Income Taxes - Summary of Reconciliation of Income Tax Provision to Amount Computed by Applying Statutory Income Tax Rate to Income Before Income Taxes (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] | |||
| Profit before income taxes | $ 4,506 | $ 4,447 | $ 4,346 |
| Enacted tax rates in India | 25.17% | 25.17% | 34.94% |
| Computed expected tax expense | $ 1,137 | $ 1,119 | $ 1,519 |
| Tax effect due to non-taxable income for Indian tax purposes | (363) | ||
| Overseas taxes | 126 | 131 | 136 |
| Tax provision (reversals) | (93) | 16 | (113) |
| Effect of differential tax rates | (8) | (9) | (69) |
| Effect of exempt non-operating income | (1) | (4) | (6) |
| Effect of unrecognized deferred tax assets | 11 | 19 | 25 |
| Effect of non-deductible expenses | 38 | 33 | 20 |
| Others | (20) | (20) | 28 |
| Income tax expense | $ 1,190 | $ 1,285 | $ 1,177 |
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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Current tax effect of foreign tax rates. No definition available.
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- Definition Tax effect of exempt non-operating income. No definition available.
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- Definition Tax effect of unrecognized deferred tax assets. No definition available.
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- Definition Tax effects for reconciliation tax provision and reversals. No definition available.
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