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Leases - Additional Information (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Arrangement Involving Legal Form Of Lease [Abstract] |  |
Depreciation property plant and equipment | ₩ 63,070 |
Operating lease expenses incurred |  | ₩ 132,225
Cash outflow for leases | 532,730 |
Increase decrease in right of use assets | 426,965 |
Increase decrease in investment property | ₩ 73,119 |

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- Definition The cash outflow for leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_g&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Depreciation recognised finance lease as other property plant and equipment. + References No definition available. + Details
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- Definition Disclosure Of arrangement involving legal form of lease. + References No definition available. + Details
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- Definition Increase Decrease In Investment Property + References No definition available. + Details
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- Definition Increase Decrease In Right Of Use Assets + References No definition available. + Details
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- Definition operating lease expenses. + References No definition available. + Details
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