| Operating income | 
 1 675 454 | 
    1 797 417 | 
    1 847 950 | 
    1 882 604 | 
    1 910 684 | 
 | Revenue | 
 1 538 200 | 
 1 650 688 | 
 1 702 820 | 
 1 728 465 | 
 1 739 179 | 
 | Other operating income | 
  137 254 | 
  146 729 | 
  145 130 | 
  154 139 | 
  171 505 | 
 | Operating expenses | 
 1 584 968 | 
 1 710 111 | 
 1 775 161 | 
 1 809 360 | 
 1 807 141 | 
 | Raw materials and consumables used | 
  911 967 | 
  980 882 | 
  999 246 | 
  991 481 | 
  997 705 | 
 | Payroll expense | 
  304 700 | 
  323 443 | 
  341 179 | 
  363 121 | 
  369 879 | 
 | Depreciation and write-down of tangible and intangible fixed assets | 
 57 805 | 
 61 942 | 
 67 937 | 
 78 192 | 
 72 797 | 
 | Other operating expenses | 
  310 496 | 
  343 844 | 
  366 800 | 
  376 566 | 
  366 761 | 
 | Operating profit | 
 90 487 | 
 87 306 | 
 72 788 | 
 73 244 | 
  103 543 | 
 |   | 
   | 
   | 
   | 
   | 
   | 
 | Income from subsidiaries, other group entities and from associates | 
 16 652 | 
 31 725 | 
 55 919 | 
 34 715 | 
 39 927 | 
 | Interest income | 
 21 932 | 
 29 532 | 
 34 889 | 
 40 861 | 
 29 872 | 
 | Other financial income | 
 43 439 | 
 55 263 | 
 64 471 | 
 58 933 | 
 58 723 | 
 | Interest expense | 
 40 545 | 
 51 329 | 
 60 354 | 
 66 783 | 
 53 749 | 
 | Write-down of financial current and fixed assets | 
 5 997 | 
 7 506 | 
 31 179 | 
 28 653 | 
 14 877 | 
 | Other financial expence | 
 24 414 | 
 37 260 | 
 65 373 | 
 58 625 | 
 45 435 | 
 | Financial items, net | 
 11 068 | 
 20 425 | 
 -1 626 | 
 -19 553 | 
 14 461 | 
 |   | 
   | 
   | 
   | 
   | 
   | 
 | Operating result before tax | 
  101 555 | 
  107 731 | 
 71 162 | 
 53 691 | 
  118 004 | 
 | Extraordinary income | 
 14 486 | 
 22 370 | 
 7 452 | 
 4 120 | 
 5 141 | 
 | Extraordinary expence | 
 6 132 | 
 3 606 | 
 4 702 | 
 2 553 | 
 2 422 | 
 | Tax | 
 29 328 | 
 36 643 | 
 26 700 | 
 26 036 | 
 32 544 | 
 | Net profit | 
 80 581 | 
 89 853 | 
 47 212 | 
 29 222 | 
 88 179 | 
 |   | 
   | 
   | 
   | 
   | 
   | 
 | Transferred to equity | 
 18 312 | 
 22 292 | 
 -38 400 | 
 -72 553 | 
 -32 415 | 
 | Contribution to group companies | 
 10 688 | 
 22 025 | 
 20 694 | 
 24 191 | 
 28 181 | 
 | Proposed dividends | 
 51 582 | 
 45 536 | 
 64 918 | 
 77 584 | 
 92 413 | 
 |   | 
   | 
   | 
   | 
   | 
   | 
 | Number of enterprises | 
  127 690 | 
  132 513 | 
  133 289 | 
  135 523 | 
  131 758 | 
  |