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Provisions - Summary of Changes in Provisions (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of other provisions [line items] |  |
Beginning balance | ₩ 254,162 | ₩ 281,876
Increase (Transfer) | 33,004 | 66,603
Usage | (9,204) | (56,885)
Reversal | (27,092) | (37,432)
Change in scope of consolidation | 1,322 |
Ending balance | 252,192 | 254,162
Current | 165,990 | 175,612
Non-current | 86,202 | 78,550
Litigation [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 64,241 | 58,760
Increase (Transfer) | 17,064 | 42,684
Usage | (3,948) | (35,640)
Reversal | (857) | (1,563)
Ending balance | 76,500 | 64,241
Current | 76,500 | 64,241
Restoration cost [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 113,289 | 118,828
Increase (Transfer) | (1,933) | 6,591
Usage | (2,990) | (5,394)
Reversal | (3,023) | (6,736)
Change in scope of consolidation | 424 |
Ending balance | 105,767 | 113,289
Current | 22,343 | 37,906
Non-current | 83,424 | 75,383
Others [member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 76,632 | 104,288
Increase (Transfer) | 17,873 | 17,328
Usage | (2,266) | (15,851)
Reversal | (23,212) | (29,133)
Change in scope of consolidation | 898 |
Ending balance | 69,925 | 76,632
Current | 67,147 | 73,465
Non-current | ₩ 2,778 | ₩ 3,167

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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 2020-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_d&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_d&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_d&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_c&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 84 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_d&doctype=Standard -URIDate 2020-01-01 + Details
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