Investment in equity accounted investees (Details 2) ₨ in Millions, $ in Millions	12 Months Ended
Mar. 31, 2022 INR (₨)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 INR (₨)	Mar. 31, 2020 INR (₨)	Mar. 31, 2022 USD ($)
Investments accounted for using equity method [Line Items]
Carrying value of the Company's investment	₨ 4,318		₨ 3,375		$ 57
Company's share of profits for the year	703	$ 9	480	₨ 561
DRES energy private limited [Member]
Investments accounted for using equity method [Line Items]
Carrying value of the Company's investment	59		68	49
Company's share of profits for the year	₨ (9)		₨ 19	₨ (16)

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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