v3.25.2
Earnings / (loss) per share - Summary of Earning Per Share (Detail)
₨ / shares in Units, $ / shares in Units, ₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2025
INR (₨)
₨ / shares
shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2024
INR (₨)
₨ / shares
shares
Mar. 31, 2023
INR (₨)
₨ / shares
shares
Earnings per share [line items]        
Earnings/ (loss) attributable to equity holders of the parent ₨ 3,814 $ 45 ₨ 3,404 ₨ (4,817)
Earnings/ (loss) attributable to equity holders of Class A and C for basic and diluted earnings ₨ 3,959 $ 46 ₨ 3,634 ₨ (4,717)
Equity shares, Basic (in INR) | (per share) ₨ 10.92 $ 0.13 ₨ 9.94 ₨ (12.32)
Equity shares, Diluted (in INR) | (per share) ₨ 10.81 $ 0.13 ₨ 9.92 ₨ (12.32)
Weighted average number of equity shares in calculating basic EPS        
Weighted average number of equity shares in calculating basic EPS 362,670,142 362,670,142 365,506,172 382,531,025
Computation of Weighted average number of equity shares in calculating diluted EPS        
Impact of share options (dilutive) 3,455,768 3,455,768 875,605  
Weighted average number of equity shares in calculating diluted EPS 366,125,910 366,125,910 366,381,777 382,531,025
Class B Share        
Earnings per share [line items]        
Add: Loss attributable to one class share ₨ 70 $ 1 ₨ 117 ₨ 56
Class D Share        
Earnings per share [line items]        
Add: Loss attributable to one class share ₨ 75 $ 1 ₨ 113 ₨ 44
Class A Shares        
Earnings per share [line items]        
Equity shares, Basic (in INR) | (per share) ₨ 10.92 $ 0 ₨ 9.94 ₨ (12.32)
Equity shares, Diluted (in INR) | (per share) ₨ 10.81 $ 0 ₨ 9.92 ₨ (12.32)
Weighted average number of equity shares in calculating basic EPS        
Weighted average number of equity shares in calculating basic EPS 244,306,376 244,306,376 247,142,406 264,167,259
Class C Shares        
Earnings per share [line items]        
Equity shares, Basic (in INR) | (per share) ₨ 10.92 $ 0 ₨ 9.94 ₨ (12.32)
Equity shares, Diluted (in INR) | (per share) ₨ 10.81 $ 0 ₨ 9.92 ₨ (12.32)
Weighted average number of equity shares in calculating basic EPS        
Weighted average number of equity shares in calculating basic EPS 118,363,766 118,363,766 118,363,766 118,363,766