CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - INR (₨) ₨ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Statement of changes in equity [abstract]
Tax on changes in fair value of equity and debt instruments	₨ 293	₨ 293
Tax effect on effective portion of change in fair value of cash flow hedges	288	319	₨ 232
Tax effect on actuarial gain on post-employment benefit obligations	₨ 12	73	₨ (22)
Reversal from special economic zone reinvestment reserve		₨ 127

The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph ab
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_ab&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 90
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_90&doctype=Standard
-URIDate 2021-03-24

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]]

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Income tax relating to investments in equity instruments and financial assets measured at fair value through other comprehensive income included in other comprehensive income.

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- Definition

Reversal from special economic zone reinvestment reserve.

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