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Maximum exposure to credit risk (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Cash and Cash Equivalents |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | ₩ 1,810,129 | ₩ 1,358,345
Financial assets at fair value through profit or loss |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 747,261 | 920,935
Not Designated as Hedging Instrument |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 165,204 | 37,631
Financial assets at amortized cost |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 13,609 | 14,042
Loans and receivables |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 738,707 | 718,674
Long-term/short-term financial instruments |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 1,960,227 | 2,318,027
Designated as Hedging Instrument |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 145,829 | 64,704
Trade and other receivables |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk |  | 9,703,749 | 9,613,437
Financial guarantee contracts |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Maximum exposure to credit risk | [1] | ₩ 3,338,566 | ₩ 1,310,817
[1] | Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation.

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35K -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 36 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_a&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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