The details by asset category of the "other intangible assets" of the consolidated financial statements are as follow:
| Cost | IT developments |
| Other assets |
| Total |
| Balance at December 31, 2014 | 4,577,074 |
| 356,868 |
| 4,933,942 |
| Additions | 607,642 |
| 3,647 |
| 611,289 |
| Additions resulting mergers | 759 |
| 1 |
| 760 |
| Write-off | (11,282) |
| - |
| -11,282 |
| Transfers | 28,307 |
| 37,200 |
| 65,507 |
| Balance at December 31, 2015 | 5,202,500 |
| 397,716 |
| 5,600,216 |
| Additions | 652,490 |
| 18,395 |
| 670,885 |
| Additions resulting mergers | 250 |
| 89 |
| 339 |
| Write-off | -450 |
| -10,202 |
| -10,652 |
| Additions / disposals (net) due to change in the scope of consolidation | 4 |
| - |
| 4 |
| Transfers | 12,150 |
| - |
| 12,150 |
| Balance at December 31, 2016 | 5,866,944 |
| 405,998 |
| 6,272,942 |
| Additions | 824,411 |
| 12,072 |
| 836,483 |
| Write-off | (125,307) |
| -7,096 |
| -132,403 |
| Transfers | 4,633 |
| - |
| 4,633 |
| Balance at December 31, 2017 | 6,570,681 |
| 410,974 |
| 6,981,655 |
| Accumulated amortization | IT developments |
| Other assets |
| Total |
| Balance at December 31, 2014 | -2,464,273 |
| -233,532 |
| (2,697,805) |
| Additions | (413,450) |
| -46,861 |
| -460,311 |
| Additions resulting mergers | -115 |
| - |
| (115) |
| Write-off | 10,169 |
| - |
| 10,169 |
| Transfers | 18,675 |
| 13,614 |
| 32,289 |
| Balance at December 31, 2015 | -2,848,994 |
| -266,779 |
| (3,115,773) |
|
|
| ||||
| Additions | (304,046) |
| -24,005 | -328,051 | |
| Additions resulting mergers | -249 |
| - |
| (249) |
| Write-off | 141 |
| 10,202 |
| 10,343 |
| Additions / disposals (net) due to change in the scope of consolidation | -1 |
| - |
| (1) |
| Transfers | 32,167 |
| 3,427 |
| 35,594 |
| Balance at December 31, 2016 | -3,120,982 |
| -277,155 |
| (3,398,137) |
| Additions | (449,709) |
| -21,571 | -471,280 | |
| Write-off | 854 |
| 5,500 |
| 6,354 |
| Transfers | 17,402 |
| 464 |
| 17,866 |
| Balance at December 31, 2017 | -3,552,435 |
| -292,762 |
| (3,845,197) |
| Losses from non-recovery (Impairment) - IT |
|
|
|
|
|
| Balance at December 31, 2014 | (285,834) |
| - |
| -285,834 |
| Impact on net profit (1) | (670,556) |
| -8,698 |
| -679,254 |
| Write-off | (38,412) |
| - |
| -38,412 |
| Balance at December 31, 2015 | (994,802) |
| -8,698 |
| (1,003,500) |
| Impact on net profit | 898 | -6,736 | -5,838 | ||
| Transfers | 16,193 |
| 143 |
| 16,336 |
| Balance at December 31, 2016 | (977,711) |
| -15,291 |
| -993,002 |
| Impact on net profit (2) | (306,110) | - | -306,110 | ||
| Write-off | 441 |
| - |
| 441 |
| Balance at December 31, 2017 | -1,283,380 |
| -15,291 |
| (1,298,671) |
| Carrying amount |
|
|
|
|
|
| Balance at December 31, 2015 | 1,358,704 |
| 122,239 |
| 1,480,943 |
| Balance at December 31, 2016 | 1,768,251 |
| 113,552 |
| 1,881,803 |
| Balance at December 31, 2017 | 1,734,866 |
| 102,921 |
| 1,837,787 |
(1) In 2015, includes impairment loss of assets in the acquisition and development of software in the amount of R$674,780. The loss in the acquisition and development of software was recorded due to obsolescence function and disruption of these systems.
The amortization expenses has been included in the heading “Depreciation and amortization” in the income statement.