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PROPERTY, PLANT AND EQUIPMENT - Cost (Details) - BRL (R$) R$ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | R$ 19,351,891 | R$ 22,784,326 |
Impairment | R$ (265,369) | R$ (239,329) | (265,369) | (239,329) |
Balance, end of period | 16,443,742 | 19,351,891 | 16,443,742 | 19,351,891 | R$ 22,784,326
Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 44,001,599 | 49,938,129 | 43,635,534
Additions |  |  | 873,329 | 1,323,891 | 2,324,718
Capitalized interest |  |  | 44,260 | 187,375 | 213,476
Business Combination |  |  |  |  | 54,600
Disposals |  |  | (513,472) | (461,340) | (366,607)
Loss of control by selling of subsidiary |  |  | (1,091,705) | (2,956,162) |
Impairment |  |  | (265,369) | (239,329) | (2,105,971)
Assets held for sale |  |  | (4,080,785) |  |
Foreign exchange effect |  |  | 972,460 | (3,790,965) | 6,182,379
Balance, end of period | 39,940,317 | 44,001,599 | 39,940,317 | 44,001,599 | 49,938,129
Land and buildings |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 5,585,082 | 6,455,083 |
Balance, end of period | 5,170,675 | 5,585,082 | 5,170,675 | 5,585,082 | 6,455,083
Land and buildings | Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 9,483,753 | 10,842,802 | 9,083,765
Additions |  |  | 2,028 | 35,238 | 2,150
Business Combination |  |  |  |  | 30,693
Transfers |  |  | 700,318 | 584,575 | 462,812
Disposals |  |  | (157,625) | (81,256) | (69,777)
Loss of control by selling of subsidiary |  |  | (119,928) | (1,011,492) |
Impairment |  |  | (10,063) | (52,071) | (60,952)
Assets held for sale |  |  | (1,013,466) |  |
Foreign exchange effect |  |  | 200,681 | (834,043) | 1,394,111
Balance, end of period | 9,085,698 | 9,483,753 | 9,085,698 | 9,483,753 | 10,842,802
Machines, equipment, and installations |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 11,029,301 | 11,201,682 |
Balance, end of period | 9,439,768 | 11,029,301 | 9,439,768 | 11,029,301 | 11,201,682
Machines, equipment, and installations | Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 30,633,880 | 32,616,700 | 28,434,074
Additions |  |  | 124,136 | 93,290 | 238,060
Business Combination |  |  |  |  | 10,767
Transfers |  |  | 716,685 | 2,665,898 | 1,475,130
Disposals |  |  | (232,771) | (271,104) | (142,936)
Loss of control by selling of subsidiary |  |  | (900,840) | (1,726,440) |
Impairment |  |  | (255,293) | (183,788) | (1,501,293)
Assets held for sale |  |  | (2,734,923) |  |
Foreign exchange effect |  |  | 665,730 | (2,560,676) | 4,102,898
Balance, end of period | 28,016,604 | 30,633,880 | 28,016,604 | 30,633,880 | 32,616,700
Data electronic equipment |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 112,432 | 111,646 |
Balance, end of period | 89,404 | 112,432 | 89,404 | 112,432 | 111,646
Data electronic equipment | Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 762,074 | 939,266 | 755,455
Additions |  |  | 1,770 | 2,126 | 8,194
Business Combination |  |  |  |  | 503
Transfers |  |  | 19,340 | 74,804 | 40,512
Disposals |  |  | (12,963) | (60,542) | (20,166)
Loss of control by selling of subsidiary |  |  | (16,426) | (112,319) |
Impairment |  |  |  | (228) |
Assets held for sale |  |  | (53,315) |  |
Foreign exchange effect |  |  | 11,158 | (81,033) | 154,768
Balance, end of period | 711,638 | 762,074 | 711,638 | 762,074 | 939,266
Property, plant and equipment under construction |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 1,762,648 | 4,068,876 |
Balance, end of period | 950,680 | 1,762,648 | 950,680 | 1,762,648 | 4,068,876
Property, plant and equipment under construction | Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 1,762,648 | 4,068,876 | 4,065,627
Additions |  |  | 687,019 | 1,117,317 | 2,000,515
Capitalized interest |  |  | 44,260 | 187,375 | 213,476
Business Combination |  |  |  |  | 1,784
Transfers |  |  | (1,440,183) | (3,314,746) | (1,999,840)
Disposals |  |  | (60,151) | (1,550) | (103,959)
Loss of control by selling of subsidiary |  |  | (1,382) | (53,630) |
Impairment |  |  |  |  | (543,726)
Assets held for sale |  |  | (107,677) |  |
Foreign exchange effect |  |  | 66,146 | (240,994) | 434,999
Balance, end of period | 950,680 | 1,762,648 | 950,680 | 1,762,648 | 4,068,876
Other |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 862,428 | 947,039 |
Balance, end of period | 793,215 | 862,428 | 793,215 | 862,428 | 947,039
Other | Gross |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |
Balance, beginning of period |  |  | 1,359,244 | 1,470,485 | 1,296,613
Additions |  |  | 58,376 | 75,920 | 75,799
Business Combination |  |  |  |  | 10,853
Transfers |  |  | 3,840 | (10,531) | 21,386
Disposals |  |  | (49,962) | (46,888) | (29,769)
Loss of control by selling of subsidiary |  |  | (53,129) | (52,281) |
Impairment |  |  | (13) | (3,242) |
Assets held for sale |  |  | (171,404) |  |
Foreign exchange effect |  |  | 28,745 | (74,219) | 95,603
Balance, end of period | R$ 1,175,697 | R$ 1,359,244 | R$ 1,175,697 | R$ 1,359,244 | R$ 1,470,485

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