Discontinued operations and assets held for sale - Discontinued operations (Details) - EUR (€) € in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Non-current assets
Investments in associates and joint ventures	€ 4,268	€ 4,670
Total assets held for sale	€ 959	€ 1,257
Indus Towers
Assets held for sale
Proportion of ownership interest in joint venture	21.00%	28.10%
Non current assets held for sale
Non-current assets
Investments in associates and joint ventures	€ 959	€ 1,257
Total assets held for sale	€ 959	€ 1,257

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]]

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