| (Rs. in Millions) | 
| Particulars | Mar 2025 | Mar 2024 | Mar 2023 | Mar 2022 | Mar 2021 | 
| EQUITY AND LIABILITIES | 0 | 0 | 0 | 0 | 0 | 
| Share Capital | 7918.48 | 7918.46 | 7916.07 | 7908.13 | 7904.21 | 
| Equity - Authorised | 10073.90 | 10073.90 | 10014.40 | 10014.40 | 10014.40 | 
| Equity - Issued | 7918.48 | 7918.46 | 7916.07 | 7908.13 | 7904.21 | 
| Equity Paid Up | 7918.48 | 7918.46 | 7916.07 | 7908.13 | 7904.21 | 
| Equity Shares Forfeited | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Adjustments to Equity | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Preference Capital Paid Up | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Face Value | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 
| Share Warrants & Outstandings | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Total Reserves | 4653.02 | 3647.54 | 2676.33 | 1972.57 | 2128.18 | 
| Securities Premium | 1057.08 | 1057.06 | 1054.32 | 1045.19 | 1040.68 | 
| Capital Reserves | -31.91 | -31.91 | -31.91 | 0.00 | 0.00 | 
| Profit & Loss Account Balance | 3317.68 | 2312.81 | 1343.46 | 618.29 | 778.87 | 
| General Reserves | 303.52 | 303.52 | 303.52 | 303.52 | 303.52 | 
| Other Reserves | 6.64 | 6.06 | 6.94 | 5.57 | 5.11 | 
| Reserve excluding Revaluation Reserve | 4653.02 | 3647.54 | 2676.33 | 1972.57 | 2128.18 | 
| Revaluation reserve | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Shareholder's Funds | 12571.49 | 11565.99 | 10592.40 | 9880.70 | 10032.39 | 
| Minority Interest | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Long-Term Borrowings | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Secured Loans | 1557.63 | 2264.47 | 2977.82 | 3009.42 | 3233.15 | 
| Non Convertible Debentures | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Converible Debentures & Bonds | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Packing Credit - Bank | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Inter Corporate & Security Deposit | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Term Loans - Banks | 1340.16 | 1922.63 | 2434.75 | 2971.28 | 3041.62 | 
| Term Loans - Institutions | 909.21 | 1042.72 | 1068.36 | 421.26 | 518.68 | 
| Other Secured | -691.74 | -700.88 | -525.29 | -383.12 | -327.15 | 
| Unsecured Loans | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Fixed Deposits - Public | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Loans and advances from subsidiaries | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Inter Corporate Deposits (Unsecured) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Foreign Currency Convertible Notes | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Long Term Loan in Foreign Currency | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Loans - Banks | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Loans - Govt. | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Loans - Others | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Unsecured Loan | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Deferred Tax Assets / Liabilities | -56.21 | -224.84 | -377.57 | -503.77 | -438.46 | 
| Deferred Tax Assets | 517.95 | 673.30 | 817.10 | 922.87 | 837.91 | 
| Deferred Tax Liability | 461.75 | 448.46 | 439.53 | 419.10 | 399.45 | 
| Other Long Term Liabilities | 1659.56 | 1670.46 | 1676.60 | 1678.39 | 1669.15 | 
| Long Term Trade Payables | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Long Term Provisions | 20.78 | 20.17 | 14.69 | 13.16 | 15.44 | 
| Total Non-Current Liabilities | 3181.76 | 3730.26 | 4291.54 | 4197.20 | 4479.28 | 
| Current Liabilities | 0 | 0 | 0 | 0 | 0 | 
| Trade Payables | 193.65 | 168.57 | 314.91 | 286.39 | 426.72 | 
| Sundry Creditors | 193.65 | 168.57 | 314.91 | 286.39 | 426.72 | 
| Acceptances | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Due to Subsidiaries- Trade Payables | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Current Liabilities | 969.25 | 937.90 | 742.61 | 523.87 | 453.26 | 
| Bank Overdraft / Short term credit | 0.00 | 0.00 | 0.13 | 3.03 | 17.78 | 
| Advances received from customers | 29.51 | 30.94 | 29.30 | 21.53 | 13.58 | 
| Interest Accrued But Not Due | 0.59 | 1.24 | 8.52 | 2.52 | 2.23 | 
| Share Application Money | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Current maturity of Debentures & Bonds | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Current maturity - Others | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Liabilities | 939.15 | 905.71 | 704.67 | 496.79 | 419.67 | 
| Short Term Borrowings | 0.00 | 21.77 | 194.93 | 0.02 | 136.30 | 
| Secured ST Loans repayable on Demands | 0.00 | 21.77 | 194.93 | 0.02 | 136.30 | 
| Working Capital Loans- Sec | 0.00 | 21.77 | 194.93 | 0.02 | 136.30 | 
| Buyers Credits - Unsec | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Commercial Borrowings- Unsec | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Unsecured Loans | 0.00 | -21.77 | -194.93 | -0.02 | -136.30 | 
| Short Term Provisions | 22.72 | 21.29 | 20.07 | 18.68 | 19.99 | 
| Proposed Equity Dividend | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Provision for Corporate Dividend Tax | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Provision for Tax | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Provision for post retirement benefits | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Preference Dividend | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Provisions | 22.72 | 21.29 | 20.07 | 18.68 | 19.99 | 
| Total Current Liabilities | 1185.61 | 1149.53 | 1272.52 | 828.96 | 1036.27 | 
| Total Liabilities | 16938.87 | 16445.78 | 16156.46 | 14906.86 | 15547.94 | 
| ASSETS | 0 | 0 | 0 | 0 | 0 | 
| Gross Block | 7793.01 | 7692.84 | 7629.21 | 7586.37 | 7556.20 | 
| Less: Accumulated Depreciation | 2671.10 | 2488.39 | 2281.34 | 2082.53 | 1875.76 | 
| Less: Impairment of Assets | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Net Block | 5121.91 | 5204.45 | 5347.87 | 5503.84 | 5680.44 | 
| Lease Adjustment A/c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Capital Work in Progress | 399.48 | 248.42 | 213.51 | 176.69 | 154.76 | 
| Non Current Investments | 9826.38 | 9826.48 | 9301.53 | 8050.54 | 7927.84 | 
| Long Term Investment | 9826.38 | 9826.48 | 9301.53 | 8050.54 | 7927.84 | 
| Quoted | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Unquoted | 9885.58 | 9885.68 | 9360.73 | 8109.74 | 7987.04 | 
| Long Term Loans & Advances | 798.30 | 270.76 | 256.80 | 292.99 | 247.19 | 
| Other Non Current Assets | 32.54 | 30.16 | 33.82 | 30.17 | 65.28 | 
| Total Non-Current Assets | 16200.10 | 15602.20 | 15175.89 | 14077.04 | 14098.75 | 
| Current Assets  Loans & Advances | 0 | 0 | 0 | 0 | 0 | 
| Currents Investments | 30.18 | 0.00 | 0.00 | 50.04 | 0.00 | 
| Quoted | 30.18 | 0.00 | 0.00 | 50.04 | 0.00 | 
| Unquoted | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Inventories | 25.01 | 26.25 | 25.59 | 20.78 | 19.19 | 
| Raw Materials | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Work-in Progress | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Finished Goods | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Packing Materials | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Stores  and Spare | 17.39 | 18.32 | 17.56 | 15.01 | 13.18 | 
| Other Inventory | 7.62 | 7.94 | 8.03 | 5.77 | 6.01 | 
| Sundry Debtors | 350.15 | 198.91 | 647.23 | 381.93 | 772.52 | 
| Debtors more than Six months | 24.75 | 30.70 | 31.73 | 57.23 | 605.38 | 
| Debtors Others | 341.14 | 183.94 | 630.13 | 339.34 | 185.91 | 
| Cash and Bank | 128.27 | 52.73 | 79.64 | 156.66 | 364.11 | 
| Cash in hand | 1.75 | 2.27 | 1.72 | 1.79 | 1.18 | 
| Balances at Bank | 126.52 | 50.45 | 77.92 | 154.88 | 362.94 | 
| Other cash and bank balances | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Current Assets | 79.60 | 53.36 | 35.03 | 30.53 | 34.64 | 
| Interest accrued on Investments | 40.75 | 10.12 | 0.74 | 1.86 | 1.67 | 
| Interest accrued on Debentures | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Deposits with Government | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Interest accrued and or due on loans | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Prepaid Expenses | 38.85 | 43.24 | 34.30 | 28.68 | 32.97 | 
| Other current_assets | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Short Term Loans and Advances | 125.56 | 512.33 | 193.07 | 189.87 | 258.72 | 
| Advances recoverable in cash or in kind | 38.33 | 134.26 | 50.90 | 96.12 | 204.64 | 
| Advance income tax and TDS | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Amounts due from directors | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Due From Subsidiaries | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Inter corporate deposits | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Corporate Deposits | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Other Loans & Advances | 87.23 | 378.06 | 142.18 | 93.75 | 54.08 | 
| Total Current Assets | 738.77 | 843.58 | 980.57 | 829.82 | 1449.19 | 
| Net Current Assets (Including Current Investments) | -446.85 | -305.95 | -291.95 | 0.86 | 412.92 | 
| Miscellaneous Expenses not written off | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 
| Total Assets | 16938.87 | 16445.78 | 16156.46 | 14906.86 | 15547.94 | 
| Contingent Liabilities | 9.51 | 9.26 | 13.59 | 14.13 | 18.48 | 
| Total Debt | 2280.27 | 3011.94 | 3722.69 | 3417.30 | 3724.95 | 
| Book Value | 15.88 | 14.61 | 13.38 | 12.49 | 12.69 | 
| Adjusted Book Value | 15.88 | 14.61 | 13.38 | 12.49 | 12.69 |