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Fair value measurement of liabilities (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value measurement of liabilities [Line Items]
Derivative liabilities	₩ 365,119	₩ 169,960
At fair value | Level 2
Disclosure of fair value measurement of liabilities [Line Items]
Derivative liabilities	365,119	169,960
At fair value | Level 3
Disclosure of fair value measurement of liabilities [Line Items]
Derivative liabilities	₩ 0	₩ 0

X

- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2020-01-01
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-URIDate 2020-01-01

+ Details

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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.

+ Details

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