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v3.20.1

Property, Plant and Equipment (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | ₩ 152,743,194 |  | ₩ 150,882,414 |  |
Effect of change in accounting policy | 4,947,947 |  | 0 |  |
Acquisitions | 14,221,355 |  | 12,266,870 |  |
Disposals | (964,308) |  | (909,211) |  |
Depreciation | (10,966,756) |  | (9,904,933) |  |
Impairment | (50,036) | [1],[2] | (710,164) | [3] | ₩ (51,067)
Others | 4,770,431 | [4],[5] | 1,118,218 |  |
Ending balance | 164,701,827 |  | 152,743,194 |  | 150,882,414
Land |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 13,532,324 |  | 13,296,574 |  |
Effect of change in accounting policy | 684,386 |  |  |  |
Acquisitions | 8,717 |  |  |  |
Ending balance | 13,826,246 |  | 13,532,324 |  | 13,296,574
Land | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 13,554,292 |  | 13,318,542 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 40,752 |  | 2,254 |  |
Disposals | (29,205) |  | (18,240) |  |
Depreciation | 0 |  | 0 |  |
Impairment | (25,626) | [1],[2] | 0 | [3] |
Others | 307,850 | [4],[5] | 251,736 |  |
Ending balance | 13,848,063 |  | 13,554,292 |  | 13,318,542
Land | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 13,554,292 |  | 13,318,542 |  |
Ending balance | 13,848,063 |  | 13,554,292 |  | 13,318,542
Land | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (21,968) |  | (21,968) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 0 |  | 0 |  |
Disposals | 151 |  | 0 |  |
Depreciation | 0 |  | 0 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | 0 | [4],[5] | 0 |  |
Ending balance | (21,817) |  | (21,968) |  | (21,968)
Buildings |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 11,870,502 |  | 11,870,502 |  |
Effect of change in accounting policy | 36,874 |  |  |  |
Acquisitions | 18,106 |  |  |  |
Ending balance | 12,383,786 |  | 11,870,502 |  | 11,870,502
Buildings | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 11,933,691 |  | 12,053,526 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 3,195 |  | 10,156 |  |
Disposals | (23,409) |  | (8,545) |  |
Depreciation | (821,680) |  | (767,845) |  |
Impairment | (1,293) | [1],[2] | (1,896) | [3] |
Others | 1,355,202 | [4],[5] | 648,295 |  |
Ending balance | 12,445,706 |  | 11,933,691 |  | 12,053,526
Buildings | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 19,431,536 |  | 18,777,678 |  |
Ending balance | 20,756,351 |  | 19,431,536 |  | 18,777,678
Buildings | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (7,494,176) |  | (6,722,376) |  |
Ending balance | (8,305,683) |  | (7,494,176) |  | (6,722,376)
Buildings | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (3,669) |  | (1,776) |  |
Ending balance | (4,962) |  | (3,669) |  | (1,776)
Buildings | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (63,189) |  | (63,539) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | (592) |  | (4,213) |  |
Disposals | 0 |  | 31 |  |
Depreciation | 6,214 |  | 6,836 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | (4,353) | [4],[5] | (2,304) |  |
Ending balance | (61,920) |  | (63,189) |  | (63,539)
Structures |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 42,520,941 |  | 43,908,364 |  |
Effect of change in accounting policy | 20,840 |  |  |  |
Acquisitions | 7,358 |  |  |  |
Ending balance | 44,992,316 |  | 42,520,941 |  | 43,908,364
Structures | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 42,711,795 |  | 44,104,778 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 1,663 |  | 11,123 |  |
Disposals | (470,230) |  | (587,278) |  |
Depreciation | (2,399,283) |  | (2,476,278) |  |
Impairment | (1,234) | [2] | (360) | [3] |
Others | 5,336,159 | [4],[5] | 1,659,810 |  |
Ending balance | 45,178,870 |  | 42,711,795 |  | 44,104,778
Structures | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 66,335,506 |  | 66,184,484 |  |
Ending balance | 70,900,343 |  | 66,335,506 |  | 66,184,484
Structures | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (23,615,312) |  | (22,071,667) |  |
Ending balance | (25,711,840) |  | (23,615,312) |  | (22,071,667)
Structures | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (8,339) |  | (8,039) |  |
Ending balance | (9,633) |  | (8,339) |  | (8,039)
Structures | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (190,854) |  | (196,414) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 0 |  | 0 |  |
Disposals | 2,405 |  | 3,270 |  |
Depreciation | 9,373 |  | 10,292 |  |
Impairment | 0 | [2] | 0 | [3] |
Others | (7,478) | [4],[5] | (8,002) |  |
Ending balance | (186,554) |  | (190,854) |  | (196,414)
Machinery |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 47,283,353 |  | 46,692,610 |  |
Effect of change in accounting policy | 0 |  |  |  |
Acquisitions | 1,308 |  |  |  |
Ending balance | 49,748,393 |  | 47,283,353 |  | 46,692,610
Machinery | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 47,456,595 | [6] | 46,875,798 |  |
Effect of change in accounting policy | 0 |  | 0 | [6] |
Acquisitions | 326,606 |  | 460,676 | [6] |
Disposals | (248,951) |  | (250,159) | [6] |
Depreciation | (5,452,669) |  | (4,973,252) | [6] |
Impairment | (12,247) | [2] | (393,839) | [3],[6] |
Others | 7,837,966 | [4],[5] | 5,737,371 | [6] |
Ending balance | 49,907,300 |  | 47,456,595 | [6] | 46,875,798
Machinery | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 82,047,823 |  | 75,826,292 |  |
Ending balance | 89,224,339 |  | 82,047,823 |  | 75,826,292
Machinery | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (34,151,878) |  | (28,904,982) |  |
Ending balance | (38,865,392) |  | (34,151,878) |  | (28,904,982)
Machinery | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (439,350) |  | (45,512) |  |
Ending balance | (451,647) |  | (439,350) |  | (45,512)
Machinery | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (173,242) |  | (183,188) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | (1,050) |  | (1,185) |  |
Disposals | 635 |  | 823 |  |
Depreciation | 17,993 |  | 18,099 |  |
Impairment | 0 | [2] | 0 | [3] |
Others | (3,243) | [4],[5] | (7,791) |  |
Ending balance | (158,907) |  | (173,242) |  | (183,188)
Ships |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 302 |  | 403 |  |
Effect of change in accounting policy | 3,986,947 |  |  |  |
Acquisitions | 126,807 |  |  |  |
Ending balance | 201 |  | 302 |  | 403
Ships | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 302 |  | 403 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 0 |  | 0 |  |
Disposals | 0 |  | 0 |  |
Depreciation | (100) |  | (103) |  |
Impairment | 0 | [2] | 0 | [3] |
Others | (1) | [5] | 2 |  |
Ending balance | 201 |  | 302 |  | 403
Ships | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 3,655 |  | 4,175 |  |
Ending balance | 3,104 |  | 3,655 |  | 4,175
Ships | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (3,353) |  | (3,772) |  |
Ending balance | (2,903) |  | (3,353) |  | (3,772)
Vehicles |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 67,969 |  | 74,716 |  |
Effect of change in accounting policy | 11,258 |  |  |  |
Acquisitions | 9,559 |  |  |  |
Ending balance | 68,310 |  | 67,969 |  | 74,716
Vehicles | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 72,189 |  | 81,038 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 3,789 |  | 2,774 |  |
Disposals | 4,558 |  | (402) |  |
Depreciation | (33,650) |  | (32,620) |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | 23,699 | [5] | 21,399 |  |
Ending balance | 70,585 |  | 72,189 |  | 81,038
Vehicles | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 287,954 |  | 276,425 |  |
Ending balance | 309,829 |  | 287,954 |  | 276,425
Vehicles | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (215,649) |  | (195,260) |  |
Ending balance | (239,128) |  | (215,649) |  | (195,260)
Vehicles | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (116) |  | (127) |  |
Ending balance | (116) |  | (116) |  | (127)
Vehicles | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (4,220) |  | (6,322) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | (228) |  | (45) |  |
Disposals | 5 |  | 0 |  |
Depreciation | 2,170 |  | 2,146 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | (2) | [5] | 1 |  |
Ending balance | (2,275) |  | (4,220) |  | (6,322)
Equipment |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 382,441 |  | 419,911 |  |
Ending balance | 373,874 |  | 382,441 |  | 419,911
Equipment | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 382,859 |  | 420,672 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 47,532 |  | 36,884 |  |
Disposals | (162) |  | (265) |  |
Depreciation | (199,376) |  | (187,821) |  |
Impairment | (227) | [1],[2] | (36) | [3] |
Others | 143,489 | [4],[5] | 113,425 |  |
Ending balance | 374,115 |  | 382,859 |  | 420,672
Equipment | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 1,558,309 |  | 1,440,870 |  |
Ending balance | 1,716,210 |  | 1,558,309 |  | 1,440,870
Equipment | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (1,175,408) |  | (1,020,192) |  |
Ending balance | (1,342,053) |  | (1,175,408) |  | (1,020,192)
Equipment | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (42) |  | (6) |  |
Ending balance | (42) |  | (42) |  | (6)
Equipment | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (418) |  | (761) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | (81) |  | (22) |  |
Disposals | 0 |  | 0 |  |
Depreciation | 262 |  | 365 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | (4) | [4],[5] | 0 |  |
Ending balance | (241) |  | (418) |  | (761)
Tools |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 192,000 |  | 199,636 |  |
Ending balance | 163,661 |  | 192,000 |  | 199,636
Tools | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 192,675 |  | 200,663 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 20,956 |  | 12,331 |  |
Disposals | (31) |  | (268) |  |
Depreciation | (87,708) |  | (83,283) |  |
Impairment | 0 | [1],[2] | (6) | [3] |
Others | 38,172 | [4],[5] | 63,238 |  |
Ending balance | 164,064 |  | 192,675 |  | 200,663
Tools | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 1,073,145 |  | 1,010,537 |  |
Ending balance | 1,098,127 |  | 1,073,145 |  | 1,010,537
Tools | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (880,432) |  | (809,842) |  |
Ending balance | (934,023) |  | (880,432) |  | (809,842)
Tools | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (38) |  | (32) |  |
Ending balance | (40) |  | (38) |  | (32)
Tools | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (675) |  | (1,027) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 0 |  | (44) |  |
Disposals | 0 |  | 0 |  |
Depreciation | 281 |  | 432 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | (9) | [4],[5] | (36) |  |
Ending balance | (403) |  | (675) |  | (1,027)
Construction in progress |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 28,766,427 |  | 25,523,457 |  |
Ending balance | 28,358,259 |  | 28,766,427 |  | 25,523,457
Construction in progress | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 28,821,167 |  | 25,572,541 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 13,544,091 |  | 11,749,397 |  |
Disposals | (199,853) |  | (47,463) |  |
Depreciation | 0 |  | 0 |  |
Impairment | (8,828) | [1],[2] | (167,603) | [3] |
Others | (13,737,107) | [4],[5] | (8,285,705) |  |
Ending balance | 28,419,470 |  | 28,821,167 |  | 25,572,541
Construction in progress | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 29,026,880 |  | 25,610,649 |  |
Ending balance | 28,584,806 |  | 29,026,880 |  | 25,610,649
Construction in progress | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (205,713) |  | (38,108) |  |
Ending balance | (165,336) |  | (205,713) |  | (38,108)
Construction in progress | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (54,740) |  | (49,084) |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 12,338 |  | (23,895) |  |
Disposals | 0 |  | 0 |  |
Depreciation | 0 |  | 0 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | (18,809) | [4],[5] | 18,239 |  |
Ending balance | (61,211) |  | (54,740) |  | (49,084)
Finance lease assets |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 195,704 |  | 297,652 |  |
Ending balance | 0 |  | 195,704 |  | 297,652
Finance lease assets | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 195,730 |  | 297,679 |  |
Effect of change in accounting policy | (195,730) |  | 0 |  |
Acquisitions | 0 |  | 0 |  |
Disposals | 0 |  | 0 |  |
Depreciation | 0 |  | (101,888) |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | 0 | [4],[5] | (61) |  |
Ending balance | 0 |  | 195,730 |  | 297,679
Finance lease assets | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 2,390,701 |  | 2,390,680 |  |
Ending balance | 0 |  | 2,390,701 |  | 2,390,680
Finance lease assets | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (2,194,971) |  | (2,093,001) |  |
Ending balance | 0 |  | (2,194,971) |  | (2,093,001)
Finance lease assets | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (26) |  | (27) |  |
Effect of change in accounting policy | 26 |  | 0 |  |
Acquisitions | 0 |  | 0 |  |
Disposals | 0 |  | 0 |  |
Depreciation | 0 |  | 1 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | 0 | [4],[5] | 0 |  |
Ending balance | 0 |  | (26) |  | (27)
Right-of-use assets |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 0 |  | 0 |  |
Ending balance | 4,783,573 |  | 0 |  | 0
Right-of-use assets | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 0 |  | 0 |  |
Effect of change in accounting policy | 5,143,651 |  | 0 |  |
Acquisitions | 220,996 |  | 0 |  |
Disposals | 0 |  | 0 |  |
Depreciation | (581,074) |  | 0 |  |
Impairment | 0 | [1],[2] | 0 | [3] |
Others | 0 | [4],[5] | 0 |  |
Ending balance | 4,783,573 |  | 0 |  | 0
Right-of-use assets | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 0 |  | 0 |  |
Ending balance | 7,574,010 |  | 0 |  | 0
Right-of-use assets | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 0 |  | 0 |  |
Ending balance | (2,790,437) |  | 0 |  | 0
Right-of-use assets | Government grants |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 0 |  | 0 |  |
Ending balance | 0 |  | 0 |  | 0
Retirements, property, plant and equipment |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 5,571,754 |  | 6,039,484 |  |
Ending balance | 7,374,527 |  | 5,571,754 |  | 6,039,484
Retirements, property, plant and equipment | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 5,571,754 |  | 6,039,484 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 0 |  | 1,988 |  |
Disposals | 0 |  | 0 |  |
Depreciation | (626,856) |  | (610,435) |  |
Impairment | 0 | [1],[2] | (146,424) | [3] |
Others | 2,429,629 | [4],[5] | 287,141 |  |
Ending balance | 7,374,527 |  | 5,571,754 |  | 6,039,484
Retirements, property, plant and equipment | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 9,424,181 |  | 9,395,821 |  |
Ending balance | 11,690,188 |  | 9,424,181 |  | 9,395,821
Retirements, property, plant and equipment | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (3,706,004) |  | (3,356,337) |  |
Ending balance | (4,169,238) |  | (3,706,004) |  | (3,356,337)
Retirements, property, plant and equipment | Accumulated impairment losses |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (146,423) |  | 0 |  |
Ending balance | (146,423) |  | (146,423) |  | 0
Other property, plant and equipment |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance |  |  | 2,439,620 |  |
Ending balance | 2,628,681 |  |  |  | 2,439,620
Other property, plant and equipment | Carrying Amount Other than Government Grants [Member] |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 2,359,477 |  | 2,439,620 |  |
Effect of change in accounting policy | 0 |  | 0 |  |
Acquisitions | 1,388 |  | 8,691 |  |
Disposals | (221) |  | (715) |  |
Depreciation | (800,653) |  | (709,579) |  |
Impairment | (581) | [1],[2] | 0 | [3] |
Others | 1,069,271 | [4],[5] | 621,460 |  |
Ending balance | 2,628,681 |  | 2,359,477 |  | 2,439,620
Other property, plant and equipment | Acquisition cost |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | 11,875,394 |  | 11,247,021 |  |
Ending balance | 12,955,782 |  | 11,875,394 |  | 11,247,021
Other property, plant and equipment | Accumulated depreciation |  |  |  |  |
Changes in property and equipment [Line Items] |  |  |  |  |
Beginning balance | (9,515,917) |  | (8,807,401) |  |
Ending balance | ₩ (10,327,101) |  | ₩ (9,515,917) |  | ₩ (8,807,401)
[1] | As described in Note 2, the Company recognized impairment loss of KRW3,819 million related to Wolsong unit 1, Shin-Hanul unit 3 and 4 and reversal of impairment loss of KRW16,693 million related to Wolsong unit 1.
[2] | KEPCO Bylong Australia Pty., Ltd., 100% owned subsidiary, performed an impairment test over its land and others. The Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss.
[3] | Korea Hydro & Nuclear Power Co., Ltd. And Korea Western Power Co., Ltd., 100% owned subsidiaries, have determined that there are impairment indicators for the shutdowns of certain power generation units and fire, and performed an impairment test over the individual assets. As a result, the Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss in the consolidated statements of comprehensive income.
[4] | 'Others' include immaterial amounts which have been reclassed from Construction-in-progress to other assets in the current period to reflect assets that had finished construction in the prior periods.
[5] | 'Others' include the amounts of assets acquired by the business combination. (see Note 51)
[6] | As described in Note 26, the amount of acquisition of machinery includes KRW204,787 million of that the Company believes the possibility of economic benefit outflow is probable on the request for additional construction costs of Hyundai E&C, GS Engineering & Construction Corp. and Hansol SeenTec Co., Ltd.

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