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Impairment losses (Details)
₨ / shares in Units, € in Millions, ₨ in Billions
12 Months Ended
Mar. 31, 2023
EUR (€)
Mar. 31, 2023
EUR (€)
₨ / shares
Mar. 31, 2022
EUR (€)
Mar. 31, 2021
EUR (€)
Mar. 31, 2023
INR (₨)
Impairment losses          
Impairment losses € 64   € 0    
Foreign exchange translation differences transferred to the income statement 111   (309) € (13)  
Vantage Towers [Member]          
Impairment losses          
Net gain on transaction € 8,607        
Goodwill.          
Impairment losses          
Management plans period (in years) 5 years        
Indus Towers          
Impairment losses          
Impairment losses € 64        
Share price | ₨ / shares   ₨ 143.00      
Recoverable amount 900 ₨ 900     ₨ 81
Other cash-generating units          
Impairment losses          
Impairment losses € 0   € 0 € 0