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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Intangible Assets |
Schedule of changes in intangible assets |
|  | Goodwill (1) |  | Intangible assets arising from business combinations (2) |  | Software or computer programs |  | Total |
|  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |
Gross Balance |  |  |  |  |  |  |  |  |
Balance as of January 1, 2015 |  | 16,714 |  | 56,249 |  | 109,748 |  | 182,711 |
Acquisitions |  | — |  | — |  | 8,519 |  | 8,519 |
Disposals |  | — |  | — |  | (685 | ) | (685 | )
Impairment loss (*) |  | — |  | — |  | (59 | ) | (59 | )
Balance as of December 31, 2015 |  | 16,714 |  | 56,249 |  | 117,523 |  | 190,486 |
Acquisitions |  | — |  | — |  | 11,248 |  | 11,248 |
Disposals |  | — |  | — |  | (1,757 | ) | (1,757 | )
Impairment loss (*) |  | — |  | — |  | — |  | — |
Balance as of December 31, 2016 |  | 16,714 |  | 56,249 |  | 127,014 |  | 199,977 |
Acquisitions |  | — |  | — |  | 18,779 |  | 18,779 |
Disposals |  | — |  | — |  | (5,790 | ) | (5,790 | )
Impairment loss (*) |  | — |  | — |  | — |  | — |
Balance as of December 31, 2017 |  | 16,714 |  | 56,249 |  | 140,003 |  | 212,966 |
Accumulated Amortization and Impairment |  |  |  |  |  |  |  |  |
Balance as of January 1, 2015 |  | — |  | (32,697 | ) | (83,155 | ) | (115,852 | )
Amortization for the year |  | — |  | (2,285 | ) | (8,331 | ) | (10,616 | )
Disposals |  | — |  | — |  | 682 |  | 682 |
Balance as of December 31, 2015 |  | — |  | (34,982 | ) | (90,804 | ) | (125,786 | )
Amortization for the year |  | — |  | (2,286 | ) | (8,595 | ) | (10,881 | )
Disposals |  | — |  | — |  | 1,726 |  | 1,726 |
Balance as of December 31, 2016 |  | — |  | (37,268 | ) | (97,673 | ) | (134,941 | )
Amortization for the year |  | — |  | (2,285 | ) | (9,075 | ) | (11,360 | )
Disposals |  | — |  | — |  | 5,790 |  | 5,790 |
Balance as of December 31, 2017 |  | — |  | (39,553 | ) | (100,958 | ) | (140,511 | )
Net balance as of December 31, 2015 |  | 16,714 |  | 21,267 |  | 26,719 |  | 64,700 |
Net balance as of December 31, 2016 |  | 16,714 |  | 18,981 |  | 29,341 |  | 65,036 |
Net balance as of December 31, 2017 |  | 16,714 |  | 16,696 |  | 39,045 |  | 72,455 |
| (1) |  | Goodwill corresponds mainly to business combination with Citibank Chile whose amount is of MCh$12,576 that represents the value of synergies to be generated in the combination process and the acquisition of know-how.
| (2) |  | Intangible assets arising from business combinations include assets with indefinite useful lives acquired in the business combination with Citibank Chile.
(*) See Note No. 36(b).
Summary of commitments for technological developments |
|  | Amount of Commitment |
|  | 2016 |  | 2017 |
|  | MCh$ |  | MCh$ |
Software and licenses |  | 3,024 |  | 5,779 |
Summary of goodwill allocated to individual business segments |
|  | 2016 |  | 2017 |
Business Segments |  | MCh$ |  | MCh$ |
Retail |  | 5,928 |  | 5,928 |
Wholesale |  | 2,135 |  | 2,135 |
Treasury and money market operations |  | 4,512 |  | 4,512 |
Subsidiaries |  | 4,139 |  | 4,139 |
Total |  | 16,714 |  | 16,714 |

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