v3.25.2
Group information - Summary of Joint Operations and Joint Ventures (Detail)
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
VG DTL Transmissions Projects Private Limited    
Disclosure of joint operations [line items]    
Name of companies VG DTL Transmissions Projects Private Limited  
Investor company ReNew Wind Energy (AP2) PrivateLimited  
Country of incorporation India  
Proportion of ownership interest in joint operation 50.00% 50.00%
3E NV    
Disclosure of joint operations [line items]    
Name of companies 3E NV (including its subsidiaries)  
Investor company ReNew Power International Limited  
Country of incorporation Belgium  
Proportion of ownership interest in joint operation 78.00% 40.00%
Fluence India ReNew JV Private Limited    
Disclosure of joint operations [line items]    
Name of companies Fluence India ReNew JV Private Limited  
Investor company ReNew Private Limited  
Country of incorporation India  
Proportion of ownership interest in joint operation 50.00% 50.00%
GH4 India Private Limited    
Disclosure of joint operations [line items]    
Name of companies GH4 India Private Limited  
Investor company ReNew Private Limited  
Country of incorporation India  
Proportion of ownership interest in joint operation 33.00% 33.00%
Climate Connect Digital Limited (refer Note 36)    
Disclosure of joint operations [line items]    
Name of companies Climate Connect Digital Limited (refer Note 36(i)(c))  
Investor company ReNew Power International Limited  
Country of incorporation United Kingdom  
Proportion of ownership interest in joint operation 25.00%