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Investment properties, net (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | ₩ 159,559 |  | ₩ 284,714 | ₩ 353,680
Depreciation | (5,069) |  | (923) | (1,176)
Others | 4,090 | [1] | (124,232) | (67,790)
Endings balance | 158,580 |  | 159,559 | 284,714
Carrying Amount Other than Government Grants |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 159,609 |  | 284,797 |
Depreciation | (5,070) |  | (924) |
Others | 4,054 | [1] | (124,264) |
Endings balance | 158,593 |  | 159,609 | 284,797
Acquisition cost |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 174,741 |  | 300,370 |
Endings balance | 194,487 |  | 174,741 | 300,370
Accumulated depreciation |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | (15,132) |  | (15,573) |
Endings balance | (35,894) |  | (15,132) | (15,573)
Government grants |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | (50) |  | (83) |
Depreciation | 1 |  | 1 |
Others | 36 | [1] | 32 |
Endings balance | (13) |  | (50) | (83)
Investment property - Land |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 139,940 |  | 264,205 |
Depreciation |  |  | (0) |
Others | (10,043) | [1] | (124,265) |
Endings balance | 129,897 |  | 139,940 | 264,205
Investment property - Land | Carrying Amount Other than Government Grants |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 139,940 |  | 264,205 |
Others | (10,043) | [1] | (124,265) |
Endings balance | 129,897 |  | 139,940 | 264,205
Investment property - Land | Acquisition cost |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 139,940 |  | 264,205 |
Endings balance | 129,897 |  | 139,940 | 264,205
Investment property - Buildings |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 19,619 |  | 20,509 |
Depreciation | (5,069) |  | (923) |
Others | 14,133 | [1] | 33 |
Endings balance | 28,683 |  | 19,619 | 20,509
Investment property - Buildings | Carrying Amount Other than Government Grants |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 19,669 |  | 20,592 |
Depreciation | (5,070) |  | (924) |
Others | 14,097 | [1] | 1 |
Endings balance | 28,696 |  | 19,669 | 20,592
Investment property - Buildings | Acquisition cost |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | 34,801 |  | 36,165 |
Endings balance | 64,590 |  | 34,801 | 36,165
Investment property - Buildings | Accumulated depreciation |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | (15,132) |  | (15,573) |
Endings balance | (35,894) |  | (15,132) | (15,573)
Investment property - Buildings | Government grants |  |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |  |
Beginning balance | (50) |  | (83) |
Depreciation | 1 |  | 1 |
Others | 36 | [1] | 32 |
Endings balance | ₩ (13) |  | ₩ (50) | ₩ (83)
[1] | As described in Note 42, the Company reclassified land and buildings amounting to KRW2,765 million and KRW19,369 million, respectively, from assets held-for-sale to investment properties during the year ended December 31, 2019.

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