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v3.21.1

Consolidated Statements of Cash Flows - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities |  |  |
Cash generated from operations | ₩ 4,745,293 | ₩ 4,058,065 | ₩ 4,212,222
Interest paid | (254,852) | (255,908) | (304,428)
Interest received | 259,836 | 276,349 | 242,951
Dividends received | 19,623 | 18,922 | 14,074
Income tax paid | (30,073) | (352,255) | (154,355)
Net cash inflow from operating activities | 4,739,827 | 3,745,173 | 4,010,464
Cash flows from investing activities |  |  |
Collection of loans | 63,435 | 63,517 | 64,023
Loans granted | (48,731) | (65,138) | (60,229)
Disposal of financial assets at fair value through profit or loss | 528,655 | 720,148 | 397,224
Disposal of financial assets at amortized cost | 528,746 | 422,637 | 255,290
Disposal of financial assets at fair value through other comprehensive income | 351,065 |  | 2,474
Disposal of assets held-for-sale | 83,241 | 28,834 | 9,842
Disposal of investments in associates and joint ventures | 24 | 16,930 | 7,832
Acquisition of investments in associates and joint ventures | (273,411) | (29,980) | (34,420)
Disposal of property and equipment, and investment properties | 49,832 | 42,554 | 90,992
Acquisition of property and equipment, and investment properties | (3,207,566) | (3,263,338) | (2,260,879)
Acquisition of financial assets at fair value through profit or loss | (521,142) | (793,977) | (158,787)
Acquisition of financial assets at amortized cost | (759,180) | (501,838) | (248,789)
Acquisition of financial assets at fair value through other comprehensive income | (14,092) | (14,277) | (16,239)
Disposal of intangible assets | 13,362 | 12,097 | 20,037
Disposal of right-of-use assets | 2,023 | 9,393 |
Discontinued operations | 205 | 1,977 |
Acquisition of right-of-use assets | (5,824) | (6,236) |
Acquisition of intangible assets | (511,094) | (530,775) | (746,213)
Decrease in cash due to business combination, etc. | (41,018) |  | (26,288)
Net cash outflow from investing activities | (3,761,470) | (3,887,472) | (2,704,130)
Cash flows from financing activities |  |  |
Proceeds from borrowings and debentures | 1,795,221 | 1,951,568 | 1,473,016
Repayments of borrowings and debentures | (1,627,354) | (1,377,394) | (1,612,731)
Settlement of derivative assets and liabilities, net | 36,594 | 23,901 | (3,461)
Cash outflow from consolidated capital transactions | (1,192) | (122,918) | (5,506)
Cash inflow from other financing activities | 35,854 | 65,698 | 13,939
Dividends paid to shareholders | (310,567) | (305,159) | (298,632)
Acquisition of treasury stock | (114,683) |  | (24,415)
Decrease in finance leases liabilities | (447,784) | (485,444) | (73,885)
Decrease in other liabilities | (13,674) |  |
Net cash outflow from financing activities | (647,585) | (249,748) | (531,675)
Effect of exchange rate change on cash and cash equivalents | (2,042) | (5,481) | 581
Net increase (decrease) in cash and cash equivalents | 328,730 | (397,528) | 775,240
Cash and cash equivalents at beginning of year | 2,305,894 | 2,703,422 | 1,928,182
Cash and cash equivalents at end of year | ₩ 2,634,624 | ₩ 2,305,894 | ₩ 2,703,422

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- Definition Proceeds from disposal of financial assets at amortized cost. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from disposal of financial assets at fair value through other comprehensive income. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from Disposal of Financial Assets at Fair Value Through Profit or Loss + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from disposal of noncurrent assets or disposal groups classified as discontinued operations + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from disposal of right of use assets. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from payments for settlement of derivative assets and liabilities. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Purchase of financial assets at amortized cost. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchase of financial assets at fair value through other comprehensive income. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchase of financial assets at fair value through profit or loss. + References No definition available. + Details
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Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchase of right of use assets.. + References No definition available. + Details
Name: | kt_PurchaseOfRightOfUseAssets
Namespace Prefix: | kt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration