v3.26.1
Loans - Summary of Gross Loans Origination and Internally Assigned Credit Risk Ratings (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Retail loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior ₨ 1,790,891.8 $ 19,086.6 ₨ 1,660,541.8
Before four years 1,016,809.5 10,836.7 738,109.8
Before three years 1,736,189.6 18,503.6 1,436,058.8
Before two years 2,971,715.0 31,671.3 2,547,190.8
Before one years 3,800,544.1 40,504.6 4,152,270.9
Current 5,760,285.6 61,390.6 5,338,591.4
Revolving Loans 6,026,607.8 64,228.9 5,231,263.8
Revolving loans converted to term loans 478,399.8 5,098.6 427,538.1
Total 23,581,443.2 251,320.9 21,531,565.4
Retail loans | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 13,114.5 139.8 13,553.2
Before four years 6,675.9 71.1 5,125.7
Before three years 19,405.3 206.8 11,729.4
Before two years 34,049.4 362.9 29,815.6
Before one years 29,634.4 315.8 30,013.6
Current 2,785.0 29.7 8,099.5
Revolving Loans 32,972.8 351.4 30,051.8
Revolving loans converted to term loans 18,704.3 199.3 16,801.6
Total 157,341.6 1,676.8 145,190.4
Retail loans | Auto loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 19,409.1   17,996.6
Before four years 48,119.3   39,541.4
Before three years 149,032.6   111,933.8
Before two years 267,267.7   265,204.1
Before one years 463,051.4   406,692.1
Current 643,777.6   612,616.8
Revolving Loans 95,047.6   96,922.6
Revolving loans converted to term loans 0.0   0.0
Total 1,685,705.3   1,550,907.4
Retail loans | Auto loans | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,222.2   1,490.5
Before four years 1,188.9   1,103.9
Before three years 2,467.6   1,768.9
Before two years 3,209.3   2,771.3
Before one years 2,754.5   2,057.7
Current 181.8   394.4
Revolving Loans 0.0   0.0
Revolving loans converted to term loans 0.0   0.0
Total 11,024.3   9,586.7
Retail loans | Personal loans/Credit card      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 2,637.5   7,225.9
Before four years 30,341.0   20,096.4
Before three years 135,067.2   102,481.1
Before two years 296,772.3   325,240.5
Before one years 628,840.1   629,413.2
Current 1,394,076.1   1,241,263.4
Revolving Loans 659,684.2   672,934.7
Revolving loans converted to term loans 478,399.8   427,538.1
Total 3,625,818.2   3,426,193.3
Retail loans | Personal loans/Credit card | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,189.3   2,263.9
Before four years 2,672.9   1,559.0
Before three years 9,377.4   5,988.1
Before two years 18,081.7   18,451.4
Before one years 19,133.7   21,504.4
Current 2,075.4   4,065.9
Revolving Loans 25,516.4   25,111.9
Revolving loans converted to term loans 18,704.3   16,801.6
Total 96,751.1   95,746.2
Retail loans | Retail business banking      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 89,681.7   90,286.8
Before four years 141,978.1   62,968.2
Before three years 303,775.1   208,322.2
Before two years 497,315.7   406,185.5
Before one years 663,516.3   629,013.4
Current 916,360.6   770,115.0
Revolving Loans 3,324,457.0   2,800,798.9
Revolving loans converted to term loans 0.0   0.0
Total 5,937,084.5   4,967,690.0
Retail loans | Retail business banking | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,174.1   1,382.6
Before four years 317.4   176.1
Before three years 419.8   270.1
Before two years 180.3   39.7
Before one years 8.2   44.5
Current 0.8   125.9
Revolving Loans 100.4   22.1
Revolving loans converted to term loans 0.0   0.0
Total 2,201.0   2,061.0
Retail loans | Commercial vehicle and construction equipment finance      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 6,969.0   10,522.3
Before four years 17,695.1   8,530.3
Before three years 110,307.1   64,391.4
Before two years 302,616.2   270,486.3
Before one years 527,032.2   516,036.3
Current 781,994.6   741,055.6
Revolving Loans 308,151.2   251,171.4
Revolving loans converted to term loans 0.0   0.0
Total 2,054,765.4   1,862,193.6
Retail loans | Commercial vehicle and construction equipment finance | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 569.4   1,242.2
Before four years 1,205.0   853.3
Before three years 4,972.8   2,499.5
Before two years 7,762.4   4,319.4
Before one years 3,347.3   2,794.0
Current 197.1   2,555.9
Revolving Loans 0.0   6.0
Revolving loans converted to term loans 0.0   0.0
Total 18,054.0   14,270.3
Retail loans | Housing loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,654,697.5   1,513,385.3
Before four years 761,897.7   596,492.3
Before three years 996,721.5   917,561.9
Before two years 1,466,538.6   1,189,865.8
Before one years 1,252,301.3   1,630,476.8
Current 1,332,842.8   1,293,396.9
Revolving Loans 0.0   0.0
Revolving loans converted to term loans 0.0   0.0
Total 7,464,999.4   7,141,179.0
Retail loans | Housing loans | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 5,235.8   3,091.7
Before four years 364.9   477.1
Before three years 161.5   79.8
Before two years 34.3   5.1
Before one years 12.4   23.0
Current 0.4   0.0
Revolving Loans 2.0   0.0
Revolving loans converted to term loans 0.0   0.0
Total 5,811.3   3,676.7
Retail loans | Other retail loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 17,497.0   21,124.9
Before four years 16,778.3   10,481.2
Before three years 41,286.1   31,368.4
Before two years 141,204.5   90,208.6
Before one years 265,802.8   340,639.1
Current 691,233.9   680,143.7
Revolving Loans 1,639,267.8   1,409,436.2
Revolving loans converted to term loans 0.0   0.0
Total 2,813,070.4   2,583,402.1
Retail loans | Other retail loans | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 3,723.7   4,082.3
Before four years 926.8   956.3
Before three years 2,006.2   1,123.0
Before two years 4,781.4   4,228.7
Before one years 4,378.3   3,590.0
Current 329.5   957.4
Revolving Loans 7,354.0   4,911.8
Revolving loans converted to term loans 0.0   0.0
Total 23,499.9   19,849.5
Retail loans | Performing | Auto loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 16,535.8   16,872.3
Before four years 46,935.6   38,368.9
Before three years 146,246.0   109,709.7
Before two years 263,176.0   261,060.2
Before one years 458,666.2   403,060.5
Current 642,906.1   611,564.6
Revolving Loans 94,376.8   93,911.1
Revolving loans converted to term loans 0.0   0.0
Total 1,668,842.5   1,534,547.3
Retail loans | Performing | Personal loans/Credit card      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 2,280.5   6,682.8
Before four years 29,663.0   19,129.5
Before three years 132,630.1   100,673.9
Before two years 293,206.7   320,434.6
Before one years 624,760.2   623,756.2
Current 1,392,446.3   1,238,873.6
Revolving Loans 648,971.2   661,166.9
Revolving loans converted to term loans 477,898.0   426,548.1
Total 3,601,856.0   3,397,265.6
Retail loans | Performing | Retail business banking      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 83,414.1   84,507.8
Before four years 138,520.8   59,255.0
Before three years 299,789.7   204,872.5
Before two years 493,490.9   402,892.1
Before one years 660,532.9   627,467.3
Current 915,935.4   769,923.2
Revolving Loans 3,260,460.5   2,750,841.8
Revolving loans converted to term loans 0.0   0.0
Total 5,852,144.3   4,899,759.7
Retail loans | Performing | Commercial vehicle and construction equipment finance      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 5,731.7   9,615.7
Before four years 16,729.7   7,142.1
Before three years 105,794.0   61,927.7
Before two years 293,435.4   263,199.8
Before one years 519,939.1   507,988.5
Current 780,908.6   739,656.0
Revolving Loans 301,789.3   244,293.4
Revolving loans converted to term loans 0.0   0.0
Total 2,024,327.8   1,833,823.2
Retail loans | Performing | Housing loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,631,633.0   1,488,044.3
Before four years 755,549.5   590,450.9
Before three years 988,830.2   910,615.5
Before two years 1,460,784.5   1,182,559.1
Before one years 1,249,556.3   1,626,523.9
Current 1,332,450.2   1,292,823.4
Revolving Loans 0.0   0.0
Revolving loans converted to term loans 0.0   0.0
Total 7,418,803.7   7,091,017.1
Retail loans | Performing | Other retail loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 14,195.7   15,220.9
Before four years 15,845.5   9,225.1
Before three years 36,629.1   29,591.7
Before two years 103,370.2   84,335.1
Before one years 255,674.0   312,070.2
Current 690,107.1   676,203.4
Revolving Loans 1,591,744.9   1,366,920.4
Revolving loans converted to term loans 0.0   0.0
Total 2,707,566.5   2,493,566.8
Retail loans | Non-performing | Auto loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 2,873.3   1,124.3
Before four years 1,183.7   1,172.5
Before three years 2,786.6   2,224.1
Before two years 4,091.7   4,143.9
Before one years 4,385.2   3,631.6
Current 871.5   1,052.2
Revolving Loans 670.8   3,011.5
Revolving loans converted to term loans 0.0   0.0
Total 16,862.8   16,360.1
Retail loans | Non-performing | Personal loans/Credit card      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 357.0   543.1
Before four years 678.0   966.9
Before three years 2,437.1   1,807.2
Before two years 3,565.6   4,805.9
Before one years 4,079.9   5,657.0
Current 1,629.8   2,389.8
Revolving Loans 10,713.0   11,767.8
Revolving loans converted to term loans 501.8   990.0
Total 23,962.2   28,927.7
Retail loans | Non-performing | Retail business banking      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 6,267.6   5,779.0
Before four years 3,457.3   3,713.2
Before three years 3,985.4   3,449.7
Before two years 3,824.8   3,293.4
Before one years 2,983.4   1,546.1
Current 425.2   191.8
Revolving Loans 63,996.5   49,957.1
Revolving loans converted to term loans 0.0   0.0
Total 84,940.2   67,930.3
Retail loans | Non-performing | Commercial vehicle and construction equipment finance      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 1,237.3   906.6
Before four years 965.4   1,388.2
Before three years 4,513.1   2,463.7
Before two years 9,180.8   7,286.5
Before one years 7,093.1   8,047.8
Current 1,086.0   1,399.6
Revolving Loans 6,361.9   6,878.0
Revolving loans converted to term loans 0.0   0.0
Total 30,437.6   28,370.4
Retail loans | Non-performing | Housing loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 23,064.5   25,341.0
Before four years 6,348.2   6,041.4
Before three years 7,891.3   6,946.4
Before two years 5,754.1   7,306.7
Before one years 2,745.0   3,952.9
Current 392.6   573.5
Revolving Loans 0.0   0.0
Revolving loans converted to term loans 0.0   0.0
Total 46,195.7   50,161.9
Retail loans | Non-performing | Other retail loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 3,301.3   5,904.0
Before four years 932.8   1,256.1
Before three years 4,657.0   1,776.7
Before two years 37,834.3   5,873.5
Before one years 10,128.8   28,568.9
Current 1,126.8   3,940.3
Revolving Loans 47,522.9   42,515.8
Revolving loans converted to term loans 0.0   0.0
Total 105,503.9   89,835.3
Wholesale loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 527,414.8 5,621.0 332,556.5
Before four years 418,517.4 4,460.4 414,914.8
Before three years 538,907.7 5,743.4 694,205.1
Before two years 1,089,976.8 11,616.5 877,711.1
Before one years 955,221.2 10,180.3 1,512,860.8
Current 1,881,494.8 20,052.2 1,397,420.9
Revolving Loans 2,595,219.5 27,658.8 1,877,576.5
Total 8,006,752.2 85,332.6 7,107,245.7
Wholesale loans | Write off      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 0.0 0.0 10.9
Before four years 0.0 0.0 2.1
Before three years 0.0 0.0 0.0
Before two years 0.0 0.0 0.0
Before one years 26.0 0.3 708.0
Current 0.0 0.0 0.0
Revolving Loans 121.8 1.3 3,478.2
Total 147.8 $ 1.6 4,199.2
Wholesale loans | Pass      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 494,819.8   303,812.7
Before four years 405,619.9   393,131.7
Before three years 525,289.7   674,953.6
Before two years 1,086,127.5   863,574.4
Before one years 954,899.5   1,483,506.6
Current 1,875,563.9   1,395,844.6
Revolving Loans 2,554,618.6   1,841,034.8
Total 7,896,938.9   6,955,858.4
Wholesale loans | Labelled      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 7,139.8   2,577.7
Before four years 5,055.2   9,883.5
Before three years 11,476.4   11,399.0
Before two years 3,103.9   12,831.6
Before one years 208.1   5,985.4
Current 5,922.9   1,576.3
Revolving Loans 16,092.6   12,808.6
Total 48,998.9   57,062.1
Wholesale loans | Non-performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Prior 25,455.2   26,166.1
Before four years 7,842.3   11,899.6
Before three years 2,141.6   7,852.5
Before two years 745.4   1,305.1
Before one years 113.6   23,368.8
Current 8.0   0.0
Revolving Loans 24,508.3   23,733.1
Total ₨ 60,814.4   ₨ 94,325.2