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Financial Risk Management - Summary of Contractual Undiscounted Cash Flows (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
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Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Trade and other payables | ₩ 9,324,730 |  | ₩ 8,953,444
Borrowings(including debentures) | 8,216,212 |  | 7,554,564
Lease liabilities | 807,233 | ₩ 807,233 | 163,858
Other non-derivative financial liabilities | 196,475 |  | 175,633
Financial guarantee contracts | 19,422 |  | 65,760
Total | 18,541,624 |  | 16,749,401
Less than 1 year [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Trade and other payables | 8,149,445 |  | 7,287,436
Borrowings(including debentures) | 1,304,936 |  | 1,507,232
Lease liabilities | 356,797 |  |
Other non-derivative financial liabilities | 1,749 |  | 6,123
Financial guarantee contracts | 19,422 |  | 52,734
Total | 9,832,349 |  | 8,853,525
1-5 years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Trade and other payables | 805,241 |  | 1,173,579
Borrowings(including debentures) | 4,417,639 |  | 3,669,060
Lease liabilities | 378,258 |  |
Other non-derivative financial liabilities | 175,764 |  | 37,358
Financial guarantee contracts | 0 |  | 13,026
Total | 5,776,902 |  | 4,893,023
More than 5 years [member] |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |  |
Trade and other payables | 370,044 |  | 492,429
Borrowings(including debentures) | 2,493,637 |  | 2,378,272
Lease liabilities | 49,730 |  |
Other non-derivative financial liabilities | 18,962 |  | 132,152
Financial guarantee contracts | 0 |  |
Total | ₩ 2,932,373 |  | ₩ 3,002,853

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- Definition The amount of contractual undiscounted cash flows in relation to bank borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph B11D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG31A -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2019-03-27 + Details
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