| Intangible assets as of December 31, 2017 and 2016 are as follows: |
| (In millions of won) | ||||||||||||||||
| December 31, 2017 | ||||||||||||||||
| Acquisition cost |
Accumulated amortization |
Accumulated impairment |
Carrying amount |
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|
Frequency usage rights |
￦ | 4,843,955 | (2,667,015 | ) | — | 2,176,940 | ||||||||||
|
Land usage rights |
65,841 | (50,091 | ) | — | 15,750 | |||||||||||
|
Industrial rights |
166,082 | (54,735 | ) | — | 111,347 | |||||||||||
|
Development costs |
140,460 | (134,828 | ) | (1,529 | ) | 4,103 | ||||||||||
|
Facility usage rights |
153,438 | (116,987 | ) | — | 36,451 | |||||||||||
|
Customer relations |
20,796 | (16,761 | ) | — | 4,035 | |||||||||||
|
Club memberships(*1) |
108,382 | — | (34,768 | ) | 73,614 | |||||||||||
|
Other(*2) |
3,911,749 | (2,733,485 | ) | (13,539 | ) | 1,164,725 | ||||||||||
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| ￦ | 9,410,703 | (5,773,902 | ) | (49,836 | ) | 3,586,965 | ||||||||||
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| (In millions of won) | ||||||||||||||||
| December 31, 2016 | ||||||||||||||||
| Acquisition cost |
Accumulated amortization |
Accumulated impairment |
Carrying amount |
|||||||||||||
|
Frequency usage rights |
￦ | 4,843,955 | (2,263,127 | ) | — | 2,580,828 | ||||||||||
|
Land usage rights |
65,148 | (44,314 | ) | — | 20,834 | |||||||||||
|
Industrial rights |
160,897 | (39,697 | ) | — | 121,200 | |||||||||||
|
Development costs |
141,727 | (136,446 | ) | (410 | ) | 4,871 | ||||||||||
|
Facility usage rights |
151,906 | (110,118 | ) | — | 41,788 | |||||||||||
|
Customer relations |
19,742 | (13,090 | ) | — | 6,652 | |||||||||||
|
Club memberships(*1) |
113,161 | — | (39,122 | ) | 74,039 | |||||||||||
|
Other(*2) |
3,315,921 | (2,386,992 | ) | (2,787 | ) | 926,142 | ||||||||||
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| ￦ | 8,812,457 | (4,993,784 | ) | (42,319 | ) | 3,776,354 | ||||||||||
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| (*1) | Club memberships are classified as intangible assets with indefinite useful life and are not amortized. |
| (*2) | Other intangible assets primarily consist of computer software and usage rights to a research facility which the Group built and donated, and the Group is given rights-to-use for a definite number of years in turn. |