RELATED PARTY TRANSACTIONS: (Tables)

12 Months Ended

Dec. 31, 2020

RELATED PARTY TRANSACTIONS:

Schedule of receivable and payable balances with related parties

Receivable and payable balances with related parties are shown below (in millions):

	At December 31,
	2020		2019
Related parties receivable current:
Grupo Mexico and affiliates:
Asarco LLC	$	5.3	$	10.8
AMMINCO Apoyo Administrativo, S.A. de C.V. (“AMMINCO”)		—		0.1
Compania Perforadora Mexico S.A.P.I. de C.V. and affiliates		0.3		0.3
Grupo Mexico		2.7		2.7
Mexico Generadora de Energia S. de R.L. ("MGE")		14.4		15.3
Grupo Mexico Servicios de Ingenieria, S.A. de C.V.		0.2		0.2
Related to the controlling group:
Boutique Bowling de Mexico S.A. de C.V.		0.2		0.1
Mexico Transportes Aereos, S.A. de C.V. ("Mextransport")		—		0.4
Operadora de Cinemas S.A. de C.V.		0.2		0.1
	$	23.3	$	30.0
Related parties receivable non-current:
Grupo Mexico and affiliates:
Asarco LLC	$	—		59.5
Related parties payable:
Grupo Mexico and affiliates:
Asarco LLC	$	13.9	$	4.3
AMMINCO		19.6		16.9
Eolica El Retiro, S.A.P.I. de C.V.		0.3		—
Ferrocarril Mexicano S.A. de C.V.		4.7		6.4
Grupo Mexico		0.9		1.1
MGE		40.8		40.2
Mexico Compania Constructora S.A de C.V.		22.9		16.0
Grupo Mexico Servicios de Ingenieria, S.A. de C.V.		0.7		—
Related to the controlling group:
Boutique Bowling de Mexico S.A. de C.V.		0.3		0.2
Mexico Transportes Aereos S.A. de C.V. (“Mextransport”)		0.1		1.2
Operadora de Cinemas S.A. de C.V.		0.1		0.1
	$	104.3	$	86.4

Grupo Mexico and affiliates

RELATED PARTY TRANSACTIONS:

Schedule of purchase and sales activities with related parties

The following table summarizes the purchase and sale activities with Grupo Mexico and its affiliates in 2020, 2019 and 2018 (in millions):

	2020		2019		2018
Purchase activity
Asarco LLC	$	233.9	$	37.6	$	37.2
AMMINCO		18.6		17.8		8.0
Eolica El Retiro, S.A.P.I. de C.V.		1.0		2.9		3.6
Ferrocarril Mexicano, S.A. de C.V.		45.8		44.1		41.7
Grupo Mexico		10.0		10.0		10.1
MGE		213.3		202.2		200.1
Mexico Compania Constructora S.A de C.V.		42.6		60.3		72.9
Grupo Mexico Servicios de Ingenieria, S.A. de C.V.		11.1		10.7		6.9
Total purchases	$	576.3	$	385.6	$	380.5
Sales activity
Asarco LLC	$	77.9	$	11.3	$	81.8
AMMINCO		0.1		0.1		0.3
Ferrocarril Mexicano, S.A. de C.V.		—		0.1		—
MGE		54.9		47.4		68.2
Total sales	$	132.9	$	58.9	$	150.3

Related to the controlling group

RELATED PARTY TRANSACTIONS:

Schedule of purchase and sales activities with related parties

The following table summarizes the purchase and sales activities with other Larrea family companies in 2020, 2019 and 2018 (in millions):

	2020		2019		2018
Purchase activity
Boutique Bowling de Mexico S.A. de C.V.	$	0.4	$	0.4	$	0.3
Mextransport		3.5		2.3		12.4
Operadora de Cinemas S.A. de C.V.		0.2		0.2		0.2
Total purchases	$	4.1	$	2.9	$	12.9
Sales activity
Boutique Bowling de Mexico S.A. de C.V.	$	0.1	$	0.1	$	0.2
Empresarios Industriales de Mexico, S.A. de C.V.		—		0.2		—
Mextransport		1.7		1.8		1.2
Operadora de Cinemas S.A. de C.V.		0.1		0.1		0.1
Total sales	$	1.9	$	2.2	$	1.5