit losses | Retail Loans | Auto loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 7,814.5 |  |  |  | 6,169.0 |  | 3,682.2 |  |
Write-offs |  |  |  |  |  | (11,524.3) |  | (9,155.3) |  |
Net allowance for credit losses |  |  |  |  |  | 13,169.8 | [2] | 11,642.1 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 7,814.5 |  | 6,169.0 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 7,814.5 |  | 6,169.0 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 15,279.2 |  | 13,606.7 |  |
Specific allowance for credit losses | Retail Loans | Personal loans/Credit card |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 8,535.1 |  |  |  | 9,694.0 |  | 6,182.6 |  |
Write-offs |  |  |  |  |  | (41,646.3) |  | (25,197.0) |  |
Net allowance for credit losses |  |  |  |  |  | 40,487.4 | [2] | 28,708.4 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 8,535.1 |  | 9,694.0 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  |  |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 8,535.1 |  | 9,694.0 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 14,481.7 |  | 15,781.5 |  |
Specific allowance for credit losses | Retail Loans | Retail Business Banking |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 21,687.4 |  |  |  | 21,595.3 |  | 18,709.4 |  |
Write-offs |  |  |  |  |  | (9,379.0) |  | (6,665.5) |  |
Net allowance for credit losses |  |  |  |  |  | 9,471.1 | [2] | 9,551.4 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 21,687.4 |  | 21,595.3 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 21,687.4 |  | 21,595.3 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 32,866.3 |  | 29,945.0 |  |
Specific allowance for credit losses | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 11,607.3 |  |  |  | 6,544.8 |  | 4,806.1 |  |
Write-offs |  |  |  |  |  | (10,838.5) |  | (4,812.8) |  |
Net allowance for credit losses |  |  |  |  |  | 15,901.0 | [2] | 6,551.5 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 11,607.3 |  | 6,544.8 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 11,607.3 |  | 6,544.8 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 22,992.2 |  | 11,254.9 |  |
Specific allowance for credit losses | Retail Loans | Housing loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 1,414.7 |  |  |  | 1,105.2 |  | 974.4 |  |
Write-offs |  |  |  |  |  | (130.3) |  | (93.3) |  |
Net allowance for credit losses |  |  |  |  |  | 439.8 | [2] | 224.1 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 1,414.7 |  | 1,105.2 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 1,414.7 |  | 1,105.2 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 2,921.3 |  | 2,157.1 |  |
Specific allowance for credit losses | Retail Loans | Other Retail |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 24,116.5 |  |  |  | 20,441.5 |  | 12,922.8 |  |
Write-offs |  |  |  |  |  | (12,833.1) |  | (5,652.0) |  |
Net allowance for credit losses |  |  |  |  |  | 16,508.1 | [2] | 13,170.7 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 24,116.5 |  | 20,441.5 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 24,116.5 |  | 20,441.5 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 33,462.8 |  | 29,523.6 |  |
Specific allowance for credit losses | Wholesale loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 26,426.4 |  |  |  | 20,233.2 |  | 15,323.0 |  |
Write-offs |  |  |  |  |  | (6,328.1) |  | (1,755.7) |  |
Net allowance for credit losses |  |  |  |  |  | 12,521.3 | [2] | 6,665.9 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 26,426.4 |  | 20,233.2 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  | 26,426.4 |  | 20,233.2 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 35,423.4 |  | 38,153.7 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Unallocated allowance for credit losses | Retail Loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | 84,029.4 |  |  |  | 52,941.1 |  | 42,147.4 |  |
Write-offs |  |  |  |  |  | 0.0 |  | 0.0 |  |
Net allowance for credit losses |  |  |  |  |  | 31,088.3 | [2] | 10,793.7 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 84,029.4 |  | 52,941.1 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  |  |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 84,029.4 |  | 52,941.1 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  |  |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | 6,918,796.9 |  | 6,135,634.8 |  |
Unallocated allowance for credit losses | Wholesale loans |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |
Allowance for credit losses, beginning of the period |  | ₨ 13,201.9 |  |  |  | 9,507.9 |  | 7,759.3 |  |
Write-offs |  |  |  |  |  | 0.0 |  | 0.0 |  |
Net allowance for credit losses |  |  |  |  |  | 3,694.0 | [2] | 1,748.6 | [3] |
Allowance for credit losses, end of the period |  |  |  |  |  | 13,201.9 |  | 9,507.9 |  |
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |
Allowance individually evaluated for impairment |  |  |  |  |  |  |  | 0.0 |  |
Allowance collectively evaluated for impairment |  |  |  |  |  | 13,201.9 |  | 9,507.9 |  |
Loans: |  |  |  |  |  |  |  |  |  |
Loans individually evaluated for impairment |  |  |  |  |  | 0.0 |  | 0.0 |  |
Loans collectively evaluated for impairment |  |  |  |  |  | ₨ 3,547,631.8 |  | ₨ 2,835,407.3 |  |
[1] | Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs 28,919.8 million (US$ 395.4 million). Recoveries from retail loans is Rs. 28,605.8 million and from wholesale loans is Rs. 314.0 million.
[2] | Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs 25,658.9 million. Recoveries from retail loans is Rs. 22,548.7 million and from wholesale loans is Rs. 3,110.2 million.
[3] | Net allowances for credit losses charged to expense does not include the recoveries against write-off cases amounting to Rs 16,777.1 million . Recoveries from retail loans is Rs. 16,590.9 million and from wholesale loans is Rs. 186.2 million.

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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