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Financial Risk Management - Summary of Group's Recognized Financial Assets Subject to Enforceable Master Netting Arrangements or Similar Agreements (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of offsetting of financial assets [line items] |  |
Gross assets | ₩ 85,058 | ₩ 98,658
Gross liabilities offset | (14) | (1)
Net amounts presented in the statement of financial position | 85,044 | 98,657
Amounts not offset, Financial instruments | (82,130) | (96,239)
Amounts not offset, Cash collateral | 0 | 0
Net amount | 2,914 | 2,418
Trade receivables [member] |  |
Disclosure of offsetting of financial assets [line items] |  |
Gross assets | 66,487 | 78,833
Gross liabilities offset | (1) | (1)
Net amounts presented in the statement of financial position | 66,486 | 78,832
Amounts not offset, Financial instruments | (63,604) | (76,414)
Amounts not offset, Cash collateral | 0 | 0
Net amount | 2,882 | 2,418
Other Financial Assets1 [member] |  |
Disclosure of offsetting of financial assets [line items] |  |
Gross assets | 18,571 | 19,825
Gross liabilities offset | (13) |
Net amounts presented in the statement of financial position | 18,558 | 19,825
Amounts not offset, Financial instruments | (18,526) | (19,825)
Amounts not offset, Cash collateral | 0 | ₩ 0
Net amount | ₩ 32 |

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- Definition The amount of cash collateral received that is subject to an enforceable master netting arrangement or similar agreement and that is not set off against financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG40D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_IG40D&doctype=Implementation%20Guidance -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 13C -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_13C_d_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG40D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_IG40D&doctype=Implementation%20Guidance -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 13C -Subparagraph d -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_13C_d_i&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The gross amount of recognised financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 13C -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_13C_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of financial liabilities set off against financial assets when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 13C -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_13C_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount remaining after deducting the amounts subject to an enforceable master netting arrangement or similar agreement that were not set off against financial assets, from the net amount of financial assets subject to offsetting or subject to an enforceable master netting arrangement or similar agreement presented in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 13C -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_13C_e&doctype=Standard -URIDate 2019-03-27 + Details
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