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Investment Properties - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about investment property [line items]
Fair value of investment properties	₩ 2,304,583	₩ 1,821,061
Rental income from investment properties	198,636	207,795
Future minimum lease fee	279,792	705,182
Less than 1 year [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	100,443	287,149
1-5 years [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	120,939	389,057
More than 5 years [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	₩ 58,410	₩ 28,976

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of investment property, for which fair value was used as deemed cost in the opening IFRS statement of financial position. [Refer: Investment property]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 1
-IssueDate 2019-01-01
-Paragraph 30
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2019-en-r&anchor=para_30&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of rental income arising from investment property recognised in profit or loss. [Refer: Investment property]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2019-01-01
-Paragraph 75
-Subparagraph f
-Clause i
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- Definition

The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 97
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-URIDate 2019-03-27

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