v3.25.2
Disposal group held for sale and disposal of subsidiaries - Schedule of Results of Disposal of Subsidiary Included in Consolidated Statement of Profit or Loss (Detail)
₨ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
INR (₨)
Mar. 31, 2023
USD ($)
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]            
Income ₨ 97,063 $ 1,136 ₨ 81,319   ₨ 78,223  
Expenses (99,014) (1,159) (88,234)   (91,872)  
Profit / (loss) before tax 10,034 $ 117 8,142   (2,470)  
ReNew Sun Waves Private Limited            
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]            
Income 1,899   1,717      
Expenses (1,567)   (1,461)      
Profit / (loss) before tax 332   256      
Income tax expense (99)   (66)      
(Loss)/ profit after tax 233   190      
Climate Connect Digital Limited            
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]            
Income 0   16      
Expenses (15)   (51)      
Profit / (loss) before tax (15)   (36)      
Income tax expense     (36)      
(Loss)/ profit after tax ₨ (15)          
Renew Solar Urja Private Limited            
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]            
Income     1,816   2,255  
Expenses     (1,577)   (1,698)  
Profit / (loss) before tax     239   557  
Income tax expense     (74)   (357)  
(Loss)/ profit after tax     ₨ 165   ₨ 200  
Vivasvat Solar Energy Private Limited, Izra Solar Energy Private Limited, Abha Sunlight Private Limited, Nokor Bhoomi Private Limited and Nokor Solar Energy Private Limited            
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]            
Income | $       $ 380   $ 722
Expenses | $       (1,061)   (543)
Profit / (loss) before tax | $       (682)   179
Income tax expense | $       174   (30)
(Loss)/ profit after tax | $       $ (508)   $ 149