XML 139 R137.htm IDEA: XBRL DOCUMENT v3.20.1
17 Property, Plant and Equipment (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost R$ 19,010,184 R$ 18,825,986
Accumulated depreciation (8,418,081) (7,985,323)
Property, plant and equipment, ending 10,592,103 10,840,663
In Service [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 18,437,598 14,233,899
Accumulated depreciation (8,418,081) (7,985,323)
Property, plant and equipment, ending 10,019,517 6,248,576
In Service [Member] | Reservoirs, Dams and Aqueducts [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 8,082,238 6,643,087
Accumulated depreciation (4,405,546) (4,216,613)
Property, plant and equipment, ending 3,676,692 2,426,474
In Service [Member] | Machinery and Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 8,875,458 5,648,292
Accumulated depreciation (2,871,568) (2,674,150)
Property, plant and equipment, ending 6,003,890 2,974,142
In Service [Member] | Buildings [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 1,962,033 1,500,990
Accumulated depreciation (1,054,009) (1,021,783)
Property, plant and equipment, ending 908,024 479,207
In Service [Member] | Land [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 490,071 375,286
Accumulated depreciation (27,651) (18,184)
Property, plant and equipment, ending 462,420 357,102
In Service [Member] | Vehicles and Aircraft [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 47,960 47,744
Accumulated depreciation 44,876 (41,978)
Property, plant and equipment, ending 3,084 5,766
In Service [Member] | Furniture And Tools [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 22,415 22,057
Accumulated depreciation (14,466) (12,642)
Property, plant and equipment, ending 7,949 9,415
In Service [Member] | Provision For Impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (1,042,499) (3,489)
Accumulated depreciation
Property, plant and equipment, ending (1,042,499) (3,489)
In Service [Member] | Special Obligations [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (78) (68)
Accumulated depreciation 35 27
Property, plant and equipment, ending (43) (41)
In Progress [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 572,586 4,592,087
Accumulated depreciation
Property, plant and equipment, ending 572,586 4,592,087
In Progress [Member] | Provision For Impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost (127,586) (1,197,693)
Accumulated depreciation
Property, plant and equipment, ending (127,586) (1,197,693)
In Progress [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, cost 700,172 5,789,780
Accumulated depreciation
Property, plant and equipment, ending R$ 700,172 R$ 5,789,780