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Provisions - Summary of Changes in Provisions (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of other provisions [line items] |  |
Beginning balance | ₩ 281,876 | ₩ 203,030
Increase (Transfer) | 66,603 | 103,946
Usage | (56,885) | (17,963)
Reversal | (37,432) | (7,137)
Ending balance | 254,162 | 281,876
Current | 175,612 | 117,881
Non-current | 78,550 | 163,995
Litigation [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 58,760 | 18,306
Increase (Transfer) | 42,684 | 44,593
Usage | (35,640) | (3,002)
Reversal | (1,563) | (1,137)
Ending balance | 64,241 | 58,760
Current | 64,241 | 14,513
Non-current | 0 | 44,247
Restoration cost [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 118,828 | 100,216
Increase (Transfer) | 6,591 | 25,975
Usage | (5,394) | (3,181)
Reversal | (6,736) | (4,182)
Ending balance | 113,289 | 118,828
Current | 37,906 | 1,736
Non-current | 75,383 | 117,092
Others [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 104,288 | 84,508
Increase (Transfer) | 17,328 | 33,378
Usage | (15,851) | (11,780)
Reversal | (29,133) | (1,818)
Ending balance | 76,632 | 104,288
Current | 73,465 | 101,632
Non-current | ₩ 3,167 | ₩ 2,656

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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 2019-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_d&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_d&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_d&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount used (ie incurred 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 2019-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_c&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 84 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_d&doctype=Standard -URIDate 2019-03-27 + Details
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