The book value of the surplus value assigned to each CGU as of December 31, 2017 amounted to ThUS $ 2,146,692 and ThUS $ 525,858 (ThUS $ 2,176,634 and ThUS $ 533,748 as of December 31, 2016), which include the following Intangible assets of indefinite useful life:
| Air
Transport CGU |
Coalition
and loyalty Program Multiplus CGU |
|||||||||||||||
| As of | As of | As of | As of | |||||||||||||
| December 31, | December 31, | December 31, | December 31, | |||||||||||||
| 2017 | 2016 | 2017 | 2016 | |||||||||||||
| ThUS$ | ThUS$ | ThUS$ | ThUS$ | |||||||||||||
| Airport Slots | 964,513 | 978,849 | - | - | ||||||||||||
| Loyalty program | - | - | 321,440 | 326,262 | ||||||||||||