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17. PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about property, plant and equipment [abstract]

17.

PROPERTY, PLANT AND EQUIPMENT

	2020							2019
	Historical cost		Accumulated depreciation			Net value		Historical cost		Accumulated depreciation			Net value
In service
Land		247		(23	)		224		248		(19	)		229
Reservoirs, dams and watercourses		3,300		(2,280	)		1,020		3,280		(2,200	)		1,080
Buildings, works and improvements		1,100		(836	)		264		1,092		(818	)		274
Machinery and equipment		2,647		(1,930	)		717		2,598		(1,869	)		729
Vehicles		21		(19	)		2		20		(18	)		2
Furniture and utensils		14		(11	)		3		14		(11	)		3
		7,329		(5,099	)		2,230		7,252		(4,935	)		2,317

In progress		177		—			177		133		—			133
Net property, plant and equipment		7,506		(5,099	)		2,407		7,385		(4,935	)		2,450

Changes in PP&E are as follows:

	2019		Additions		Disposals (3)			Depreciation			Transfers / capitalizations (2)			2020
In service
Land (1)		229		—		(1	)		(4	)		—			224
Reservoirs, dams and watercourses		1,080		—		—			(80	)		20			1,020
Buildings, works and improvements		274		—		—			(18	)		8			264
Machinery and equipment		729		20		(2	)		(79	)		49			717
Vehicles		2		—		—			—			—			2
Furniture and utensils		3		—		—			—			—			3
		2,317		20		(3	)		(181	)		77			2,230
In progress		133		112		11			—			(79	)		177
Net property, plant and equipment		2,450		132		8			(181	)		(2	)		2,407

(1)

Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.

(2)

Balances of R$2 were transferred to Intangible assets from PP&E.

(3)

Includes the impairment loss recognized for assets in progress.

	2018		Additions		Disposals			Depreciation			Transfers / capitalizations (2)			2019
In service
Land (1)		215		—		—			(3	)		17			229
Reservoirs, dams and watercourses		1,150		—		(4	)		(80	)		14			1,080
Buildings, works and improvements		314		—		(5	)		(19	)		(16	)		274
Machinery and equipment		854		—		(81	)		(78	)		34			729
Vehicles		5		—		—			(3	)		—			2
Furniture and utensils		4		—		(1	)		—			—			3
		2,542				(91	)		(183	)		49			2,317
In progress		120		70		(12	)		—			(45	)		133
Net property, plant and equipment		2,662		70		(103	)		(183	)		4			2,450

(1)

Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.

(2)

Balances of R$4 were transferred between Intangible assets, concession contract assets and PP&E.

	2017		Additions		Disposals			Depreciation			Transfer to Held for sale			Adjustment for business combination		Transfers / capitalizations			2018
In service
Land (1)		211		—		—			(2	)		—			—		6			215
Reservoirs, dams and watercourses		1,234		—		(2	)		(82	)		—			—		—			1,150
Buildings, works and improvements		331		—		—			(19	)		—			—		2			314
Machinery and equipment		874		—		(9	)		(70	)		(256	)		296		19			854
Vehicles		3		—					(2	)		—			—		4			5
Furniture and utensils		3		—		—			—			—			—		1			4
		2,656		—		(11	)		(175	)		(256	)		296		32			2,542
In progress		106		77		(22	)										(41	)		120
Net property, plant and equipment		2,762		77		(33	)		(175	)		(256	)		296		(9	)		2,662

(1)

Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.

Depreciation rates, which take into consideration the expected useful life of the assets, are revised annually by Management and are as follows:

Generation	(%)		Administration	(%)
Reservoirs, dams and watercourses		2	Software		20
Buildings – Machine room		2	Vehicles		14.29
Buildings – Other		3.33	IT equipment in general		16.67
Generator		3.33	General equipment		6.25
Water turbine		2.5	Buildings – Other		3.33
Pressure tunnel		3.13
Command station, panel and cubicle		3.57
Floodgate		3.33

The average annual depreciation rate for the year 2020 is 3.14% (3.13% in 2019 and 3.72% in 2018). The segregation by activity is as follows:

Hydroelectric Generation				Wind Power Generation				Administration
	2.96	%			4.94	%			6,19	%

The Company has not identified any evidence of impairment of its Property, plant and equipment assets. The generation concession contracts provide that at the end of each concession the grantor must determine the amount to be indemnified to the Company for the residual value. Management believes that the amounts ultimately received will be higher than the historical residual value.

The residual value of the assets is the residual balance of the assets at the end of the concession contract which will be transferred to the grantor at the end of the concession contract and for which Cemig is entitled to receive in cash. For contracts under which Cemig does not have a right to receive such amounts or there is uncertainty related to collection of the amounts, such as in the case of thermal generation and hydroelectric generation as an independent power producer, no residual value is recognized, and the depreciation rates are adjusted so that all the assets are depreciated within the concession term.

Consortium

The Company is a partner in an energy generation consortium for the Queimado plant, for which no separate company with independent legal existence was formed to manage the object of the concession. The Company’s portion in the consortium is recorded and controlled individually in the respective categories of PP&E and Intangible assets.

	Stake in power output (%)		Average annual depreciation rate (%)		2020			2019
In service
Usina de Queimado		82.50		3.93		218			217
Accumulated depreciation						(117	)		(109	)
Total						101			108

In progress
Usina de Queimado		82.50		—		2			1
Total						2			1