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Deferred Income Tax and income Tax Expense (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block [abstract] |
Summary of Analysis of Deferred Tax Assets and Deferred Tax Liabilities | The analysis of deferred tax assets and deferred tax liabilities as at December 31, 2017 and 2018, is as follows:
(In millions of Korean won) |  | December 31, 2017 |  |  | December 31, 2018 |
Deferred tax assets |  |  |  |  |  |  |  |
Deferred tax assets to be recovered within 12 months |  | ￦ | 318,339 |  |  | ￦ | 428,690 |
Deferred tax assets to be recovered after more than 12 months |  |  | 1,140,252 |  |  |  | 1,347,985 |
Deferred tax assets before offsetting |  |  | 1,458,591 |  |  |  | 1,776,675 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Deferred tax liability to be recovered within 12 months |  |  | (15,705 | ) |  |  | (413,409 | )
Deferred tax liability to be recovered after more than 12 months |  |  | (859,126 | ) |  |  | (1,102,682 | )
Deferred tax liabilities before offsetting |  |  | (874,831 | ) |  |  | (1,516,091 | )
Deferred tax assets after offsetting |  | ￦ | 712,222 |  |  | ￦ | 465,369 |
Deferred tax liabilities after offsetting |  | ￦ | 128,462 |  |  | ￦ | 204,785 |
Summary of Gross Movements on the Deferred Income Tax Account | The gross movements on the deferred income tax account for the years ended December 31, 2017 and 2018, are calculated as follows:
(In millions of Korean won) |  | 2017 |  |  | 2018 |
Beginning |  | ￦ | 563,729 |  |  | ￦ | 583,760 |
Changes in accounting policy |  |  | — |  |  |  | (374,307 | )
Credited to the statement of profit or loss |  |  | (1,771 | ) |  |  | 15,016 |
Charged to other comprehensive income |  |  | 21,802 |  |  |  | 36,115 |
Ending |  | ￦ | 583,760 |  |  | ￦ | 260,584 |
Summary of Movement in Deferred Income Tax Assets and Liabilities | The movement in deferred income tax assets and liabilities during the year, without taking into consideration the offsetting of balances within the same tax jurisdiction, is as follows:
(In millions of Korean won) |  | 2017 |
|  | Beginning |  |  | Statement of profit or loss |  |  | Other comprehensive income |  |  | Ending |
Deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments |  | ￦ | (49,188 | ) |  | ￦ | 49,188 |  |  | ￦ | — |  |  | ￦ | — |
Available-for-sale financial assets |  |  | (31,702 | ) |  |  | (164 | ) |  |  | 1,346 |  |  |  | (30,520 | )
Investment in subsidiaries, associates, and joint ventures |  |  | (50,746 | ) |  |  | (42,659 | ) |  |  | (3,245 | ) |  |  | (96,650 | )
Depreciation |  |  | (39,498 | ) |  |  | 39,498 |  |  |  | — |  |  |  | — |
Advanced depreciation provision |  |  | (225,687 | ) |  |  | (22,905 | ) |  |  | — |  |  |  | (248,592 | )
Deposits for severance benefits |  |  | (307,730 | ) |  |  | (80,126 | ) |  |  | — |  |  |  | (387,856 | )
Accrued income |  |  | (2,024 | ) |  |  | (126 | ) |  |  | — |  |  |  | (2,150 | )
Reserve for technology and human resource development |  |  | (747 | ) |  |  | 433 |  |  |  | — |  |  |  | (314 | )
Others |  |  | (119,366 | ) |  |  | 10,617 |  |  |  | — |  |  |  | (108,749 | )
Total |  | ￦ | (826,688 | ) |  | ￦ | (46,244 | ) |  | ￦ | (1,899 | ) |  | ￦ | (874,831 | )
Deferred tax assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments |  | ￦ | — |  |  | ￦ | 34,572 |  |  | ￦ | (9,848 | ) |  | ￦ | 24,724 |
Provision for impairment or trade receivables |  |  | 110,276 |  |  |  | 11,380 |  |  |  | — |  |  |  | 121,656 |
Inventory valuation |  |  | 48 |  |  |  | (48 | ) |  |  | — |  |  |  | — |
Contribution for construction |  |  | 18,091 |  |  |  | 180 |  |  |  | — |  |  |  | 18,271 |
Accrued expenses |  |  | 80,356 |  |  |  | 10,683 |  |  |  | — |  |  |  | 91,039 |
Provisions |  |  | 20,221 |  |  |  | 3,858 |  |  |  | — |  |  |  | 24,079 |
Property and equipment |  |  | 232,915 |  |  |  | (841 | ) |  |  | — |  |  |  | 232,074 |
Defined benefit liabilities |  |  | 372,492 |  |  |  | 67,751 |  |  |  | 26,806 |  |  |  | 467,049 |
Withholding of facilities expenses |  |  | 6,910 |  |  |  | 472 |  |  |  | — |  |  |  | 7,382 |
Accrued payroll expenses |  |  | 25,915 |  |  |  | (10,786 | ) |  |  | — |  |  |  | 15,129 |
Deduction of installment receivables |  |  | 13,887 |  |  |  | (13,887 | ) |  |  | — |  |  |  | — |
Assets retirement obligation |  |  | 18,086 |  |  |  | 2,750 |  |  |  | — |  |  |  | 20,836 |
Gain or loss foreign currency translation |  |  | 67,701 |  |  |  | (67,558 | ) |  |  | — |  |  |  | 143 |
Deferred revenue |  |  | 26,113 |  |  |  | 221 |  |  |  | — |  |  |  | 26,334 |
Real-estate sales |  |  | 3,851 |  |  |  | 4,847 |  |  |  | — |  |  |  | 8,698 |
Tax credit carryforwards |  |  | 199,599 |  |  |  | (48,823 | ) |  |  | — |  |  |  | 150,776 |
Tax loss carryforward |  |  | — |  |  |  | 2,699 |  |  |  | — |  |  |  | 2,699 |
Others |  |  | 193,956 |  |  |  | 47,003 |  |  |  | 6,743 |  |  |  | 247,702 |
Total |  | ￦ | 1,390,417 |  |  | ￦ | 44,473 |  |  | ￦ | 23,701 |  |  | ￦ | 1,458,591 |
Net balance |  | ￦ | 563,729 |  |  | ￦ | (1,771 | ) |  | ￦ | 21,802 |  |  | ￦ | 583,760 |
(In millions of Korean won) |  | 2018 |
|  | Beginning |  |  | Changes in accounting policy |  |  | Statement of profit or loss |  |  | Other comprehensive income |  |  | Ending |
Deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale financial assets |  | ￦ | (30,520 | ) |  | ￦ | 30,520 |  |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | — |
Investment in subsidiaries, associates, and joint ventures |  |  | (96,650 | ) |  |  | — |  |  |  | 2,867 |  |  |  | 179 |  |  |  | (93,604 | )
Depreciation |  |  | — |  |  |  | — |  |  |  | (424 | ) |  |  | — |  |  |  | (424 | )
Advanced depreciation provision |  |  | (248,592 | ) |  |  | — |  |  |  | (64,592 | ) |  |  | — |  |  |  | (313,184 | )
Deposits for severance benefits |  |  | (387,856 | ) |  |  | — |  |  |  | (11,126 | ) |  |  | — |  |  |  | (398,982 | )
Accrued income |  |  | (2,150 | ) |  |  | — |  |  |  | 592 |  |  |  | — |  |  |  | (1,558 | )
Reserve for technology and human resource development |  |  | (314 | ) |  |  | — |  |  |  | 110 |  |  |  | — |  |  |  | (204 | )
Prepaid expenses |  |  | — |  |  |  | (352,139 | ) |  |  | (17,777 | ) |  |  | — |  |  |  | (369,916 | )
Contract assets |  |  | — |  |  |  | (23,663 | ) |  |  | 12,158 |  |  |  | — |  |  |  | (11,505 | )
Financial assets at fair value through profit or loss |  |  | — |  |  |  | (30,856 | ) |  |  | 30,195 |  |  |  | — |  |  |  | (661 | )
Financial assets at fair value through other comprehensive income |  |  | — |  |  |  | (8,587 | ) |  |  | (17,638 | ) |  |  | (15,573 | ) |  |  | (41,798 | )
Others |  |  | (108,749 | ) |  |  | — |  |  |  | (175,506 | ) |  |  | — |  |  |  | (284,255 | )
Total |  | ￦ | (874,831 | ) |  | ￦ | (384,725 | ) |  | ￦ | (241,141 | ) |  | ￦ | (15,394 | ) |  | ￦ | (1,516,091 | )
Deferred tax assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments |  | ￦ | 24,724 |  |  | ￦ | — |  |  | ￦ | (26,128 | ) |  | ￦ | 9,745 |  |  | ￦ | 8,341 |
Provision for impairment or trade receivables |  |  | 121,656 |  |  |  | (9,096 | ) |  |  | (12,673 | ) |  |  | — |  |  |  | 99,887 |
Inventory valuation |  |  | — |  |  |  | — |  |  |  | 121 |  |  |  | — |  |  |  | 121 |
Contribution for construction |  |  | 18,271 |  |  |  | — |  |  |  | (1,471 | ) |  |  | — |  |  |  | 16,800 |
Unsettled expenses |  |  | 106,168 |  |  |  | — |  |  |  | 21,729 |  |  |  | — |  |  |  | 127,897 |
Provisions |  |  | 24,079 |  |  |  | — |  |  |  | 12,099 |  |  |  | — |  |  |  | 36,178 |
Property and equipment |  |  | 232,074 |  |  |  | — |  |  |  | (1,796 | ) |  |  | — |  |  |  | 230,278 |
Defined benefit liabilities |  |  | 467,049 |  |  |  | — |  |  |  | 3,980 |  |  |  | 42,813 |  |  |  | 513,842 |
Withholding of facilities expenses |  |  | 7,382 |  |  |  | — |  |  |  | (773 | ) |  |  | — |  |  |  | 6,609 |
Deduction of installment receivables |  |  | — |  |  |  | — |  |  |  | 42 |  |  |  | — |  |  |  | 42 |
Assets retirement obligation |  |  | 20,836 |  |  |  | — |  |  |  | 3,696 |  |  |  | — |  |  |  | 24,532 |
Gain or loss foreign currency translation |  |  | 143 |  |  |  | — |  |  |  | 10,529 |  |  |  | — |  |  |  | 10,672 |
Deferred revenue |  |  | 26,334 |  |  |  | 15,809 |  |  |  | (2,502 | ) |  |  | — |  |  |  | 39,641 |
Real-estate sales |  |  | 8,698 |  |  |  | 661 |  |  |  | 12,369 |  |  |  | — |  |  |  | 21,728 |
Tax loss carryforward |  |  | 2,699 |  |  |  | — |  |  |  | 1,364 |  |  |  | — |  |  |  | 4,063 |
Trade receivables |  |  | — |  |  |  | 2,890 |  |  |  | (1,293 | ) |  |  | — |  |  |  | 1,597 |
Others |  |  | 247,702 |  |  |  | 154 |  |  |  | 284,742 |  |  |  | (1,049 | ) |  |  | 531,549 |
Total |  | ￦ | 1,307,815 |  |  | ￦ | 10,418 |  |  | ￦ | 304,035 |  |  | ￦ | 51,509 |  |  | ￦ | 1,673,777 |
Temporary difference, net |  |  | 432,984 |  |  |  | (374,307 | ) |  |  | 62,894 |  |  |  | 36,115 |  |  |  | 157,686 |
Tax credit carryforwards |  |  | 150,776 |  |  |  | — |  |  |  | (47,878 | ) |  |  | — |  |  |  | 102,898 |
Total net balance |  | ￦ | 583,760 |  |  | ￦ | (374,307 | ) |  | ￦ | 15,016 |  |  | ￦ | 36,115 |  |  | ￦ | 260,584 |
Summary of Tax Impacts Recognized Directly To Equity | The tax impacts recognized directly to equity as at December 31, 2016, 2017, and 2018, are as follows:
|  | 2016 |  |  | 2017 |  |  | 2018 |
(In millions of Korean won) |  | Before recognition |  |  | Tax effect |  |  | After recognition |  |  | Before recognition |  |  | Tax effect |  |  | After recognition |  |  | Before recognition |  |  | Tax effect |  |  | After recognition |
Loss on valuation of available-for-sale securities |  | ￦ | 9,347 |  |  | ￦ | (2,262 | ) |  | ￦ | 7,085 |  |  | ￦ | (5,561 | ) |  | ￦ | 1,346 |  |  | ￦ | (4,215 | ) |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | — |
Gain on valuation of financial assets at fair value through other comprehensive income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 59,384 |  |  |  | (15,573 | ) |  |  | 43,811 |
Gain (loss) on valuation of hedge instruments |  |  | (14,611 | ) |  |  | 3,536 |  |  |  | (11,075 | ) |  |  | 40,694 |  |  |  | (9,848 | ) |  |  | 30,846 |  |  |  | (36,756 | ) |  |  | 9,745 |  |  |  | (27,011 | )
Remeasurements of net defined benefit liabilities |  |  | 5,558 |  |  |  | (1,345 | ) |  |  | 4,213 |  |  |  | (110,768 | ) |  |  | 26,806 |  |  |  | (83,962 | ) |  |  | (116,324 | ) |  |  | 42,813 |  |  |  | (73,511 | )
Share of gain(loss) of associates and joint ventures, and others |  |  | (641 | ) |  |  | 155 |  |  |  | (486 | ) |  |  | 13,410 |  |  |  | (3,245 | ) |  |  | 10,165 |  |  |  | (1,036 | ) |  |  | 179 |  |  |  | (857 | )
Exchange differences on translation for foreign operations |  |  | (7,133 | ) |  |  | 1,726 |  |  |  | (5,407 | ) |  |  | (27,865 | ) |  |  | 6,743 |  |  |  | (21,122 | ) |  |  | 3,989 |  |  |  | (1,049 | ) |  |  | 2,940 |
Total |  | ￦ | (7,480 | ) |  | ￦ | 1,810 |  |  | ￦ | (5,670 | ) |  | ￦ | (90,090 | ) |  | ￦ | 21,802 |  |  | ￦ | (68,288 | ) |  | ￦ | (90,743 | ) |  | ￦ | 36,115 |  |  | ￦ | (54,628 | )
Summary of Details of Income Tax Expense | Details of income tax expense for the years ended December 31, 2016, 2017 and 2018, are calculated as follows:
(In millions of Korean won) |  | 2016 |  |  | 2017 |  |  | 2018 |
Current income tax expense |  | ￦ | 182,088 |  |  | ￦ | 268,885 |  |  | ￦ | 329,581 |
Impact of change in deferred taxes |  |  | 152,102 |  |  |  | 1,771 |  |  |  | (15,016 | )
Income tax expense |  | ￦ | 334,910 |  |  | ￦ | 270,656 |  |  | ￦ | 314,565 |
Summary of Tax on the Group's Profit Before Tax | The tax on the Group’s profit before tax differs from the theoretical amount that would arise using the weighted average tax rate applicable to profits of the entities as follows:
(In millions of Korean won) |  | 2016 |  |  | 2017 |  |  | 2018 |
Profit before income tax expense |  | ￦ | 1,166,755 |  |  | ￦ | 816,997 |  |  | ￦ | 1,033,977 |
Statutory income tax expense |  | ￦ | 282,355 |  |  | ￦ | 197,251 |  |  | ￦ | 273,982 |
Tax effect |  |  |  |  |  |  |  |  |  |  |  |
Income not taxable for taxation purposes |  |  | (28,093 | ) |  |  | (19,268 | ) |  |  | (85,322 | )
Non-deductible expenses |  |  | 21,947 |  |  |  | 39,746 |  |  |  | 18,126 |
Tax credit |  |  | (13,764 | ) |  |  | (27,211 | ) |  |  | (20,319 | )
Additional payment of income taxes |  |  | (4,780 | ) |  |  | 976 |  |  |  | 11,439 |
Tax effect and adjustment on consolidation |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  | 31,847 |  |  |  | 20,475 |  |  |  | 137 |
Eliminated dividend income form subsidiaries |  |  | 40,087 |  |  |  | 34,305 |  |  |  | 31,966 |
Changes of out-side tax effect |  |  | (567 | ) |  |  | 17,990 |  |  |  | 618 |
Investment in-kind |  |  | — |  |  |  | — |  |  |  | 82,820 |
Others |  |  | 5,878 |  |  |  | 6,392 |  |  |  | 1,118 |
Income tax expense |  | ￦ | 334,910 |  |  | ￦ | 270,656 |  |  | ￦ | 314,565 |

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