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Deferred tax assets and liabilities (Details 4) - INR (₨) ₨ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Disclosure Of Deferred tax assets and liabilities [Abstract]
Profit/(Loss) before income taxes	₨ (286,412)	₨ 352,039	₨ 1,021,021
Enacted tax rates in India	25.17%	25.17%	25.17%
Computed expected tax expense / (benefit)	₨ (72,090)	₨ 88,608	₨ 256,991
Effect of:
Recognition of previously unrecognised deferred tax asset on temporary differences	0	(1,735)	(42,500)
Difference on account differential tax rates in different jurisdictions	49,300	(22,852)	18,519
Effect of Unrecognised business loss including reversal of previously recognised DTA on business loss	382,637	157,100	105,500
Effect of expenses that are not deductible in determining taxable profit	32,500	26,963	1,700
Utilisation of previously unrecognised temporary differences	57,600	0	0
Permanent difference on account of coupon charges on CCDs	0	(30,205)	43
Others	48,599	(34,779)	6,246
Tax expense (income), continuing operations	₨ 498,546	₨ 183,100	₨ 346,499

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
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-URIDate 2024-03-27

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- Definition

The amount of deferred tax expense arising from the write-down, or reversal of a previous write-down, of a deferred tax asset. [Refer: Deferred tax assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 80
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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]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
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-Paragraph 81
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-URIDate 2024-03-27

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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 changes in the tax rate. [Refer: Accounting profit]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Income Tax Expenses Derived From Continuing Operations.

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- Definition

Permanent difference on account of coupon charges on CCDs.

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- Definition

Profit before income taxes.

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- Definition

Tax effect of expenses that are not deductible in determining taxable profit.

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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 unrecognized deferred tax asset on temporary differences.

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The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate]

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- Definition

Utilisation of previously unrecognised temporary differences.

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