| Annual Financials |  2015   |  2016   |  2017   |  2018   |  2019   |  2020   |  2021   |  2022   |  2023   |  2024   |  2025   |  TTM   | 
|  Revenue  |  496   |  522   |  547   |  570   |  628   |  609   |  581   |  724   |  774   |  810   |  790   |  786   | 
| Expenses |  444   |  461   |  481   |  513   |  567   |  538   |  509   |  655   |  719   |  748   |  729   |  725   | 
|  EBITDA  |  53   |  62   |  65   |  57   |  62   |  70   |  72   |  68   |  55   |  63   |  61   |  61   | 
| Operating Profit % |  10 %  |  11 %  |  12 %  |  10 %  |  10 %  |  11 %  |  12 %  |  9 %  |  6 %  |  7 %  |  7 %  |  7 %  | 
| Depreciation |  6   |  6   |  11   |  12   |  12   |  17   |  16   |  16   |  16   |  15   |  15   |  15   | 
| Interest |  4   |  4   |  8   |  8   |  8   |  2   |  3   |  3   |  2   |  1   |  1   |  2   | 
|  Profit Before Tax  |  43   |  52   |  47   |  38   |  42   |  52   |  53   |  49   |  37   |  46   |  45   |  44   | 
| Tax |  13   |  14   |  14   |  11   |  10   |  14   |  16   |  12   |  10   |  12   |  12   |  12   | 
| Net Profit |  30   |  38   |  33   |  27   |  31   |  37   |  37   |  37   |  27   |  35   |  33   |  33   | 
| EPS in ₹ |  23.13   |  28.99   |  12.58   |  10.51   |  11.99   |  14.30   |  14.37   |  14.12   |  10.33   |  13.28   |  12.87   |  12.60   | 












