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Fair Value - Summary of Valuation Techniques and Inputs (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Other financial assets |  |  |
Derivative financial assets for hedging purpose | ₩ 7,389 | ₩ 227,318 |
Available-for-sale financial assets | 380,953 | 404,774 | ₩ 360,037
Investment properties | 1,189,531 | 1,148,044 | ₩ 1,102,070
Other financial liabilities |  |  |
Derivative financial liabilities for hedging purpose | 93,770 | 14,928 |
Borrowings | 6,683,662 | 8,120,791 |
Recurring fair value measurement [Member] |  |  |
Other financial assets |  |  |
Derivative financial assets for hedging purpose | 7,389 | 227,318 |
Available-for-sale financial assets | 319,402 | 299,001 |
Other financial liabilities |  |  |
Derivative financial liabilities for hedging purpose | 93,770 | 14,928 |
Recurring fair value measurement [Member] | Level 3 [Member] |  |  |
Other financial assets |  |  |
Available-for-sale financial assets | 307,077 | 287,889 |
Other financial liabilities |  |  |
Derivative financial liabilities for hedging purpose | 17,725 |  |
Recurring fair value measurement [Member] | Level 3 [Member] | Financial assets at fair value through profit or loss [member] |  |  |
Other financial assets |  |  |
Others | 5,813 | 6,277 |
Other financial liabilities |  |  |
Other derivative financial liabilities | ₩ 5,051 | ₩ 1,973 |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Discounted cash flow model Comparable Company Analysis | Discounted cash flow model Comparable Company Analysis |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Discounted cash flow model Comparable Company Analysis | Discounted cash flow model Comparable Company Analysis |
Recurring fair value measurement [Member] | Level 2 [Member] |  |  |
Other financial assets |  |  |
Derivative financial assets for hedging purpose | ₩ 7,389 | ₩ 227,318 |
Available-for-sale financial assets | 5,466 | 5,725 |
Other financial liabilities |  |  |
Derivative financial liabilities for hedging purpose | ₩ 76,045 | ₩ 14,928 |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques |  | Discounted cash flow model |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques |  | Discounted cash flow model |
Recurring fair value measurement [Member] | Level 2, 3 [Member] |  |  |
Other financial assets |  |  |
Available-for-sale financial assets | ₩ 312,543 | ₩ 293,614 |
Other financial liabilities |  |  |
Derivative financial liabilities for hedging purpose | ₩ 93,770 |  |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Hull-White Model, Discounted cash flow model |  |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Hull-White Model, Discounted cash flow model |  |
Not measured at fair value in statement of financial position but for which fair value is disclosed [Member] |  |  |
Other financial assets |  |  |
Investment properties | ₩ 1,755,600 | ₩ 1,962,779 |
Other financial liabilities |  |  |
Borrowings | 6,738,326 | 8,184,195 |
Not measured at fair value in statement of financial position but for which fair value is disclosed [Member] | Level 3 [Member] |  |  |
Other financial assets |  |  |
Investment properties | 1,755,600 | 1,962,779 |
Other financial liabilities |  |  |
Borrowings | ₩ 6,738,326 | ₩ 8,184,195 |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |
Valuation techniques | Discounted cash flow model | Discounted cash flow model |

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- Definition The amount of non-derivative financial assets that are designated as available for sale or are not classified as (a) loans and receivables; (b) held-to-maturity investments; or (c) financial assets at fair value through profit or loss. [Refer: Derivative financial assets; Financial assets at fair value through profit or loss; Held-to-maturity investments] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_d&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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