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Maturity analysis for non-derivative financial liabilities (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Borrowings and debt securities |  | ₩ 80,399,789 | ₩ 72,934,694
Finance lease liabilities |  | 5,757,009 | 381,742
Trade and other payables |  | 8,545,029 | 9,063,285
Financial guarantee contracts | [1] | 3,338,566 | 1,310,817
Non-derivative financial liabilities, undiscounted cash flows |  | 98,040,393 | 83,690,538
Less than 1 year |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Borrowings and debt securities |  | 10,660,737 | 10,204,471
Finance lease liabilities |  | 686,445 | 87,709
Trade and other payables |  | 6,014,054 | 6,348,195
Financial guarantee contracts | [1] | 937,091 | 91,722
Non-derivative financial liabilities, undiscounted cash flows |  | 18,298,327 | 16,732,097
1~2 Years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Borrowings and debt securities |  | 10,997,510 | 9,274,378
Finance lease liabilities |  | 617,449 | 87,709
Trade and other payables |  | 382,809 | 150,479
Financial guarantee contracts | [1] | 302,186 | 855,488
Non-derivative financial liabilities, undiscounted cash flows |  | 12,299,954 | 10,368,054
2~5 Years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Borrowings and debt securities |  | 27,881,873 | 28,143,311
Finance lease liabilities |  | 1,717,434 | 141,074
Trade and other payables |  | 971,469 | 375,661
Financial guarantee contracts | [1] | 32,314 | 363,607
Non-derivative financial liabilities, undiscounted cash flows |  | 30,603,090 | 29,023,653
More than 5 years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Borrowings and debt securities |  | 30,859,669 | 25,312,534
Finance lease liabilities |  | 2,735,681 | 65,250
Trade and other payables |  | 1,176,697 | 2,188,950
Financial guarantee contracts | [1] | 2,066,975 | 0
Non-derivative financial liabilities, undiscounted cash flows |  | ₩ 36,839,022 | ₩ 27,566,734
[1] | This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2018 and 2019 are KRW15,586 million and KRW 81,357 million, respectively.

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- Definition The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 58 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_58&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph B11D -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_B11D_a&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The amount of contractual undiscounted cash flows in relation to non-derivative financial liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 39 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_39_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 + Details
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