XML 163 R140.htm IDEA: XBRL DOCUMENT
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Property, plant and equipment (Details 1) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | $ 1,532,710,000 | $ 1,683,576,000
Changes |  |  |
Additions |  | 186,784,000 | 149,098,000
Disposals |  | (16,987,000) | (4,530,000)
Depreciation expense |  | (232,365,000) | (239,657,000)
Impairment |  | 0 | (31,582,000)
Increase (decrease) in foreign currency translation difference |  | 160,000 | 104,000
Reclassifications |  | (127,000) | 0
Other increases (decreases) | [1] | (32,515,000) | (22,243,000)
Decreases for classification as held for sale | [2] | (467,000) | (2,056)
Total changes |  | (95,517,000) | (150,866,000)
Closing balance |  | 1,437,193,000 | 1,532,710,000
Land [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 32,702,000 | 34,589,000
Changes |  |  |
Additions |  | 0 | 0
Disposals |  | 0 | 0
Depreciation expense |  | 0 | 0
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 45,000 | 28,000
Reclassifications |  | 0 | 0
Other increases (decreases) | [1] | 403,000 | (24,000)
Decreases for classification as held for sale | [2] | (411,000) | (1,891)
Total changes |  | 37,000 | (1,887,000)
Closing balance |  | 32,739,000 | 32,702,000
Buildings [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 237,585,000 | 254,032,000
Changes |  |  |
Additions |  | 189,000 | 0
Disposals |  | (1,000) | 0
Depreciation expense |  | (33,306,000) | (33,470,000)
Impairment |  | 0 | (338,000)
Increase (decrease) in foreign currency translation difference |  | 68,000 | (12,000)
Reclassifications |  | 23,274,000 | 17,373,000
Other increases (decreases) | [1] | 2,566,000 | 0
Decreases for classification as held for sale | [2] | (56,000) | 0
Total changes |  | (7,266,000) | (16,447,000)
Closing balance |  | 230,319,000 | 237,585,000
Other property, plant and equipment [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 26,417,000 | 52,231,000
Changes |  |  |
Additions |  | 541,000 | 545,000
Disposals |  | (1,000) | (753,000)
Depreciation expense |  | (6,759,000) | (7,288,000)
Impairment |  | 0 | (23,861,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 51,000
Reclassifications |  | 8,293,000 | 5,809,000
Other increases (decreases) | [1] | (3,629,000) | (152,000)
Decreases for classification as held for sale | [2] | 0 | (165,000)
Total changes |  | (1,555,000) | (25,814,000)
Closing balance |  | 24,862,000 | 26,417,000
Power generating assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 8,191,000 | 11,247,000
Changes |  |  |
Additions |  | 122,000 | 0
Disposals |  | 0 | 0
Depreciation expense |  | (2,184,000) | (2,374,000)
Impairment |  | 0 | (915,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 1,735,000 | 233,000
Other increases (decreases) | [1] | (3,000) | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (330,000) | (3,056,000)
Closing balance |  | 7,861,000 | 8,191,000
Transport equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 3,355,000 | 3,815,000
Changes |  |  |
Additions |  | 0 | 49,000
Disposals |  | (9,000) | 0
Depreciation expense |  | (730,000) | (683,000)
Impairment |  | 0 | (81,000)
Increase (decrease) in foreign currency translation difference |  | (1,000) | (6,000)
Reclassifications |  | 664,000 | 277,000
Other increases (decreases) | [1] | (22,000) | (16,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (98,000) | (460,000)
Closing balance |  | 3,257,000 | 3,355,000
Supplies and accessoies [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 1,773,000 | 4,007,000
Changes |  |  |
Additions |  | 115,000 | 0
Disposals |  | 0 | 0
Depreciation expense |  | (1,047,000) | (2,265,000)
Impairment |  | 0 | (379,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 934,000 | 410,000
Other increases (decreases) | [1] | 97,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 99,000 | (2,234,000)
Closing balance |  | 1,872,000 | 1,773,000
Equipment Office [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 3,642,000 | 3,465,000
Changes |  |  |
Additions |  | 42,000 | 753,000
Disposals |  | (20,000) | (1,000)
Depreciation expense |  | (357,000) | (845,000)
Impairment |  | 0 | (1,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 24,000
Reclassifications |  | 103,000 | 51,000
Other increases (decreases) | [1] | (2,923,000) | 196,000
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (3,155,000) | 177,000
Closing balance |  | 487,000 | 3,642,000
Network infrastructure [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 366,000 | 962,000
Changes |  |  |
Additions |  | 899,000 | 0
Disposals |  | (32,000) | 0
Depreciation expense |  | (909,000) | (1,179,000)
Impairment |  | 0 | (1,000)
Increase (decrease) in foreign currency translation difference |  | (13,000) | 0
Reclassifications |  | 76,000 | 584,000
Other increases (decreases) | [1] | 3,014,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 3,035,000 | (596,000)
Closing balance |  | 3,401,000 | 366,000
Network and communication equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 1,686,000 | 2,282,000
Changes |  |  |
Additions |  | 12,000 | 0
Disposals |  | 0 | 0
Depreciation expense |  | (665,000) | (774,000)
Impairment |  | 0 | (21,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 98,000 | 199,000
Other increases (decreases) | [1] | (81,000) | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (636,000) | (596,000)
Closing balance |  | 1,050,000 | 1,686,000
Mining assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 24,643,000 | 35,447,000
Changes |  |  |
Additions |  | 0 | 0
Disposals |  | 1,000 | 0
Depreciation expense |  | (10,638,000) | (11,837,000)
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 596,000 | 1,033,000
Other increases (decreases) | [1] | 1,635,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (8,406,000) | (10,804,000)
Closing balance |  | 16,237,000 | 24,643,000
Construction in Progress [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 170,710,000 | 151,831,000
Changes |  |  |
Additions |  | 158,797,000 | 145,605,000
Disposals |  | (16,761,000) | (3,370,000)
Depreciation expense |  | 0 | 0
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 1,000 | 0
Reclassifications |  | (120,668,000) | (101,104,000)
Other increases (decreases) | [1] | (27,025,000) | (22,252,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (5,656,000) | 18,879,000
Closing balance |  | 165,054,000 | 170,710,000
Machinery, plant and equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 1,021,640,000 | 1,129,668,000
Changes |  |  |
Additions |  | 26,067,000 | 2,146,000
Disposals |  | (164,000) | (406,000)
Depreciation expense |  | (175,770,000) | (178,942,000)
Impairment |  | 0 | (5,985,000)
Increase (decrease) in foreign currency translation difference |  | 60,000 | 19,000
Reclassifications |  | 84,768,000 | 75,135,000
Other increases (decreases) | [1] | (6,547,000) | 5,000
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (71,586,000) | (108,028,000)
Closing balance |  | 950,054,000 | 1,021,640,000
Gross carrying amount [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 4,140,841,000 | 4,023,272,000
Changes |  |  |
Additions |  | 186,784,000 | 149,098,000
Disposals |  | (62,300,000) | (10,857,000)
Increase (decrease) in foreign currency translation difference |  | 269,000 | 173,000
Reclassifications |  | (191,000) | 5,852,000
Other increases (decreases) | [1] | (31,898,000) | (24,612,000)
Decreases for classification as held for sale | [2] | (467,000) | (2,085,000)
Total changes |  | 92,197,000 | 117,569,000
Closing balance |  | 4,233,038,000 | 4,140,841,000
Gross carrying amount [member] | Land [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 32,702,000 | 34,589,000
Changes |  |  |
Additions |  | 0 | 0
Disposals |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 45,000 | 28,000
Reclassifications |  | 0 | 0
Other increases (decreases) | [1] | 403,000 | (24,000)
Decreases for classification as held for sale | [2] | (411,000) | (1,891)
Total changes |  | 37,000 | (1,887,000)
Closing balance |  | 32,739,000 | 32,702,000
Gross carrying amount [member] | Buildings [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 582,082,000 | 564,708,000
Changes |  |  |
Additions |  | 189,000 | 0
Disposals |  | (59,000) | 0
Increase (decrease) in foreign currency translation difference |  | 103,000 | 1,000
Reclassifications |  | 23,336,000 | 17,373,000
Other increases (decreases) | [1] | 4,669,000 | 0
Decreases for classification as held for sale | [2] | (56,000) | 0
Total changes |  | 28,182,000 | 17,374,000
Closing balance |  | 610,264,000 | 582,082,000
Gross carrying amount [member] | Other property, plant and equipment [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 253,555,000 | 248,493,000
Changes |  |  |
Additions |  | 541,000 | 545,000
Disposals |  | (11,623,000) | (753,000)
Increase (decrease) in foreign currency translation difference |  | 3,000 | 65,000
Reclassifications |  | 8,255,000 | 5,809,000
Other increases (decreases) | [1] | (5,900,000) | (410,000)
Decreases for classification as held for sale | [2] | 0 | (194,000)
Total changes |  | (8,724,000) | 5,062,000
Closing balance |  | 244,831,000 | 253,555,000
Gross carrying amount [member] | Power generating assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 34,812,000 | 34,579,000
Changes |  |  |
Additions |  | 122,000 | 0
Disposals |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 1,709,000 | 233,000
Other increases (decreases) | [1] | 0 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 1,831,000 | 233,000
Closing balance |  | 36,643,000 | 34,812,000
Gross carrying amount [member] | Transport equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 10,819,000 | 16,170,000
Changes |  |  |
Additions |  | 0 | 49,000
Disposals |  | (321,000) | (5,540,000)
Increase (decrease) in foreign currency translation difference |  | 1,000 | 8,000
Reclassifications |  | 696,000 | 277,000
Other increases (decreases) | [1] | 0 | (145,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 376,000 | (5,351,000)
Closing balance |  | 11,195,000 | 10,819,000
Gross carrying amount [member] | Supplies and accessoies [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 18,259,000 | 17,877,000
Changes |  |  |
Additions |  | 115,000 | 0
Disposals |  | 0 | (28,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 1,044,000 | 410,000
Other increases (decreases) | [1] | 80,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 1,239,000 | 382,000
Closing balance |  | 19,498,000 | 18,259,000
Gross carrying amount [member] | Equipment Office [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 17,731,000 | 18,858,000
Changes |  |  |
Additions |  | 42,000 | 753,000
Disposals |  | (23,000) | (1,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 52,000
Reclassifications |  | 172,000 | 51,000
Other increases (decreases) | [1] | (6,817,000) | (1,982,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (6,626,000) | (1,127,000)
Closing balance |  | 11,105,000 | 17,731,000
Gross carrying amount [member] | Network infrastructure [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 20,316,000 | 19,732,000
Changes |  |  |
Additions |  | 899,000 | 0
Disposals |  | (57,000) | 0
Increase (decrease) in foreign currency translation difference |  | (2,000) | 0
Reclassifications |  | 122,000 | 584,000
Other increases (decreases) | [1] | 5,760,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 6,722,000 | 584,000
Closing balance |  | 27,038,000 | 20,316,000
Gross carrying amount [member] | Network and communication equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 7,522,000 | 7,323,000
Changes |  |  |
Additions |  | 12,000 | 0
Disposals |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 123,000 | 199,000
Other increases (decreases) | [1] | (301,000) | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (166,000) | 199,000
Closing balance |  | 7,356,000 | 7,522,000
Gross carrying amount [member] | Mining assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 158,514,000 | 157,481,000
Changes |  |  |
Additions |  | 0 | 0
Disposals |  | (30,082,000) | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 596,000 | 1,033,000
Other increases (decreases) | [1] | 0 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (29,486,000) | 1,033,000
Closing balance |  | 129,028,000 | 158,514,000
Gross carrying amount [member] | Construction in Progress [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 170,710,000 | 151,831,000
Changes |  |  |
Additions |  | 158,797,000 | 145,605,000
Disposals |  | (16,761,000) | (3,370,000)
Increase (decrease) in foreign currency translation difference |  | 1,000 | 0
Reclassifications |  | (120,668,000) | (101,104,000)
Other increases (decreases) | [1] | (27,025,000) | (22,252,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (5,656,000) | 18,879,000
Closing balance |  | 165,054,000 | 170,710,000
Gross carrying amount [member] | Machinery, plant and equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 2,833,819,000 | 2,751,631,000
Changes |  |  |
Additions |  | 26,067,000 | 2,146,000
Disposals |  | (3,374,000) | (1,165,000)
Increase (decrease) in foreign currency translation difference |  | 118,000 | 19,000
Reclassifications |  | 84,424,000 | 80,987,000
Other increases (decreases) | [1] | (2,767,000) | 201,000
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 104,468,000 | 82,188,000
Closing balance |  | 2,938,287,000 | 2,833,819,000
Accumulated depreciation and amortisation [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (2,608,131,000) | (2,339,696,000)
Changes |  |  |
Disposals |  | 45,313,000 | 6,327,000
Depreciation expense |  | (232,365,000) | (239,657,000)
Impairment |  | 0 | (31,582,000)
Increase (decrease) in foreign currency translation difference |  | (109,000) | (69,000)
Reclassifications |  | 64,000 | (5,852,000)
Other increases (decreases) | [1] | (616,000) | 2,369,000
Decreases for classification as held for sale | [2] | (1,000) | 29,000
Total changes |  | (187,714,000) | (268,435,000)
Closing balance |  | 2,795,845,000 | (2,608,131,000)
Accumulated depreciation and amortisation [member] | Land [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 0 | 0
Changes |  |  |
Disposals |  | 0 | 0
Depreciation expense |  | 0 | 0
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 0 | 0
Other increases (decreases) | [1] | 0 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 0 | 0
Closing balance |  | 0 | 0
Accumulated depreciation and amortisation [member] | Buildings [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (344,497,000) | (310,676,000)
Changes |  |  |
Disposals |  | 58,000 | 0
Depreciation expense |  | (33,306,000) | (33,470,000)
Impairment |  | 0 | (338,000)
Increase (decrease) in foreign currency translation difference |  | (35,000) | (13,000)
Reclassifications |  | (62,000) | 0
Other increases (decreases) | [1] | (2,102,000) | 0
Decreases for classification as held for sale | [2] | (1,000) | 0
Total changes |  | (35,448,000) | (33,821,000)
Closing balance |  | (379,945,000) | (344,497,000)
Accumulated depreciation and amortisation [member] | Other property, plant and equipment [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (227,138,000) | (196,262,000)
Changes |  |  |
Disposals |  | 11,622,000 | 0
Depreciation expense |  | (6,759,000) | (7,288,000)
Impairment |  | 0 | (23,861,000)
Increase (decrease) in foreign currency translation difference |  | (3,000) | (14,000)
Reclassifications |  | 38,000 | 0
Other increases (decreases) | [1] | 2,271,000 | 258,000
Decreases for classification as held for sale | [2] | 0 | 29,000
Total changes |  | 7,169,000 | (30,876,000)
Closing balance |  | (219,969,000) | (227,138,000)
Accumulated depreciation and amortisation [member] | Power generating assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (26,621,000) | (23,332,000)
Changes |  |  |
Disposals |  | 0 | 0
Depreciation expense |  | (2,184,000) | (2,374,000)
Impairment |  | 0 | (915,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 26,000 | 0
Other increases (decreases) | [1] | (3,000) | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (2,161,000) | (3,289,000)
Closing balance |  | (28,782,000) | (26,621,000)
Accumulated depreciation and amortisation [member] | Transport equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (7,464,000) | (12,355,000)
Changes |  |  |
Disposals |  | 312,000 | 5,540,000
Depreciation expense |  | (730,000) | (683,000)
Impairment |  | 0 | (81,000)
Increase (decrease) in foreign currency translation difference |  | (2,000) | (14,000)
Reclassifications |  | (32,000) | 0
Other increases (decreases) | [1] | (22,000) | 129,000
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (474,000) | 4,891,000
Closing balance |  | (7,938,000) | (7,464,000)
Accumulated depreciation and amortisation [member] | Supplies and accessoies [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (16,486,000) | (13,870,000)
Changes |  |  |
Disposals |  | 0 | 28,000
Depreciation expense |  | (1,047,000) | (2,265,000)
Impairment |  | 0 | (379,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | (110,000) | 0
Other increases (decreases) | [1] | 17,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (1,140,000) | (2,616,000)
Closing balance |  | (17,626,000) | (16,486,000)
Accumulated depreciation and amortisation [member] | Equipment Office [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (14,089,000) | (15,393,000)
Changes |  |  |
Disposals |  | 3,000 | 0
Depreciation expense |  | (357,000) | (845,000)
Impairment |  | 0 | (1,000)
Increase (decrease) in foreign currency translation difference |  | 0 | (28,000)
Reclassifications |  | (69,000) | 0
Other increases (decreases) | [1] | 3,894,000 | 2,178,000
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 3,471,000 | 1,304,000
Closing balance |  | (10,618,000) | (14,089,000)
Accumulated depreciation and amortisation [member] | Network infrastructure [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (19,950,000) | (18,770,000)
Changes |  |  |
Disposals |  | 25,000 | 0
Depreciation expense |  | (909,000) | (1,179,000)
Impairment |  | 0 | (1,000)
Increase (decrease) in foreign currency translation difference |  | (11,000) | 0
Reclassifications |  | (46,000) | 0
Other increases (decreases) | [1] | (2,746,000) | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (3,687,000) | (1,180,000)
Closing balance |  | (23,637,000) | (19,950,000)
Accumulated depreciation and amortisation [member] | Network and communication equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (5,836,000) | (5,041,000)
Changes |  |  |
Disposals |  | 0 | 0
Depreciation expense |  | (665,000) | (774,000)
Impairment |  | 0 | (21,000)
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | (25,000) | 0
Other increases (decreases) | [1] | 220,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (470,000) | (795,000)
Closing balance |  | (6,306,000) | (5,836,000)
Accumulated depreciation and amortisation [member] | Mining assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (133,871,000) | (122,034,000)
Changes |  |  |
Disposals |  | 30,083,000 | 0
Depreciation expense |  | (10,638,000) | (11,837,000)
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 0 | 0
Other increases (decreases) | [1] | 1,635,000 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 21,080,000 | (11,837,000)
Closing balance |  | (112,791,000) | (133,871,000)
Accumulated depreciation and amortisation [member] | Construction in Progress [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | 0 | 0
Changes |  |  |
Disposals |  | 0 | 0
Depreciation expense |  | 0 | 0
Impairment |  | 0 | 0
Increase (decrease) in foreign currency translation difference |  | 0 | 0
Reclassifications |  | 0 | 0
Other increases (decreases) | [1] | 0 | 0
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | 0 | 0
Closing balance |  | 0 | 0
Accumulated depreciation and amortisation [member] | Machinery, plant and equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Opening balance |  | (1,812,179,000) | (1,621,963,000)
Changes |  |  |
Disposals |  | 3,210,000 | 759,000
Depreciation expense |  | (175,770,000) | (178,942,000)
Impairment |  | 0 | (5,985,000)
Increase (decrease) in foreign currency translation difference |  | (58,000) | 0
Reclassifications |  | 344,000 | (5,852,000)
Other increases (decreases) | [1] | (3,780,000) | (196,000)
Decreases for classification as held for sale | [2] | 0 | 0
Total changes |  | (176,054,000) | (190,216,000)
Closing balance |  | $ (1,988,233,000) | $ (1,812,179,000)
[1] | The net balance of other increases (decreases) corresponds to all those items that are reclassified to or from property, plant and equipment. They can have the following origin:1) work in progress which is expensed to profit or loss, forming part of operating costs or other expenses per function, as appropriate, 2) the variation representing the purchase and use of materials and spare parts, 3) projects corresponding mainly to exploration expenditures and ground studies that are reclassified to the item other non-current financial assets, 4) Software that is reclassified to Intangibles.
[2] | Any property, plant and equipment (disposal group) that, at the closing date of the financial statements, is subject to a commitment for sale or where the sales process has been initiated and where the sale is expected to occur within twelve months of that date, is classified by the Company as non-current assets held for sale.

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