XML 155 R134.htm IDEA: XBRL DOCUMENT v3.21.1
17. PROPERTY, PLANT AND EQUIPMENT (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E R$ 2,407 R$ 2,450 [1] R$ 2,662 R$ 2,762
Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 2,230 2,317 2,542 2,656
Investment property under construction or sevelopment [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 177 133 120 106
Land [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 224 229 [2],[3] 215 [2] 211
Reservoirs, dams and watercourses [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 1,020 1,080 1,150 1,234
Buildings works and improvements [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 264 274 314 331
Machinery and equipment [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 717 729 854 874
Vehicles [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 2 2 5 3
Furniture and utensils [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 3 3 R$ 4 R$ 3
Historical cost [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 7,506 7,385    
Historical cost [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 7,329 7,252    
Historical cost [member] | Investment property under construction or sevelopment [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 177 133    
Historical cost [member] | Land [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 247 248    
Historical cost [member] | Reservoirs, dams and watercourses [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 3,300 3,280    
Historical cost [member] | Buildings works and improvements [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 1,100 1,092    
Historical cost [member] | Machinery and equipment [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 2,647 2,598    
Historical cost [member] | Vehicles [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 21 20    
Historical cost [member] | Furniture and utensils [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E 14 14    
Accumulated depreciation and amortisation [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (5,099) (4,935)    
Accumulated depreciation and amortisation [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (5,099) (4,935)    
Accumulated depreciation and amortisation [member] | Land [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (23) (19)    
Accumulated depreciation and amortisation [member] | Reservoirs, dams and watercourses [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (2,280) (2,200)    
Accumulated depreciation and amortisation [member] | Buildings works and improvements [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (836) (818)    
Accumulated depreciation and amortisation [member] | Machinery and equipment [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (1,930) (1,869)    
Accumulated depreciation and amortisation [member] | Vehicles [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E (19) (18)    
Accumulated depreciation and amortisation [member] | Furniture and utensils [member] | Investment property completed [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net PP&E R$ (11) R$ (11)    
[1] See note 2.8.
[2] Balances of R$4 were transferred between Intangible assets, concession contract assets and PP&E.
[3] Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.