XML 93 R78.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Risk Management (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Summary of Maximum Exposure to Credit Risk | As of December 31, 2016 and 2017, maximum exposure to credit risk is as follows.
(In millions of Korean won) |  | 2016 |  |  | 2017 |
Cash equivalents(except cash on hand) |  | ￦ | 2,875,383 |  |  | ￦ | 1,926,620 |
Trade and other receivables |  |  | 6,036,363 |  |  |  | 6,643,115 |
Other financial assets |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  |  | 6,277 |  |  |  | 5,813 |
Derivative used for hedging |  |  | 227,318 |  |  |  | 7,389 |
Time deposits and others |  |  | 716,769 |  |  |  | 1,333,317 |
Available-for-sale financial assets |  |  | 26,684 |  |  |  | 9,899 |
Held-to-maturity financial assets |  |  | 30,143 |  |  |  | 151 |
Financial guarantee contracts 1 |  |  | 56,373 |  |  |  | 143,969 |
Total |  | ￦ | 9,975,310 |  |  | ￦ | 10,070,273 |
| 1 | Total amounts guaranteed by the Group according to the guarantee contracts.
Summary of Contractual Undiscounted Cash Flows | The table below analyzes the Group’s liabilities (including interest expenses) into relevant maturity groups based on the remaining period at the date of the end of each reporting period to the contractual maturity date. These amounts are contractual undiscounted cash flows.
|  | 2016.12.31 |
(In millions of Korean won) |  | Less than 1 year |  |  | 1-5 years |  |  | More than 5 years |  |  | Total |
Trade and other payables |  | ￦ | 7,682,604 |  |  | ￦ | 1,121,452 |  |  | ￦ | 217,411 |  |  | ￦ | 9,021,467 |
Borrowings(including debentures) |  |  | 2,034,524 |  |  |  | 4,834,151 |  |  |  | 2,458,749 |  |  |  | 9,327,424 |
Other non-derivative financial liabilities |  |  | 233 |  |  |  | 3,272 |  |  |  | 22,917 |  |  |  | 26,422 |
Financial guarantee contracts1 |  |  | 56,373 |  |  |  | — |  |  |  | — |  |  |  | 56,373 |
Total |  | ￦ | 9,773,734 |  |  | ￦ | 5,958,875 |  |  | ￦ | 2,699,077 |  |  | ￦ | 18,431,686 |
|  | 2017.12.31 |
(In millions of Korean won) |  | Less than 1 year |  |  | 1-5 years |  |  | More than 5 years |  |  | Total |
Trade and other payables |  | ￦ | 7,880,906 |  |  | ￦ | 1,219,835 |  |  | ￦ | 161,497 |  |  | ￦ | 9,262,238 |
Borrowings(including debentures) |  |  | 1,623,996 |  |  |  | 3,666,726 |  |  |  | 2,317,209 |  |  |  | 7,607,931 |
Other non-derivative financial liabilities |  |  | 4,117 |  |  |  | 8,452 |  |  |  | — |  |  |  | 12,569 |
Financial guarantee contracts1 |  |  | 26,738 |  |  |  | — |  |  |  | — |  |  |  | 26,738 |
Total |  | ￦ | 9,535,757 |  |  | ￦ | 4,895,013 |  |  | ￦ | 2,478,706 |  |  | ￦ | 16,909,476 |
| 1 | Total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.
Summary of Cash Outflow and Inflow of Derivatives Settled Gross or Net are Undiscounted Contractual Cash Flow |
|  | 2015.12.31 |
(In millions of Korean won) |  | Less than 1 year |  |  | 1-5 years |  |  | More than 5 years |  |  | Total |
Outflow |  | ￦ | 335,970 |  |  | ￦ | 2,138,379 |  |  | ￦ | 38,184 |  |  | ￦ | 2,512,533 |
Inflow |  |  | 276,066 |  |  |  | 2,284,219 |  |  |  | 46,194 |  |  |  | 2,606,479 |
|  | 2016.12.31 |
(In millions of Korean won) |  | Less than 1 year |  |  | 1-5 years |  |  | More than 5 years |  |  | Total |
Outflow |  | ￦ | 1,174,147 |  |  | ￦ | 1,176,715 |  |  | ￦ | 536,005 |  |  | ￦ | 2,886,867 |
Inflow |  |  | 1,302,112 |  |  |  | 1,306,199 |  |  |  | 588,559 |  |  |  | 3,196,870 |
|  | 2017.12.31 |
(In millions of Korean won) |  | Less than 1 year |  |  | 1-5 years |  |  | More than 5 years |  |  | Total |
Outflow |  | ￦ | 638,171 |  |  | ￦ | 546,791 |  |  | ￦ | 526,633 |  |  | ￦ | 1,711,595 |
Inflow |  |  | 608,270 |  |  |  | 568,976 |  |  |  | 509,558 |  |  |  | 1,686,804 |
Summary of Debt-to-equity Ratios | The debt-to-equity ratios as of December 31, 2016 and 2017, are as follows:
(In millions of Korean won) |  | 2016 |  |  | 2017 |
Total liabilities |  | ￦ | 17,881,580 |  |  | ￦ | 16,696,309 |
Total equity |  |  | 12,782,718 |  |  |  | 13,049,130 |
Debt-to-equity ratio |  |  | 140 | % |  |  | 128 | %
Summary of Gearing Ratios | The gearing ratios as of December 31, 2016 and 2017, are as follows:
(In millions of Korean won, %) |  | 2016 |  |  | 2017 |
Total borrowings |  | ￦ | 8,301,505 |  |  | ￦ | 6,860,539 |
Less: cash and cash equivalents |  |  | (2,900,311 | ) |  |  | (1,928,182 | )
Net debt |  |  | 5,401,194 |  |  |  | 4,932,357 |
Total equity |  |  | 12,782,718 |  |  |  | 13,049,130 |
Total capital |  |  | 18,183,912 |  |  |  | 17,981,487 |
Gearing ratio |  |  | 30 | % |  |  | 27 | %
Summary of Group's Recognized Financial Assets Subject to Enforceable Master Netting Arrangements or Similar Agreements | Details of the Group’s recognized financial assets subject to enforceable master netting arrangements or similar agreements are as follows:
(In millions of Korean won) |  | 2016 |
|  | Gross assets |  |  | Gross liabilities offset |  |  | Net amounts presented in the statement of financial position |  |  | Amounts not offset |  |  | Net amount |
|  |  |  | Financial instruments |  |  | Cash collateral |  |
Derivative assets for hedging purpose1 |  | ￦ | 35,334 |  |  | ￦ | — |  |  | ￦ | 35,334 |  |  | ￦ | (5,707 | ) |  | ￦ | — |  |  | ￦ | 29,627 |
Trade receivables2 |  |  | 95,865 |  |  |  | — |  |  |  | 95,865 |  |  |  | (91,662 | ) |  |  | — |  |  |  | 4,203 |
|  | ￦ | 131,199 |  |  | ￦ | — |  |  | ￦ | 131,199 |  |  | ￦ | (97,369 | ) |  | ￦ | — |  |  | ￦ | 33,830 |
(In millions of Korean won) |  | 2017 |
|  | Gross assets |  |  | Gross liabilities offset |  |  | Net amounts presented in the statement of financial position |  |  | Amounts not offset |  |  | Net amount |
|  |  |  | Financial instruments |  |  | Cash collateral |  |
Derivative assets for hedging purpose1 |  | ￦ | 3,284 |  |  | ￦ | — |  |  | ￦ | 3,284 |  |  | ￦ | (3,284 | ) |  | ￦ | — |  |  | ￦ | — |
Trade receivables2 |  |  | 85,755 |  |  |  | (5,010 | ) |  |  | 80,745 |  |  |  | (73,109 | ) |  |  | — |  |  |  | 7,636 |
Other financial assets |  |  | 8,680 |  |  |  | (436 | ) |  |  | 8,244 |  |  |  | (5,307 | ) |  |  | — |  |  |  | 2,937 |
|  | ￦ | 97,719 |  |  | ￦ | (5,446 | ) |  | ￦ | 92,273 |  |  | ￦ | (81,700 | ) |  | ￦ | — |  |  | ￦ | 10,573 |
| 1 | The amount applied with master netting arrangements under the standard contract of International Swap and Derivatives Association (ISDA).
| 2 | The amount applied with netting arrangements under the reference offer of the telecommunication facility interconnection and sharing data among telecommunications companies.
Summary of Group's Recognized Financial Liabilities Subject to Enforceable Master Netting Arrangements or Similar Agreements | The Group’s recognized financial liabilities subject to enforceable master netting arrangements or similar agreements are as follows:
(In millions of Korean won) |  | 2016 |
|  | Gross liabilities |  |  | Gross assets offset |  |  | Net amounts presented in the statement of financial position |  |  | Amounts not offset |  |  | Net amount |
|  |  |  | Financial instruments |  |  | Cash collateral |  |
Derivative liabilities for hedging purpose 1 |  | ￦ | 20,627 |  |  | ￦ | — |  |  | ￦ | 20,627 |  |  | ￦ | (20,627 | ) |  | ￦ | — |  |  | ￦ | — |
Trade payables2 |  |  | 90,435 |  |  |  | — |  |  |  | 90,435 |  |  |  | (86,184 | ) |  |  | — |  |  |  | 4,251 |
Other payables2 |  |  | 48 |  |  |  | (4 | ) |  |  | 44 |  |  |  | — |  |  |  | — |  |  |  | 44 |
|  | ￦ | 111,110 |  |  | ￦ | (4 | ) |  | ￦ | 111,106 |  |  | ￦ | (106,811 | ) |  | ￦ | — |  |  | ￦ | 4,295 |
(In millions of Korean won) |  | 2017 |
|  | Gross liabilities |  |  | Gross assets offset |  |  | Net amounts presented in the statement of financial position |  |  | Amounts not offset |  |  | Net amount |
|  |  |  | Financial instruments |  |  | Cash collateral |  |
Derivative liabilities for hedging purpose 1 |  | ￦ | 26,135 |  |  | ￦ | — |  |  | ￦ | 26,135 |  |  | ￦ | (3,284 | ) |  | ￦ | — |  |  | ￦ | 22,851 |
Trade payables2 |  |  | 80,829 |  |  |  | (5,217 | ) |  |  | 75,612 |  |  |  | (73,109 | ) |  |  | — |  |  |  | 2,503 |
Other financial liabilities |  |  | 5,549 |  |  |  | (229 | ) |  |  | 5,320 |  |  |  | (5,307 | ) |  |  | — |  |  |  | 13 |
|  | ￦ | 112,513 |  |  | ￦ | (5,446 | ) |  | ￦ | 107,067 |  |  | ￦ | (81,700 | ) |  | ￦ | — |  |  | ￦ | 25,367 |
| 1 | The amount applied with master netting arrangements under the standard contract of International Swap and Derivatives Association (ISDA).
| 2 | The amount applied with netting arrangements under the reference offer of the telecommunication facility interconnection and sharing data among telecommunications companies.
Currency risk [Member] |
Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity | As of December 31, 2015, 2016 and 2017, if the foreign exchange rate had strengthened/weakened by 10% with all other variables held constant, the effects on profit before income tax and shareholders’ equity would have been as follows:
(In millions of Korean won) |  | Fluctuation of foreign exchange rate |  |  | Income before tax |  |  | Shareholders’ equity |
2015.12.31 |  |  | 10 | % |  | ￦ | (52,157 | ) |  | ￦ | (45,632 | )
|  | -10 | % |  |  | 52,157 |  |  |  | 45,632 |
2016.12.31 |  |  | 10 | % |  |  | (28,134 | ) |  |  | (23,817 | )
|  | -10 | % |  |  | 28,134 |  |  |  | 23,817 |
2017.12.31 |  |  | 10 | % |  |  | (10,132 | ) |  |  | (7,273 | )
|  | -10 | % |  |  | 10,132 |  |  |  | 7,273 |
Summary of Details of Financial Assets and Liabilities in Foreign Currencies | Details of financial assets and liabilities in foreign currencies as of December 31, 2015, 2016 and 2017, are as follows:
|  | 2015 |  |  | 2016 |  |  |  |  |  | 2017 |
(In thousands) |  | Financial assets |  |  | Financial liabilities |  |  | Financial assets |  |  | Financial liabilities |  |  | Financial assets |  |  | Financial liabilities |
USD |  |  | 183,254 |  |  |  | 2,351,003 |  |  |  | 210,474 |  |  |  | 2,536,090 |  |  |  | 236,476 |  |  |  | 1,908,831 |
SDR1 |  |  | 444 |  |  |  | 849 |  |  |  | 311 |  |  |  | 737 |  |  |  | 306 |  |  |  | 738 |
JPY |  |  | 73,716 |  |  |  | 40,279,411 |  |  |  | 80,555 |  |  |  | 21,802,051 |  |  |  | 28,267 |  |  |  | 21,801,443 |
GBP |  |  | 8 |  |  |  | 888 |  |  |  | 1 |  |  |  | 151 |  |  |  | — |  |  |  | 74 |
EUR |  |  | 29 |  |  |  | 29 |  |  |  | 40 |  |  |  | 2,571 |  |  |  | 186 |  |  |  | 3,625 |
DZD2 |  |  | — |  |  |  | — |  |  |  | 471 |  |  |  | — |  |  |  | 47 |  |  |  | — |
CNY |  |  | 15,562 |  |  |  | 107 |  |  |  | 15,262 |  |  |  | 381 |  |  |  | 46,555 |  |  |  | 10 |
UZS3 |  |  | — |  |  |  | — |  |  |  | 39,531 |  |  |  | — |  |  |  | 136,787 |  |  |  | — |
RWF4 |  |  | — |  |  |  | — |  |  |  | 1,203 |  |  |  | — |  |  |  | 3,346 |  |  |  | — |
IDR5 |  |  | — |  |  |  | — |  |  |  | 15,646,011 |  |  |  | 53,142,167 |  |  |  | 14,886,393 |  |  |  | 710,162 |
MMK6 |  |  | — |  |  |  | — |  |  |  | 2,750 |  |  |  | — |  |  |  | 84 |  |  |  | — |
TZS7 |  |  | — |  |  |  | — |  |  |  | 29,987 |  |  |  | — |  |  |  | 317,348 |  |  |  | — |
BWP8 |  |  | — |  |  |  | — |  |  |  | 15 |  |  |  | — |  |  |  | 42 |  |  |  | — |
HKD |  |  | 9 |  |  |  | — |  |  |  | 254 |  |  |  | — |  |  |  | — |  |  |  | — |
BDT9 |  |  | 6 |  |  |  | — |  |  |  | 69,473 |  |  |  | — |  |  |  | 38,074 |  |  |  | — |
PLN10 |  |  | 207,273 |  |  |  | — |  |  |  | 106,025 |  |  |  | — |  |  |  | 338 |  |  |  | — |
VND11 |  |  | 270,000 |  |  |  | — |  |  |  | 515,412 |  |  |  | — |  |  |  | 311,649 |  |  |  | — |
CHF12 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 12 |
| 1 | Special Drawing Rights.
| 2 | Algeria Dinar.
| 3 | Uzbekistan Sum.
| 4 | Rwanda Franc.
| 5 | Indonesia Rupiah.
| 6 | Myanmar Kyat.
| 7 | Tanzanian Shilling.
| 8 | Botswana Pula.
| 9 | Bangladesh Taka.
| 10 | Polish Zloty.
| 11 | Vietnam Dong.
| 12 | Confoederatio Helvetia Franc.
Equity price risk [Member] |
Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity | As of December 31, 2015, 2016 and 2017, the Group is exposed to equity securities price risk because the securities held by the Group are traded in active markets. If the market prices had increased/decreased by 10% with all other variables held constant, the effects on profit before income tax and shareholders’ equity would have been as follows:
(In millions of Korean won) |  | Fluctuation of price |  | Income before tax |  |  | Equity |
2015.12.31 |  | 10% |  | ￦ | — |  |  | ￦ | 3,469 |
| -10% |  |  | — |  |  |  | (3,469 | )
2016.12.31 |  | 10% |  | ￦ | — |  |  | ￦ | 539 |
| -10% |  |  | — |  |  |  | (539 | )
2017.12.31 |  | 10% |  | ￦ | — |  |  | ￦ | 686 |
| -10% |  |  | — |  |  |  | (686 | )
Interest rate risk [Member] |
Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity | As of December 31, 2015, 2016 and 2017, if the market interest rate had increased/decreased by 100bp with other variables held constant, the effects on profit before income tax and shareholders’ equity would be as follows:
(In millions of Korean won) |  | Fluctuation of interest rate |  | Income before tax |  |  | Shareholders’ equity |
2015.12.31 |  | + 100 bp |  | ￦ | (3,601 | ) |  | ￦ | (245 | )
| - 100 bp |  |  | 3,615 |  |  |  | (5,764 | )
2016.12.31 |  | + 100 bp |  | ￦ | (3,456 | ) |  | ￦ | (1,673 | )
| - 100 bp |  |  | 3,445 |  |  |  | (5,025 | )
2017.12.31 |  | + 100 bp |  | ￦ | 1,942 |  |  | ￦ | 4,868 |
| - 100 bp |  |  | (1,954 | ) |  |  | (5,198 | )

X
- Definition The disclosure of the credit risk exposure. Credit risk exposure is the credit risk inherent in an entity’s financial assets and commitments to extend credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35M&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfCreditRiskExposureExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the reconciliation of the net amounts presented in the statement of financial position for financial assets that are offset or that are subject to an enforceable master netting arrangement or similar agreement, to the individual line item amounts presented in the statement of financial position. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph B46 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_B46&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfReconciliationOfFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsToIndividualLineItemsInStatementOfFinancialPositionExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the reconciliation of the net amounts presented in the statement of financial position for financial liabilities that are offset or that are subject to an enforceable master netting arrangement or similar agreement, to the individual line item amounts presented in the statement of financial position. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph B46 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_B46&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfReconciliationOfFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsToIndividualLineItemsInStatementOfFinancialPositionExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a maturity analysis for derivative financial liabilities, including the remaining contractual maturities for those derivative financial liabilities for which contractual maturities are essential for an understanding of the timing of the cash flows. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 39 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_39_b&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the sensitivity analysis for types of market risk to which the entity is exposed, showing how profit or loss and equity would have been affected by changes in the relevant risk variable that were reasonably possible at that date. [Refer: Market risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 40 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_40_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of debt equity ratio. + References No definition available. + Details
Name: | kt_DisclosureOfDebtEquityRatioExplanatory
Namespace Prefix: | kt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of detail information about gearing ratio. + References No definition available. + Details
Name: | kt_DisclosureOfDetailInformationAboutGearingRatioExplanatory
Namespace Prefix: | kt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of financial assets and financial liabilities. + References No definition available. + Details
Name: | kt_DisclosureOfFinancialAssetsAndFinancialLiabilitiesExplanatory
Namespace Prefix: | kt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of maturity analysis for non-derivative and derivative financial liabilities. + References No definition available. + Details
Name: | kt_DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilitiesExplanatory
Namespace Prefix: | kt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_EquityPriceRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |