v3.26.1
Reconciliation of liabilities from financing activities (Detail) - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balance Beginning ₨ 43,290 ₨ 35,577 ₨ 25,431
Proceeds 25,421 28,413 23,800
Principal (25,164) (21,323) (10,826)
Interest (336) (299) 0
Movement in short term borrowings 4,504 244 (467)
Net Cash flow movement 47,715 42,612 37,938
Foreign exchange movement (2) (7) 24
Reclass (6,063) (642) (2,395)
Additions (Net of deletions) 516 1,027  
Interest 336 299  
Processing Charges / Fair value changes 4 1 10
Balance Ending 42,506 43,290 35,577
Borrowings      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balance Beginning 35,374 30,015 21,528
Proceeds 11,516 15,153 14,184
Principal (10,735) (9,390) (2,871)
Interest 0 0 0
Movement in short term borrowings 4,504 244 (467)
Net Cash flow movement 40,659 36,022 32,374
Foreign exchange movement (6) (8) 23
Reclass (6,063) (642) (2,395)
Additions (Net of deletions) 0 0  
Interest 0 0  
Processing Charges / Fair value changes 3 2 13
Balance Ending 34,593 35,374 30,015
Supplier Finance arrangements [Member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balance Beginning 4,106 2,519 1,452
Proceeds 13,905 13,260 8,622
Principal (14,000) (11,673) 7,555
Interest 0 0 0
Movement in short term borrowings 0 0 0
Net Cash flow movement 4,011 4,106 2,519
Foreign exchange movement 0 0 0
Reclass 0 0 0
Additions (Net of deletions) 0 0  
Interest 0 0  
Processing Charges / Fair value changes 0 0 0
Balance Ending 4,011 4,106 2,519
Lease liabilities [Member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balance Beginning 3,810 3,043 2,451
Proceeds 0 0 994
Principal (429) (260) (400)
Interest (336) (299) 0
Movement in short term borrowings 0 0 0
Net Cash flow movement 3,045 2,484 3,045
Foreign exchange movement 4 1 1
Reclass 0   0
Additions (Net of deletions) 516 1,027  
Interest 336 299  
Processing Charges / Fair value changes 1 (1) (3)
Balance Ending ₨ 3,902 ₨ 3,810 ₨ 3,043