Commitments and Contingencies - Additional Information (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | ||||
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Mar. 31, 2026
INR (₨)
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Mar. 31, 2026
USD ($)
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Mar. 31, 2025
INR (₨)
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Mar. 31, 2024
INR (₨)
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Mar. 31, 2026
USD ($)
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| Loss Contingencies [Line Items] | |||||
| Capital commitments, estimated amounts of contracts remaining to be executed on the capital account | ₨ 30,871.5 | ₨ 35,972.8 | |||
| Additional operating lease commitments with leases which have not yet commenced | 1,562.4 | $ 16.7 | |||
| Operating lease expense | ₨ 29,629.7 | $ 315.8 | 25,248.2 | ₨ 25,447.4 | |
| Minimum [Member] | |||||
| Loss Contingencies [Line Items] | |||||
| Additional operating lease commitments with leases which have not yet commenced, lease term | 1 year | 1 year | |||
| Maximum [Member] | |||||
| Loss Contingencies [Line Items] | |||||
| Additional operating lease commitments with leases which have not yet commenced, lease term | 18 years | 18 years | |||
| Indirect Taxes And Other Claims | |||||
| Loss Contingencies [Line Items] | |||||
| Contingencies, estimated possible loss | ₨ 61,162.2 | ₨ 60,331.1 | |||
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- Definition Lessee operating lease lease not yet commenced contract commitments. No definition available.
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- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of operating lease expense. Excludes sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity must commit resources to supply goods or services to one or more customers. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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