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PROPERTY, PLANT AND EQUIPMENT - Accumulated Depreciation (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
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 |
Balance, end of period | 16,443,742 | 19,351,891 | R$ 22,784,326
Accumulated depreciation |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | (24,649,708) | (27,153,803) | (21,503,745)
Depreciation, amortization and depletion | (1,807,355) | (2,217,820) | (2,310,568)
Disposals | 342,045 | 346,180 | 246,607
Loss of control by selling of subsidiary | 672,386 | 2,173,869 |
Assets held for sale | 2,510,269 |  |
Foreign exchange effect | (564,212) | 2,201,866 | (3,586,097)
Balance, end of period | (23,496,575) | (24,649,708) | (27,153,803)
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 | 6,455,083
Land and buildings | Accumulated depreciation |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | (3,898,671) | (4,387,719) | (3,618,197)
Depreciation, amortization and depletion | (343,373) | (334,365) | (323,824)
Transfers | (38,467) | (12,015) | 8,815
Disposals | 67,598 | 14,696 | 26,846
Loss of control by selling of subsidiary | 28,691 | 524,209 |
Assets held for sale | 370,727 |  |
Foreign exchange effect | (101,528) | 296,523 | (481,359)
Balance, end of period | (3,915,023) | (3,898,671) | (4,387,719)
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 | 11,201,682
Machines, equipment, and installations | Accumulated depreciation |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | (19,604,579) | (21,415,018) | (16,825,332)
Depreciation, amortization and depletion | (1,361,561) | (1,738,759) | (1,842,158)
Transfers | 25,886 | (2,368) | (9,071)
Disposals | 218,590 | 243,429 | 175,405
Loss of control by selling of subsidiary | 589,951 | 1,515,886 |
Assets held for sale | 1,989,917 |  |
Foreign exchange effect | (435,040) | 1,792,251 | (2,913,862)
Balance, end of period | (18,576,836) | (19,604,579) | (21,415,018)
Data electronic equipment |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | 112,432 | 111,646 |
Balance, end of period | 89,404 | 112,432 | 111,646
Data electronic equipment | Accumulated depreciation |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | (649,642) | (827,620) | (664,783)
Depreciation, amortization and depletion | (40,915) | (44,437) | (48,195)
Transfers | (400) | 968 | 360
Disposals | 12,790 | 56,466 | 15,512
Loss of control by selling of subsidiary | 12,627 | 95,809 |
Assets held for sale | 54,275 |  |
Foreign exchange effect | (10,969) | 69,172 | (130,514)
Balance, end of period | (622,234) | (649,642) | (827,620)
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 | 4,068,876
Other |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | 862,428 | 947,039 |
Balance, end of period | 793,215 | 862,428 | 947,039
Other | Accumulated depreciation |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Balance, beginning of period | (496,816) | (523,446) | (395,433)
Depreciation, amortization and depletion | (61,506) | (100,259) | (96,391)
Transfers | 12,981 | 13,415 | (104)
Disposals | 43,067 | 31,589 | 28,844
Loss of control by selling of subsidiary | 41,117 | 37,965 |
Assets held for sale | 95,350 |  |
Foreign exchange effect | (16,675) | 43,920 | (60,362)
Balance, end of period | R$ (382,482) | R$ (496,816) | R$ (523,446)

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