RELATED PARTY TRANSACTIONS: (Tables)

3 Months Ended

Mar. 31, 2015

Receivable and payable balances with related parties

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

	At March 31, 2015		At December 31, 2014
Related parties receivable current:
Asarco LLC	$	0.8	$	—
Compania Perforadora Mexico S.A.P.I. de C.V. and affiliates	0.4		0.2
Grupo Mexico	0.8		0.7
Mexico Generadora de Energia S. de R.L. (“MGE”)	24.1		31.9
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	0.1		—
	$	26.2	$	32.8

Related parties receivable non-current:
MGE	$	161.2	$	161.2

	At March 31, 2015		At December 31, 2014
Related parties payable:
Asarco LLC	$	—	$	13.8
Breaker S.A. de C.V. and affiliates (“Breaker”)	0.2		0.7
Eolica El Retiro, S.A.P.I. de C.V.	0.2		1.6
Ferrocarril Mexicano S.A. de C.V.	0.5		1.8
Grupo Mexico	5.9		2.8
Higher Technology S.A.C.	—		0.2
MGE	4.7		45.2
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	2.0		1.7
Mexico Transportes Aereos S.A. de C.V. (“Mextransport”)	1.4		1.3
	$	14.9	$	69.1

Grupo Mexico and affiliates

Related party transactions

Purchase and sales activities with related parties

The following table summarizes the purchase and sale activities with Grupo Mexico and its affiliates in the three months ended March 31, 2015 and 2014 (in millions):

	2015		2014
Purchase activity
Asarco LLC	$	7.7	$	15.1
Compania Perforadora Mexico S.A.P.I. de C.V and affiliates	0.3		1.2
Eolica El Retiro, S.A.P.I. de C.V.	3.9		—
Ferrocarril Mexicano S.A de C.V.	3.3		5.3
Grupo Mexico		3.4		3.5
MGE	37.8		48.9
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	10.6		47.2
Total Purchases	$	67.0	$	121.2

Sales activity
Asarco LLC	$	35.9	$	—
Compania Perforadora Mexico S.A.P.I. de C.V and affiliates	0.1		0.1
MGE	22.2		24.3
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	0.2		0.2
Total Sales	$	58.4	$	24.6

Companies with relationship to the controlling group

Related party transactions

Purchase and sales activities with related parties

The following table summarizes the purchase and sales activities with other Larrea family companies in the three months ended March 31, 2015 and 2014 (in millions):

Mextransport:	2015		2014

Purchase activity	$	0.1	$	0.6

Sales activity	$	0.1	$	0.1

Companies with relationship to SCC executive officers' families

Related party transactions

Purchase activity with related parties

The following table summarizes the purchase activities with companies with relationships to SCC executive officers in the three months ended March 31, 2015 and 2014 (in millions):

	2015		2014
Breaker	$	0.3	$	0.9
Higher Technology S.A.C.	0.3		0.3
Sempertrans and affiliates	0.2		0.3
Servicios y Fabricaciones Mecanicas S.A.C.	0.2		0.3
Total purchases	$	1.0	$	1.8