Income Taxes - Reconciliation of Income Taxes at Indian Statutory Income Tax Rate to Income Tax Expense as Reported (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
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Mar. 31, 2026
INR (₨)
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Mar. 31, 2026
USD ($)
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Mar. 31, 2025
INR (₨)
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Mar. 31, 2024
INR (₨)
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| Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items] | ||||
| Income before income tax expense | ₨ 939,027.9 | $ 10,007.6 | ₨ 861,546.2 | ₨ 705,459.0 |
| Expected income tax expense | ₨ 236,334.5 | $ 2,518.8 | ₨ 216,833.8 | ₨ 177,549.9 |
| Expected income tax expense percent | 25.17% | 25.17% | 25.17% | 25.17% |
| Tax Jurisdiction of Domicile [Extensible Enumeration] | Foreign Tax Jurisdiction [Member] | Foreign Tax Jurisdiction [Member] | Foreign Tax Jurisdiction [Member] | Foreign Tax Jurisdiction [Member] |
| Adjustments to reconcile expected income tax to actual tax expense | ||||
| Foreign tax effects | ₨ (639.2) | $ (6.8) | ₨ (51.2) | ₨ (77.3) |
| Foreign tax effects percent | (0.07%) | (0.07%) | (0.01%) | (0.01%) |
| Cross border tax laws | ₨ 1,676.9 | $ 17.9 | ₨ 165.3 | ₨ 104.1 |
| Cross border tax laws percent | 0.18% | 0.18% | 0.02% | 0.01% |
| Tax credit | ₨ (1,037.7) | $ (11.1) | ₨ (114.1) | ₨ (26.8) |
| Tax credit percent | (0.11%) | (0.11%) | (0.01%) | 0.00% |
| Interest on income tax refund, net of income tax effect | ₨ (7,322.5) | $ (78.0) | ₨ (6,452.8) | ₨ (4,125.0) |
| Interest on income tax refund, net of income tax effect percent | (0.78%) | (0.78%) | (0.75%) | (0.58%) |
| Deficiencies/ (excess deductions) on Stock-based compensation | ₨ (1,931.5) | $ (20.6) | ₨ 1,427.1 | ₨ (10,645.6) |
| Deficiencies/ (excess deductions) on Stock-based compensation percent | (0.21%) | (0.21%) | 0.17% | (1.51%) |
| Income subject to rates other than the statutory income tax rate | ₨ (4,503.5) | $ (48.0) | ₨ (910.8) | ₨ (1,262.0) |
| Income subject to rates other than the statutory income tax rate percent | (0.48%) | (0.48%) | (0.11%) | (0.18%) |
| Changes in tax laws or rates enacted in the current period | ₨ 0.0 | $ 0.0 | ₨ (11,503.2) | ₨ 0.0 |
| Changes in tax laws or rates enacted in the current period percent | 0.00% | 0.00% | (1.34%) | 0.00% |
| Special reserve deduction | ₨ (7,550.4) | $ (80.5) | ₨ (8,053.7) | ₨ (5,143.2) |
| Special reserve deduction percent | (0.80%) | (0.80%) | (0.93%) | (0.73%) |
| Changes in unrecognized tax benefits of earlier years | ₨ (726.1) | $ (7.7) | ₨ (16,515.6) | ₨ (80,874.4) |
| Changes in unrecognized tax benefits of earlier years percent | (0.08%) | (0.08%) | (1.92%) | (11.46%) |
| Other, net | ₨ (2,369.0) | $ (25.3) | ₨ 190.1 | ₨ 2,327.4 |
| Other, net percent | (0.25%) | (0.25%) | 0.02% | 0.32% |
| Income tax expense | ₨ 211,931.5 | $ 2,258.7 | ₨ 175,014.9 | ₨ 77,827.1 |
| Income tax expense percent | 22.57% | 22.57% | 20.31% | 11.03% |
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- Definition Effective income tax rate reconciliation at interest on ncome tax refund rate. No definition available.
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- Definition Effective income tax rate reconciliation at share based compensation rate. No definition available.
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- Definition Effective income tax rate reconciliation at special reserve deduction rate. No definition available.
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- Definition Effective income tax rate reconciliation at unrecognized tax benefit of earlier years including consequential tax credit pursuant to favourable orders rate. No definition available.
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- Definition Effective income tax reconciliation transfer to special reserve amount. No definition available.
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- Definition Effective income tax reconciliation unrecognized tax benefit of earlier years reversed including consequential tax credit as per favorable orders. No definition available.
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- Definition Interest On Income Tax Refund net of tax. No definition available.
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- Definition Reconciliation of Estimated Income Taxes to Income Tax Expense as Reported [Line Items] No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of reported income tax expense (benefit) from difference to expected income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to cross-border tax law. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of reported income tax expense (benefit) from difference to expected income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to cross-border tax law. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Indicates tax jurisdiction of domicile. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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