Trade Accounts Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2020

As of December 31, this account comprises:


	Total				Current				Non-current
	2019		2020		2019		2020		2019		2020
Receivables, net (a)		959,151		753,693		415,970		254,587		543,181		499,106
Unbilled receivables, net - Subsidiaries (b)		499,974		413,364		387,998		337,244		111,976		76,120
Unbilled receivables, net - Concessions (c)		234,688		266,776		110,236		111,336		124,452		155,440

	1,693,813		1,433,833		914,204		703,167		779,609		730,666

Schedule of Current and Non-Current Unbilled Receivables

The unbilled receivables by subsidiaries are documents related to the estimates of the degree of progress for services rendered that were not billed, as follows:


	2019		2020
Cumbra Peru S.A.		384,660		315,878
Concar S.A.C.		10,737		6,298
Cumbra Ingenieria S.A.		24,787		25,823
UNNA ENERGIA S.A.		1,657		1,512
Adexus S.A.		78,133		63,853

		499,974		413,364

Below are the unbilled receivables by the subsidiaries grouped by the main projects:


	2019		2020
Infrastructure
Operation and maintenance of roads		9,837		4,167
Oil services		1,657		1,512
Others		901		2,131

		12,395		7,810

Engineering and Construction
Talara Refinery		190,831		70,329
Project Quellaveco		52,488		84,014
Project Mina Justa		26,658		1,743
Civil works, assembly and electromechanics — Acero Arequipa		16,449		1,357
Project Mina Gold Fields La Cima S.A.		3,409		15,055
Generating Plant Machu Picchu		13,098		15,653
Works and Consortiums		11,311		6,576
Engineering and Construction Works VyV-DSD S.A.		38,194		43,159
Engineering and Construction Works — Morelco S.A.S.		40,400		16,066
Others		16,608		87,749

		409,446		341,701

Parent Company Operation		78,133		63,853

		499,974		413,364

The unbilled receivables (net) – Concessions (Note 2.5), corresponds to future collections for public services granted according to the following:


	2019		2020
Tren Urbano de Lima S.A.		208,205		235,763
Survial S.A.		16,466		10,611
Norvial S.A.		2,149		15,436
Concesión Canchaque S.A.C.		6,700		4,401
Concesionaria La Chira S.A.		1,168		565

		234,688		266,776

Summary of Aging of Trade Accounts Receivable

The detail of the age of the commercial receivables net of impairment corresponds as follows:


	2019		2020
Current		817,233		718,220
0 to 30 days past due		45,922		5,737
31 to 90 days past due		27,364		6,801
91 to 120 days past due		1,319		2,279
121 to 360 days past due		10,502		4,185
Over 360 days past due		56,811		16,471

		959,151		753,693

Summary Of Reconcilaition Of Impairment Loss In Trade Accounts Receivable Explanatory

The movement of impairment in trade accounts receivable is as follows:


	2018			2019			2020
Balance at January, 1		(17,227	)		(7,633	)		(8,422	)
Impairment, net (Note 26.ii)		(3,065	)		(955	)		(19,772	)
Impairment, net (Note 28.b)		—			—			(33,874	)
Write-off		12,873			12			5,653
Exchange difference		(214	)		37			(212	)
Translation adjustments		—			117			(3	)

Balance at December, 31		(7,633	)		(8,422	)		(56,630	)

Summary Of Unbilled Receivables At Fair Values And Carrying Amount Explanatory

The fair value and carrying amount for this concept are detailed below:


	Carrying amount				Fair value
	2019		2020		2019		2020
Tren Urbano de Lima S.A.		579,765		590,092		696,665		783,643

		579,765		590,092		696,665		783,643