| | Promigas S.A. and subsidiaries | | | Concesionaria Vial de los Andes S.A. | | | Proyectos de Infraestructura S.A. Pisa and subsidiaries | | | Episol S.A.S. and subsidiaries | | | Total | | |||||
Cost | | | | | | | | | | | | | | | | | | | | |
At December 31, 2015 | | Ps. | 1,884,476 | | | Ps. | 554,037 | | | Ps. | 262,406 | | | Ps. | 72,391 | | | Ps. | 2,773,310 | |
Additions | | | 421,202 | | | | 96,621 | | | | 11,150 | | | | 83,206 | | | | 612,179 | |
Reclassification to PPE | | | 68,587 | | | | - | | | | 3 | | | | 1 | | | | 68,591 | |
Withdrawals / Sales | | | (4,334 | ) | | | (17 | ) | | | - | | | | - | | | | (4,351 | ) |
At December 31, 2016 | | Ps. | 2,369,931 | | | Ps. | 650,641 | | | Ps. | 273,559 | | | Ps. | 155,598 | | | Ps. | 3,449,729 | |
Additions | | | 193,489 | | | | 82,629 | | | | 29,305 | | | | 305,486 | | | | 610,909 | |
Reclassification to PPE | | | (14,408 | ) | | | - | | | | - | | | | - | | | | (14,408 | ) |
Withdrawals / Sales | | | (1,915 | ) | | | (1,590 | ) | | | - | | | | - | | | | (3,505 | ) |
Foreign exchange adjustment | | | (1,041 | ) | | | - | | | | - | | | | - | | | | (1,041 | ) |
At December 31, 2017 | | Ps. | 2,546,056 | | | Ps. | 731,680 | | | Ps. | 302,864 | | | Ps. | 461,084 | | | Ps. | 4,041,684 | |
| | | | | | | | | | | | | | | | | | | | |
Accumulated Amortization | | | | | | | | | | | | | | | | | | | | |
At December 31, 2015 | | | (149,743 | ) | | Ps. | (210,657 | ) | | Ps. | (18,971 | ) | | Ps. | (3,237 | ) | | Ps. | (382,608 | ) |
Amortization of the year | | | (100,850 | ) | | | (148,749 | ) | | | (9,485 | ) | | | (1,583 | ) | | | (260,667 | ) |
Reclassification to PPE | | | (2,111 | ) | | | - | | | | (2 | ) | | | - | | | | (2,113 | ) |
Withdrawals / sales | | | 973 | | | | - | | | | - | | | | - | | | | 973 | |
At December 31, 2016 | | Ps. | (251,731 | ) | | Ps. | (359,406 | ) | | Ps. | (28,458 | ) | | Ps. | (4,820 | ) | | Ps. | (644,415 | ) |
Amortization of the year | | | (119,549 | ) | | | (153,212 | ) | | | (10,083 | ) | | | (1,645 | ) | | | (284,489 | ) |
Reclassification to PPE | | | 841 | | | | - | | | | - | | | | - | | | | 841 | |
Withdrawals / sales | | | 630 | | | | - | | | | - | | | | - | | | | 630 | |
Foreign exchange adjustment | | | (84 | ) | | | - | | | | - | | | | - | | | | (84 | ) |
At December 31, 2017 | | Ps. | (369,893 | ) | | Ps. | (512,618 | ) | | Ps. | (38,541 | ) | | Ps. | (6,465 | ) | | Ps. | (927,517 | ) |
| | | | | | | | | | | | | | | | | | | | |
Total Intangible Assets | | | | | | | | | | | | | | | | | | | | |
Balance at December 31, 2015 | | Ps. | 1,734,733 | | | Ps. | 343,380 | | | Ps. | 243,435 | | | Ps. | 69,154 | | | Ps. | 2,390,702 | |
Cost | | | 485,455 | | | | 96,604 | | | | 11,153 | | | | 83,207 | | | | 676,419 | |
Amortization | | | (101,988 | ) | | | (148,749 | ) | | | (9,487 | ) | | | (1,583 | ) | | | (261,807 | ) |
Balance at December 31, 2016 | | Ps. | 2,118,200 | | | Ps. | 291,235 | | | Ps. | 245,101 | | | Ps. | 150,778 | | | Ps. | 2,805,314 | |
Cost | | | 176,125 | | | | 81,039 | | | | 29,305 | | | | 305,486 | | | | 591,955 | |
Amortization | | | (118,162 | ) | | | (153,212 | ) | | | (10,083 | ) | | | (1,645 | ) | | | (283,102 | ) |
Balance at December 31, 2017 | | Ps. | 2,176,163 | | | Ps. | 219,062 | | | Ps. | 264,323 | | | Ps. | 454,619 | | | Ps. | 3,114,167 | |