XML 146 R130.htm IDEA: XBRL DOCUMENT v3.19.1
18. Property, Plant and Equipment (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost R$ 18,825,986 R$ 17,620,597
Accumulated depreciation (7,985,323) (7,791,147)
Property, plant and equipment, ending 10,840,663 9,829,450
In service    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 14,233,899 13,807,942
Accumulated depreciation (7,985,323) (7,791,147)
Property, plant and equipment, ending 6,248,577 6,016,795
In service | Reservoirs, dams and aqueducts    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 6,643,087 6,638,348
Accumulated depreciation (4,216,613) (4,071,621)
Property, plant and equipment, ending 2,426,474 2,566,727
In service | Machinery and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 5,648,292 5,320,736
Accumulated depreciation (2,674,150) (2,654,801)
Property, plant and equipment, ending 2,974,141 2,665,935
In service | Buildings    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 1,500,990 1,500,144
Accumulated depreciation (1,021,783) (989,221)
Property, plant and equipment, ending 479,208 510,923
In service | Land    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 375,286 277,665
Accumulated depreciation (18,184) (15,287)
Property, plant and equipment, ending 357,102 262,378
In service | Vehicles and aircraft    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 47,744 59,101
Accumulated depreciation (41,978) (48,759)
Property, plant and equipment, ending 5,766 10,342
In service | Furniture and tools    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 22,057 16,990
Accumulated depreciation (12,642) (11,476)
Property, plant and equipment, ending 9,416 5,514
In service | Provision for impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (3,489) (4,986)
Accumulated depreciation 0 0
Property, plant and equipment, ending (3,489) (4,986)
In service | Special Obligations    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (68) (56)
Accumulated depreciation 27 18
Property, plant and equipment, ending (41) (38)
In progress    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 4,592,087 3,812,655
Accumulated depreciation 0 0
Property, plant and equipment, ending 4,592,086 3,812,655
In progress | Provision for impairment    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (1,197,693) (1,210,358)
Accumulated depreciation 0 0
Property, plant and equipment, ending (1,197,693) (1,210,358)
In progress | Cost    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 5,789,780 5,023,013
Accumulated depreciation 0 0
Property, plant and equipment, ending R$ 5,789,779 R$ 5,023,013