v3.26.1
Borrowings (Details 3) - INR (₨)
₨ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure Of Borrowings [Line Items]    
Borrowings ₨ 42,506 ₨ 43,290
Working capital facility [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount ₨ 5,990  
Security Primarily secured by way of pari-passu charge on the entire current assets of the Group and collaterally by way of pari-passu charge on the unencumbered movable fixed assets of the Group with other banks under consortium.  
Working capital facility [Member] | WCDL 1 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount ₨ 2,440  
Working capital facility [Member] | WCDL 2 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 1,450  
Working capital facility [Member] | WCDL 3 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 530  
Working capital facility [Member] | WCDL 4 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 400  
Working capital facility [Member] | WCDL 5 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 400  
Working capital facility [Member] | WCDL 6 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 250  
Working capital facility [Member] | WCDL 7 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 450  
Working capital facility [Member] | WCDL 8 [Member]    
Disclosure Of Borrowings [Line Items]    
Borowing notional amount 70  
WCDL [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 4,649 3,050
WCDL [Member] | WCDL 1 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 2,380 930
WCDL [Member] | WCDL 2 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 730 640
WCDL [Member] | WCDL 3 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 490 360
WCDL [Member] | WCDL 4 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 400 400
WCDL [Member] | WCDL 5 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 400 300
WCDL [Member] | WCDL 6 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 249 0
WCDL [Member] | WCDL 7 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 350
WCDL [Member] | WCDL 8 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 70
Bank overdrafts [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 326
Bank overdrafts [Member] | WCDL 1 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 296
Bank overdrafts [Member] | WCDL 2 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 0
Bank overdrafts [Member] | WCDL 3 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 27
Bank overdrafts [Member] | WCDL 4 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 0
Bank overdrafts [Member] | WCDL 5 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 0
Bank overdrafts [Member] | WCDL 6 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 3
Bank overdrafts [Member] | WCDL 7 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings 0 0
Bank overdrafts [Member] | WCDL 8 [Member]    
Disclosure Of Borrowings [Line Items]    
Borrowings ₨ 0 ₨ 0