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Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Accumulated Other Comprehensive Income (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Total accumulated other comprehensive income	₩ 194,934	₩ 50,158	₩ 30,985
Changes in investments in associates and joint ventures [member]
Total accumulated other comprehensive income	1,556	(871)	(735)
Loss on derivatives valuation [member]
Total accumulated other comprehensive income	(7,624)	(30,474)
Gain on valuation of financial assets at fair value through other comprehensive income [member]
Total accumulated other comprehensive income	211,573	96,704	52,673
Exchange differences on translation for foreign operations [member]
Total accumulated other comprehensive income	₩ (10,571)	₩ (15,201)	₩ (17,490)

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- Definition

The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

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