XML 163 R148.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property, Plant and Equipment (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Changes in property and equipment [Line Items]      
Beginning balance ₩ 145,743,056    
Impairment 51,067   ₩ 30,344
Ending balance 150,882,414 ₩ 145,743,056  
Land [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 12,966,537 12,393,313  
Ending balance 13,296,574 12,966,537 12,393,313
Land [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 12,969,741 12,396,460  
Acquisitions 32,773 13,973  
Disposals (8,961) (52,569)  
Others 324,989 611,877  
Ending balance 13,318,542 12,969,741 12,396,460
Land [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 12,969,741 12,396,460  
Ending balance 13,318,542 12,969,741 12,396,460
Land [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (3,204) (3,147)  
Disposals 5 14  
Others (18,769) (71)  
Ending balance (21,968) (3,204) (3,147)
Buildings [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 11,723,436 9,612,500  
Ending balance 11,989,987 11,723,436 9,612,500
Buildings [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 11,784,624 9,676,432  
Acquisitions 40,592    
Disposals (19,715) (9,020)  
Depreciation (794,804) (676,866)  
Impairment [1] (923)    
Others 1,043,752 2,794,078  
Ending balance 12,053,526 11,784,624 9,676,432
Buildings [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 17,722,326 14,936,722  
Ending balance 18,777,678 17,722,326 14,936,722
Buildings [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (5,936,849) (5,259,436)  
Ending balance (6,722,376) (5,936,849) (5,259,436)
Buildings [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (853) (854)  
Ending balance (1,776) (853) (854)
Buildings [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (61,188) (63,932)  
Acquisitions (900)    
Disposals 28 731  
Depreciation 5,996 5,299  
Others (7,475) (3,286)  
Ending balance (63,539) (61,188) (63,932)
Structures [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 43,132,774 40,065,043  
Ending balance 43,908,364 43,132,774 40,065,043
Structures [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 43,330,415 40,258,162  
Acquisitions 428 455  
Disposals (519,366) (524,310)  
Depreciation (2,421,168) (2,233,333)  
Impairment [1] (6,856)    
Others 3,721,325 5,829,441  
Ending balance 44,104,778 43,330,415 40,258,162
Structures [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 63,291,437 58,251,296  
Ending balance 66,184,484 63,291,437 58,251,296
Structures [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (19,959,839) (17,991,950)  
Ending balance (22,071,667) (19,959,839) (17,991,950)
Structures [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (1,183) (1,184)  
Ending balance (8,039) (1,183) (1,184)
Structures [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (197,641) (193,119)  
Disposals 1,905 2,597  
Depreciation 10,011 9,491  
Others (10,689) (16,610)  
Ending balance (196,414) (197,641) (193,119)
Machinery [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 43,310,881 36,755,814  
Ending balance 46,692,610 43,310,881 36,755,814
Machinery [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 43,421,945 36,864,749  
Acquisitions 421,892 193,017  
Disposals (242,428) (243,757)  
Depreciation (4,821,595) (4,353,596)  
Impairment [1] (43,121)    
Others 8,139,105 10,961,532  
Ending balance 46,875,798 43,421,945 36,864,749
Machinery [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 67,769,168 57,143,211  
Ending balance 75,826,292 67,769,168 57,143,211
Machinery [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (24,344,832) (20,242,232)  
Ending balance (28,904,982) (24,344,832) (20,242,232)
Machinery [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (2,391) (36,230)  
Ending balance (45,512) (2,391) (36,230)
Machinery [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (111,064) (108,935)  
Acquisitions (10,834) (33)  
Disposals 489 1,210  
Depreciation 17,390 12,272  
Others (79,169) (15,578)  
Ending balance (183,188) (111,064) (108,935)
Ships [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 550 786  
Ending balance 403 550 786
Ships [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 550 786  
Depreciation (147) (281)  
Others   45  
Ending balance 403 550 786
Ships [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 4,175 4,930  
Ending balance 4,175 4,175 4,930
Ships [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (3,625) (4,144)  
Ending balance (3,772) (3,625) (4,144)
Vehicles [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 70,863 60,443  
Ending balance 74,716 70,863 60,443
Vehicles [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 70,970 60,472  
Acquisitions 3,447 2,493  
Disposals (174) (34)  
Depreciation (34,236) (27,615)  
Impairment [1] (127)    
Others 41,158 35,654  
Ending balance 81,038 70,970 60,472
Vehicles [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 247,751 227,733  
Ending balance 276,425 247,751 227,733
Vehicles [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (176,781) (167,261)  
Ending balance (195,260) (176,781) (167,261)
Vehicles [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Ending balance (127)    
Vehicles [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (107) (29)  
Acquisitions (107) (58)  
Disposals 14    
Depreciation 1,070 25  
Others (7,192) (45)  
Ending balance (6,322) (107) (29)
Equipment [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 375,663 309,545  
Ending balance 419,911 375,663 309,545
Equipment [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 376,395 310,571  
Acquisitions 53,529 67,134  
Disposals (413) (323)  
Depreciation (158,614) (128,084)  
Impairment [1] (6)    
Others 149,781 127,097  
Ending balance 420,672 376,395 310,571
Equipment [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 1,270,660 1,134,376  
Ending balance 1,440,870 1,270,660 1,134,376
Equipment [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (894,265) (823,805)  
Ending balance (1,020,192) (894,265) (823,805)
Equipment [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Ending balance (6)    
Equipment [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (732) (1,026)  
Acquisitions (43)    
Depreciation 454 452  
Others (440) (158)  
Ending balance (761) (732) (1,026)
Tools [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 178,602 159,939  
Ending balance 199,636 178,602 159,939
Tools [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 179,032 160,630  
Acquisitions 30,990 27,856  
Disposals (166) (327)  
Depreciation (74,909) (69,842)  
Impairment [1] (32)    
Others 65,748 60,715  
Ending balance 200,663 179,032 160,630
Tools [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 921,115 836,131  
Ending balance 1,010,537 921,115 836,131
Tools [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (742,083) (675,501)  
Ending balance (809,842) (742,083) (675,501)
Tools [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Ending balance (32)    
Tools [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (430) (691)  
Depreciation 354 295  
Others (951) (34)  
Ending balance (1,027) (430) (691)
Construction in progress [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 27,160,453 35,127,128  
Ending balance 25,523,457 27,160,453 35,127,128
Construction in progress [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 27,296,260 35,267,026  
Acquisitions 11,996,508 11,752,352  
Disposals (6,487) (94,443)  
Others (13,713,740) (19,628,675)  
Ending balance 25,572,541 27,296,260 35,267,026
Construction in progress [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 27,334,368 35,305,133  
Ending balance 25,610,649 27,334,368 35,305,133
Construction in progress [Member] | Accumulated impairment losses [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (38,108) (38,107)  
Ending balance (38,108) (38,108) (38,107)
Construction in progress [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (135,807) (139,898)  
Acquisitions (42,728) (28,434)  
Others 129,451 32,525  
Ending balance (49,084) (135,807) (139,898)
Finance lease assets [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 406,353 511,509  
Ending balance 297,652 406,353 511,509
Finance lease assets [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 406,353 511,509  
Acquisitions   34  
Disposals (29,696) (31)  
Depreciation (107,390) (96,254)  
Others 28,412 (8,905)  
Ending balance 297,679 406,353 511,509
Finance lease assets [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 2,390,779 2,389,985  
Ending balance 2,390,680 2,390,779 2,389,985
Finance lease assets [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (1,984,426) (1,878,476)  
Ending balance (2,093,001) (1,984,426) (1,878,476)
Finance lease assets [Member] | Government grants [Member]      
Changes in property and equipment [Line Items]      
Depreciation 1    
Others (28)    
Ending balance (27)    
Retirements, property, plant and equipment [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 4,065,412 4,106,087  
Ending balance 6,039,484 4,065,412 4,106,087
Retirements, property, plant and equipment [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 4,065,412 4,106,087  
Depreciation (518,565) (509,310)  
Others 2,492,637 468,635  
Ending balance 6,039,484 4,065,412 4,106,087
Retirements, property, plant and equipment [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 7,129,771 6,888,547  
Ending balance 9,395,821 7,129,771 6,888,547
Retirements, property, plant and equipment [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (3,064,359) (2,782,460)  
Ending balance (3,356,337) (3,064,359) (2,782,460)
Other property, plant and equipment [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 2,351,532 2,259,244  
Ending balance 2,439,620 2,351,532 2,259,244
Other property, plant and equipment [Member] | Carrying Amount Other than Government Grants [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 2,351,532 2,259,244  
Acquisitions 10,411    
Disposals (28) (9)  
Depreciation (762,711) (813,248)  
Others 840,416 905,545  
Ending balance 2,439,620 2,351,532 2,259,244
Other property, plant and equipment [Member] | Acquisition cost [Member]      
Changes in property and equipment [Line Items]      
Beginning balance 10,361,294 9,438,381  
Ending balance 11,247,021 10,361,294 9,438,381
Other property, plant and equipment [Member] | Accumulated depreciation [Member]      
Changes in property and equipment [Line Items]      
Beginning balance (8,009,762) (7,179,137)  
Ending balance ₩ (8,807,401) ₩ (8,009,762) ₩ (7,179,137)
[1] Korea Midland 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 impairment loss in the consolidated statements of comprehensive income.