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Provisions - Summary of Changes in Provisions (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2018 | Jan. 01, 2017
Disclosure of other provisions [line items] |  |  |  |
Beginning balance | ₩ 203,030 | ₩ 197,179 |  |
Increase (Transfer) | 103,946 | 48,219 |  |
Usage | (17,963) | (26,300) |  |
Reversal | (7,137) | (16,024) |  |
Change in scope of consolidation |  | (44) |  |
Ending balance | 281,876 | 203,030 |  |
Current | 117,881 | 78,172 | ₩ 78,349 | ₩ 96,485
Non-current | 163,995 | 124,858 |  | ₩ 100,694
Litigation [member] |  |  |  |
Disclosure of other provisions [line items] |  |  |  |
Beginning balance | 18,306 | 19,038 |  |
Increase (Transfer) | 44,593 | 3,842 |  |
Usage | (3,002) | (1,740) |  |
Reversal | (1,137) | (2,834) |  |
Ending balance | 58,760 | 18,306 |  |
Current | 14,513 | 17,238 |  |
Non-current | 44,247 | 1,068 |  |
Restoration cost [member] |  |  |  |
Disclosure of other provisions [line items] |  |  |  |
Beginning balance | 100,216 | 101,312 |  |
Increase (Transfer) | 25,975 | 2,827 |  |
Usage | (3,181) | (2,178) |  |
Reversal | (4,182) | (1,723) |  |
Change in scope of consolidation |  | (22) |  |
Ending balance | 118,828 | 100,216 |  |
Current | 1,736 | 1,766 |  |
Non-current | 117,092 | 98,450 |  |
Others [member] |  |  |  |
Disclosure of other provisions [line items] |  |  |  |
Beginning balance | 84,508 | 76,829 |  |
Increase (Transfer) | 33,378 | 41,550 |  |
Usage | (11,780) | (22,382) |  |
Reversal | (1,818) | (11,467) |  |
Change in scope of consolidation |  | (22) |  |
Ending balance | 104,288 | 84,508 |  |
Current | 101,632 | 59,168 |  |
Non-current | ₩ 2,656 | ₩ 25,340 |  |

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- Definition The decrease in other provisions resulting from the loss of control of a subsidiary. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in other provisions resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_d&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_d&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of current provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_d&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount reversed for unused other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84_d&doctype=Standard -URIDate 2018-03-16 + Details
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