v3.26.1
Financial Instruments - Summary of Remaining Contractual Maturities of Financial Liabilities at Reporting Date (Detail) - INR (₨)
₨ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of maturity analysis for significant financial liabilities [line items]    
Loans, borrowings and bank overdrafts [1] ₨ 167,874 ₨ 161,817
Lease Liabilities [1] 35,036 30,218
Trade payables and accrued expenses 99,318 88,252
Derivative liabilities 10,978 968
Contingent consideration [2] 1,634 1,864
Liability on written put options to non-controlling interests [2] 5,699 4,945
Rent Deposit 489 501
Liabilities Towards Customer Contracts 1,440 1,368
Advance from Customers 329 167
Capital Creditors 689 1,255
Others 7,820 1,571
Total financial liabilities 331,306 292,926
Loans, borrowings and bank overdrafts, cash flows 169,724 164,460 [1]
Lease Liabilities Cash Flows 41,814 36,318 [1]
Trade payables and accrued expenses, cash flows 99,318 88,252
Derivative liabilities, cash flows 10,978 968
Contingent consideration, cash flows 2,020 2,401 [2]
Liability on written put options to non-controlling interests, cash flows 6,064 6,505 [2]
Rent deposit cash flows 489 501
Liabilities towards customer contracts, cash flows 1,440 1,368
Advance from customers cash flows 329 167
Capital creditors, cash flows 689 1,255
Others, cash flows 7,820 1,580
Cash flows under financial liabilities 340,685 303,775
Interest on Loans, borrowings and bank overdrafts [1] (1,850) (2,643)
Interest on Lease Liabilities [1] (6,778) (6,100)
Interest expense on Trade payables and accrued expenses 0 0
Interest expense on Derivative liabilities 0 0
Interest on contingent consideration [2] (386) (537)
Interest expense of liability on written put options to non-controlling interests [2] (365) (1,560)
Interest on rent deposit 0 0
Interest expense of liabilities towards customer contracts 0 0
Interest on advance from customers 0 0
Interest expense on capital creditors 0 0
Interest expense on others, cash flows 0 (9)
Interest included in cash flows under financial liabilities (9,379) (10,849)
Less than 1 year [member]    
Disclosure of maturity analysis for significant financial liabilities [line items]    
Loans, borrowings and bank overdrafts, cash flows [1] 167,648 99,884
Lease Liabilities Cash Flows [1] 10,492 9,563
Trade payables and accrued expenses, cash flows 94,924 88,252
Derivative liabilities, cash flows 10,978 968
Contingent consideration, cash flows [2] 467 580
Liability on written put options to non-controlling interests, cash flows [2] 2,689 0
Rent deposit cash flows 477 475
Liabilities towards customer contracts, cash flows 721 342
Advance from customers cash flows 329 167
Capital creditors, cash flows 689 1,255
Others, cash flows 6,057 1,082
Cash flows under financial liabilities 295,471 202,568
1-2 years [member]    
Disclosure of maturity analysis for significant financial liabilities [line items]    
Loans, borrowings and bank overdrafts, cash flows 2,076 64,576 [1]
Lease Liabilities Cash Flows 8,315 6,950 [1]
Trade payables and accrued expenses, cash flows 1,929 0
Derivative liabilities, cash flows 0 0
Contingent consideration, cash flows 1,553 420 [2]
Liability on written put options to non-controlling interests, cash flows [2] 0 2,686
Rent deposit cash flows 12 4
Liabilities towards customer contracts, cash flows 359 342
Advance from customers cash flows 0 0
Capital creditors, cash flows 0 0
Others, cash flows 297 303
Cash flows under financial liabilities 14,541 75,281
2-4 years [member]    
Disclosure of maturity analysis for significant financial liabilities [line items]    
Loans, borrowings and bank overdrafts, cash flows [1] 0 0
Lease Liabilities Cash Flows [1] 10,152 8,426
Trade payables and accrued expenses, cash flows 1,920 0
Derivative liabilities, cash flows 0 0
Contingent consideration, cash flows [2] 0 1,401
Liability on written put options to non-controlling interests, cash flows [2] 3,375 3,819
Rent deposit cash flows 0 22
Liabilities towards customer contracts, cash flows 360 684
Advance from customers cash flows 0 0
Capital creditors, cash flows 0 0
Others, cash flows 439 195
Cash flows under financial liabilities 16,246 14,547
Beyond 4 years [member]    
Disclosure of maturity analysis for significant financial liabilities [line items]    
Loans, borrowings and bank overdrafts, cash flows [1] 0 0
Lease Liabilities Cash Flows [1] 12,855 11,379
Trade payables and accrued expenses, cash flows 545 0
Derivative liabilities, cash flows 0 0
Contingent consideration, cash flows [2] 0 0
Liability on written put options to non-controlling interests, cash flows [2] 0 0
Rent deposit cash flows 0 0
Liabilities towards customer contracts, cash flows 0 0
Advance from customers cash flows 0 0
Capital creditors, cash flows 0 0
Others, cash flows 1,027 0
Cash flows under financial liabilities ₨ 14,427 ₨ 11,379
[1] Includes future cash outflow towards estimated interest on loans, borrowings and bank overdrafts, and lease liabilities.
[2] Includes future cash outflow towards estimated interest on contingent consideration and liability on written put options to non-controlling interests.