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Loans - Summary of Gross Loans Origination and Internally Assigned Credit Risk Ratings (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨)
--- | --- | --- | ---
Retail loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | ₨ 1,660,541.8 | $ 19,437.5 | ₨ 1,517,172.2
Before four years | 738,109.8 | 8,639.9 | 737,926.2
Before three years | 1,436,058.8 | 16,809.8 | 1,063,060.5
Before two years | 2,547,190.8 | 29,816.1 | 2,153,627.5
Before one years | 4,152,270.9 | 48,604.4 | 3,726,120.8
Current | 5,338,591.4 | 62,490.8 | 5,536,503.1
Revolving Loans | 5,231,263.8 | 61,234.5 | 4,489,936.0
Revolving loans converted to term loans | 427,538.1 | 5,004.5 | 366,061.8
Total | 21,531,565.4 | 252,037.5 | 19,590,408.1
Retail loans | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 13,553.2 | 158.6 | 18,759.7
Before four years | 5,125.7 | 60.0 | 14,440.6
Before three years | 11,729.4 | 137.3 | 8,618.8
Before two years | 29,815.6 | 349.0 | 16,233.9
Before one years | 30,013.6 | 351.3 | 24,209.1
Current | 8,099.5 | 94.8 | 3,632.3
Revolving Loans | 30,051.8 | 351.8 | 25,837.7
Revolving loans converted to term loans | 16,801.6 | 196.7 | 13,679.9
Total | 145,190.4 | 1,699.5 | 125,412.0
Retail loans | Auto loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 17,996.6 |  | 17,086.4
Before four years | 39,541.4 |  | 42,112.7
Before three years | 111,933.8 |  | 88,862.3
Before two years | 265,204.1 |  | 201,625.1
Before one years | 406,692.1 |  | 402,140.9
Current | 612,616.8 |  | 541,384.9
Revolving Loans | 96,922.6 |  | 85,310.8
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 1,550,907.4 |  | 1,378,523.1
Retail loans | Auto loans | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,490.5 |  | 1,376.8
Before four years | 1,103.9 |  | 1,913.2
Before three years | 1,768.9 |  | 1,683.1
Before two years | 2,771.3 |  | 1,835.8
Before one years | 2,057.7 |  | 1,688.5
Current | 394.4 |  | 150.7
Revolving Loans | 0.0 |  | 0.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 9,586.7 |  | 8,648.1
Retail loans | Personal loans/Credit card |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 7,225.9 |  | 4,925.6
Before four years | 20,096.4 |  | 29,598.6
Before three years | 102,481.1 |  | 64,272.4
Before two years | 325,240.5 |  | 240,817.4
Before one years | 629,413.2 |  | 648,273.2
Current | 1,241,263.4 |  | 1,195,151.2
Revolving Loans | 672,934.7 |  | 570,146.5
Revolving loans converted to term loans | 427,538.1 |  | 366,061.8
Total | 3,426,193.3 |  | 3,119,246.7
Retail loans | Personal loans/Credit card | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 2,263.9 |  | 1,681.8
Before four years | 1,559.0 |  | 4,635.9
Before three years | 5,988.1 |  | 3,526.2
Before two years | 18,451.4 |  | 10,050.8
Before one years | 21,504.4 |  | 17,073.2
Current | 4,065.9 |  | 2,838.5
Revolving Loans | 25,111.9 |  | 21,307.8
Revolving loans converted to term loans | 16,801.6 |  | 13,679.9
Total | 95,746.2 |  | 74,794.1
Retail loans | Retail business banking |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 90,286.8 |  | 96,212.4
Before four years | 62,968.2 |  | 64,673.1
Before three years | 208,322.2 |  | 111,742.4
Before two years | 406,185.5 |  | 319,787.1
Before one years | 629,013.4 |  | 528,704.6
Current | 770,115.0 |  | 701,737.8
Revolving Loans | 2,800,798.9 |  | 2,384,978.8
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 4,967,690.0 |  | 4,207,836.2
Retail loans | Retail business banking | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,382.6 |  | 1,163.3
Before four years | 176.1 |  | 298.8
Before three years | 270.1 |  | 138.6
Before two years | 39.7 |  | 19.7
Before one years | 44.5 |  | 0.2
Current | 125.9 |  | 0.0
Revolving Loans | 22.1 |  | 9.5
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 2,061.0 |  | 1,630.1
Retail loans | Commercial vehicle and construction equipment finance |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 10,522.3 |  | 12,612.6
Before four years | 8,530.3 |  | 17,986.3
Before three years | 64,391.4 |  | 36,439.4
Before two years | 270,486.3 |  | 159,942.5
Before one years | 516,036.3 |  | 461,582.2
Current | 741,055.6 |  | 723,662.0
Revolving Loans | 251,171.4 |  | 207,377.9
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 1,862,193.6 |  | 1,619,602.9
Retail loans | Commercial vehicle and construction equipment finance | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,242.2 |  | 1,547.1
Before four years | 853.3 |  | 2,379.5
Before three years | 2,499.5 |  | 1,597.7
Before two years | 4,319.4 |  | 2,231.2
Before one years | 2,794.0 |  | 1,935.0
Current | 2,555.9 |  | 104.3
Revolving Loans | 6.0 |  | 1.3
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 14,270.3 |  | 9,796.1
Retail loans | Housing loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,513,385.3 |  | 1,373,409.5
Before four years | 596,492.3 |  | 572,124.7
Before three years | 917,561.9 |  | 741,491.1
Before two years | 1,189,865.8 |  | 1,175,303.7
Before one years | 1,630,476.8 |  | 1,480,508.1
Current | 1,293,396.9 |  | 1,650,330.9
Revolving Loans | 0.0 |  | 0.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 7,141,179.0 |  | 6,993,168.0
Retail loans | Housing loans | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 3,091.7 |  | 11,133.4
Before four years | 477.1 |  | 759.5
Before three years | 79.8 |  | 105.6
Before two years | 5.1 |  | 7.5
Before one years | 23.0 |  | 7.2
Current | 0.0 |  | 0.0
Revolving Loans | 0.0 |  | 0.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 3,676.7 |  | 12,013.2
Retail loans | Other retail loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 21,124.9 |  | 12,925.7
Before four years | 10,481.2 |  | 11,430.8
Before three years | 31,368.4 |  | 20,252.9
Before two years | 90,208.6 |  | 56,151.7
Before one years | 340,639.1 |  | 204,911.8
Current | 680,143.7 |  | 724,236.3
Revolving Loans | 1,409,436.2 |  | 1,242,122.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 2,583,402.1 |  | 2,272,031.2
Retail loans | Other retail loans | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 4,082.3 |  | 1,857.3
Before four years | 956.3 |  | 4,453.7
Before three years | 1,123.0 |  | 1,567.6
Before two years | 4,228.7 |  | 2,088.9
Before one years | 3,590.0 |  | 3,505.0
Current | 957.4 |  | 538.8
Revolving Loans | 4,911.8 |  | 4,519.1
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 19,849.5 |  | 18,530.4
Retail loans | Performing | Auto loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 16,872.3 |  | 15,314.7
Before four years | 38,368.9 |  | 40,203.8
Before three years | 109,709.7 |  | 86,953.7
Before two years | 261,060.2 |  | 198,895.3
Before one years | 403,060.5 |  | 398,936.3
Current | 611,564.6 |  | 540,605.2
Revolving Loans | 93,911.1 |  | 82,616.1
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 1,534,547.3 |  | 1,363,525.1
Retail loans | Performing | Personal loans/Credit card |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 6,682.8 |  | 4,198.8
Before four years | 19,129.5 |  | 28,112.1
Before three years | 100,673.9 |  | 62,604.2
Before two years | 320,434.6 |  | 237,689.5
Before one years | 623,756.2 |  | 642,360.7
Current | 1,238,873.6 |  | 1,192,606.3
Revolving Loans | 661,166.9 |  | 560,472.3
Revolving loans converted to term loans | 426,548.1 |  | 365,736.3
Total | 3,397,265.6 |  | 3,093,780.2
Retail loans | Performing | Retail business banking |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 84,507.8 |  | 88,129.0
Before four years | 59,255.0 |  | 62,739.9
Before three years | 204,872.5 |  | 108,288.3
Before two years | 402,892.1 |  | 317,668.3
Before one years | 627,467.3 |  | 527,853.5
Current | 769,923.2 |  | 701,602.8
Revolving Loans | 2,750,841.8 |  | 2,348,199.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 4,899,759.7 |  | 4,154,480.8
Retail loans | Performing | Commercial vehicle and construction equipment finance |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 9,615.7 |  | 9,984.2
Before four years | 7,142.1 |  | 16,357.7
Before three years | 61,927.7 |  | 33,797.5
Before two years | 263,199.8 |  | 156,354.0
Before one years | 507,988.5 |  | 456,722.6
Current | 739,656.0 |  | 722,457.1
Revolving Loans | 244,293.4 |  | 202,366.2
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 1,833,823.2 |  | 1,598,039.3
Retail loans | Performing | Housing loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,488,044.3 |  | 1,351,187.2
Before four years | 590,450.9 |  | 565,617.9
Before three years | 910,615.5 |  | 735,921.2
Before two years | 1,182,559.1 |  | 1,170,433.9
Before one years | 1,626,523.9 |  | 1,476,703.5
Current | 1,292,823.4 |  | 1,649,591.6
Revolving Loans | 0.0 |  | 0.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 7,091,017.1 |  | 6,949,455.3
Retail loans | Performing | Other retail loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 15,220.9 |  | 9,040.5
Before four years | 9,225.1 |  | 9,538.8
Before three years | 29,591.7 |  | 18,091.4
Before two years | 84,335.1 |  | 53,746.1
Before one years | 312,070.2 |  | 200,858.5
Current | 676,203.4 |  | 721,107.1
Revolving Loans | 1,366,920.4 |  | 1,198,128.8
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 2,493,566.8 |  | 2,210,511.2
Retail loans | Non-performing | Auto loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 1,124.3 |  | 1,771.7
Before four years | 1,172.5 |  | 1,908.9
Before three years | 2,224.1 |  | 1,908.6
Before two years | 4,143.9 |  | 2,729.8
Before one years | 3,631.6 |  | 3,204.6
Current | 1,052.2 |  | 779.7
Revolving Loans | 3,011.5 |  | 2,694.7
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 16,360.1 |  | 14,998.0
Retail loans | Non-performing | Personal loans/Credit card |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 543.1 |  | 726.8
Before four years | 966.9 |  | 1,486.5
Before three years | 1,807.2 |  | 1,668.2
Before two years | 4,805.9 |  | 3,127.9
Before one years | 5,657.0 |  | 5,912.5
Current | 2,389.8 |  | 2,544.9
Revolving Loans | 11,767.8 |  | 9,674.2
Revolving loans converted to term loans | 990.0 |  | 325.5
Total | 28,927.7 |  | 25,466.5
Retail loans | Non-performing | Retail business banking |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 5,779.0 |  | 8,083.4
Before four years | 3,713.2 |  | 1,933.2
Before three years | 3,449.7 |  | 3,454.1
Before two years | 3,293.4 |  | 2,118.8
Before one years | 1,546.1 |  | 851.1
Current | 191.8 |  | 135.0
Revolving Loans | 49,957.1 |  | 36,779.8
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 67,930.3 |  | 53,355.4
Retail loans | Non-performing | Commercial vehicle and construction equipment finance |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 906.6 |  | 2,628.4
Before four years | 1,388.2 |  | 1,628.6
Before three years | 2,463.7 |  | 2,641.9
Before two years | 7,286.5 |  | 3,588.5
Before one years | 8,047.8 |  | 4,859.6
Current | 1,399.6 |  | 1,204.9
Revolving Loans | 6,878.0 |  | 5,011.7
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 28,370.4 |  | 21,563.6
Retail loans | Non-performing | Housing loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 25,341.0 |  | 22,222.3
Before four years | 6,041.4 |  | 6,506.8
Before three years | 6,946.4 |  | 5,569.9
Before two years | 7,306.7 |  | 4,869.8
Before one years | 3,952.9 |  | 3,804.6
Current | 573.5 |  | 739.3
Revolving Loans | 0.0 |  | 0.0
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 50,161.9 |  | 43,712.7
Retail loans | Non-performing | Other retail loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 5,904.0 |  | 3,885.2
Before four years | 1,256.1 |  | 1,892.0
Before three years | 1,776.7 |  | 2,161.5
Before two years | 5,873.5 |  | 2,405.6
Before one years | 28,568.9 |  | 4,053.3
Current | 3,940.3 |  | 3,129.2
Revolving Loans | 42,515.8 |  | 43,993.2
Revolving loans converted to term loans | 0.0 |  | 0.0
Total | 89,835.3 |  | 61,520.0
Wholesale loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 332,556.5 | 3,892.7 | 246,913.8
Before four years | 414,914.8 | 4,856.8 | 268,724.2
Before three years | 694,205.1 | 8,126.0 | 592,298.3
Before two years | 877,711.1 | 10,274.0 | 980,330.6
Before one years | 1,512,860.8 | 17,708.8 | 1,222,234.9
Current | 1,397,420.9 | 16,357.5 | 2,090,544.0
Revolving Loans | 1,877,576.5 | 21,978.0 | 1,801,593.5
Total | 7,107,245.7 | 83,193.8 | 7,202,639.3
Wholesale loans | Write off |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 10.9 | 0.1 | 2,585.0
Before four years | 2.1 | 0.0 | 264.3
Before three years | 0.0 | 0.0 | 0.0
Before two years | 0.0 | 0.0 | 0.0
Before one years | 708.0 | 8.3 | 481.5
Current | 0.0 | 0.0 | 0.0
Revolving Loans | 3,478.2 | 40.7 | 244.4
Total | 4,199.2 | $ 49.1 | 3,575.2
Wholesale loans | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 303,812.7 |  | 186,460.1
Before four years | 393,131.7 |  | 264,241.1
Before three years | 674,953.6 |  | 560,195.2
Before two years | 863,574.4 |  | 957,023.5
Before one years | 1,483,506.6 |  | 1,200,992.0
Current | 1,395,844.6 |  | 2,071,787.5
Revolving Loans | 1,841,034.8 |  | 1,773,221.5
Total | 6,955,858.4 |  | 7,013,920.9
Wholesale loans | Labelled |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 2,577.7 |  | 14,723.3
Before four years | 9,883.5 |  | 757.2
Before three years | 11,399.0 |  | 17,488.3
Before two years | 12,831.6 |  | 14,588.1
Before one years | 5,985.4 |  | 16,225.0
Current | 1,576.3 |  | 11,623.4
Revolving Loans | 12,808.6 |  | 6,485.4
Total | 57,062.1 |  | 81,890.7
Wholesale loans | Non-performing |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Prior | 26,166.1 |  | 45,730.4
Before four years | 11,899.6 |  | 3,725.9
Before three years | 7,852.5 |  | 14,614.8
Before two years | 1,305.1 |  | 8,719.0
Before one years | 23,368.8 |  | 5,017.9
Current | 0.0 |  | 7,133.1
Revolving Loans | 23,733.1 |  | 21,886.6
Total | ₨ 94,325.2 |  | ₨ 106,827.7

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