Customers, Traders and Power Transport Concession Holders (Tables)

12 Months Ended

Dec. 31, 2018


	Balances not yet due			Up to 90 days past due			More than 91 up to 360 days past due			More than 361 days past due			Dec. 31, 2018			Dec. 31, 2017
Billed supply		1,345			759			393			492			2,989			2,687
Unbilled supply		1,048			—			—			—			1,048			994
Other concession holders – wholesale supply		7			36			2			2			47			26
Other concession holders – wholesale supply, unbilled		282			—			—			—			282			283
CCEE (Wholesale Trading Exchange)		1			158			—			7			166			382
Concession Holders – power transport		76			15			3			86			180			159
Concession Holders – power transport, unbilled		212			—			—			—			212			177
(–) Provision for doubtful receivables		(179	)		(21	)		(20	)		(531	)		(751	)		(568	)

		2,792			947			378			56			4,173			4,140

Current assets														4,092			3,885
Non-current assets														81			255

Summary of Provision for Allowance for Doubtful Accounts

The allowance for doubtful accounts is considered to be sufficient to cover any potential losses in the realization of accounts receivable, and the breakdown by type of customers is as follows:


	2018		2017
Residential		137		160
Industrial		172		178
Commercial, services and others		189		117
Rural		33		17
Public authorities		119		12
Public lighting		6		5
Public services		27		10
Charges for use of the network (TUSD)		68		68
Others		—		1

		751		568

Summary of Changes in Provision for Doubtful Accounts

Changes in the allowance for doubtful accounts in 2018, 2017 and 2016 are as follows:



Balance at December 31, 2015	625
Additions, net	382
Disposals	(347	)

Balance at December 31, 2016	660
Additions, net	248
Disposals	(340	)

Balance at December 31, 2017	568
Effect of adoption of IFRS 9 on Jan. 1, 2018 (1) (Note 2.4)	150
Additions, net (Note 29 d)	264
Disposals	(231	)

Balance at December 31, 2018	751

(1)

Recognized directly to Equity, without inclusion in Statement of income

Summary of Advances from Customers

The Company receives advance payments for the sale of energy from certain customers. Advance payments related to services not yet provided are as follows:


Balance at Dec. 31, 2016	181
Additions	325
Disposals	(318	)
Inflation adjustment (Note 30)	45

Balance at Dec. 31, 2017	233
Additions	50
Disposals	(215	)
Inflation adjustment (Note 30)	11

Balance at Dec. 31, 2018	79

Summary of Terms of Advances from Clients

Advance payments are adjusted until the actual delivery of the energy supply under the following terms:


2018					2018		2017
Counterparty	Specified period for billing	Index for adjusting prepaid amounts	GWh deliverable		2018		2017
BTG Pactual	—	1.20 to 1.57% a.m.		—		—		44
Deal Comercializadora	—	1.2% a.m.		—		—		1
White Martins Gases Industriais Ltda.	January to March of 2019	124% do CDI		72		40		146
White Martins Gases Industriais Ltda. ⁽¹⁾	January to March of 2019	124% do CDI		—		—		42
Ferroligas	January to June of 2019	136% do CDI		—		39		—

						79		233

(1)	Contracts signed with Cemig D, relating to the billing of Contract for Use of the Distribution System (CUSD), containing the components: transportation and other charges.