v3.26.1
Impairment losses (Details)
₨ / shares in Units, € in Millions, ₨ in Billions
12 Months Ended
Mar. 31, 2026
EUR (€)
Mar. 31, 2025
EUR (€)
Mar. 31, 2024
EUR (€)
Mar. 31, 2024
EUR (€)
₨ / shares
Mar. 31, 2024
INR (₨)
Goodwill [member]          
Impairment losses          
Management plans period (in years) 5 years        
Indus Towers          
Impairment losses          
Impairment losses     € 64    
Share price | ₨ / shares       ₨ 291.15  
Recoverable amount     1,800 ₨ 1,800 ₨ 165
Cash-generating units within continuing operations          
Impairment losses          
Impairment losses € 0        
Germany, cash-generating unit [Member]          
Impairment losses          
Impairment losses   € 4,400      
Amount by which unit's recoverable amount exceeds its carrying amount 300   2,300 2,300  
Germany, cash-generating unit [Member] | Value in use [member]          
Impairment losses          
Carrying values of impairment reduced value in use estimates   30,900      
Romania Cash Generating Unit [Member]          
Impairment losses          
Impairment losses   200      
Romania Cash Generating Unit [Member] | Value in use [member]          
Impairment losses          
Carrying values of impairment reduced value in use estimates   600      
UK          
Impairment losses          
Amount by which unit's recoverable amount exceeds its carrying amount € 2,200 € 1,000 € 1,600 ₨ 1,600