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Describes interest rate with related parties, including directors, officers and key employees.

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Represents the number of wind turbines.

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Represents the number of power plants constructed by the related party.

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Amount of total revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle).

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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Reflects the amount of collections received from related parties to reduce the carrying amounts of loans and leases receivable due from them.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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RELATED PARTY TRANSACTIONS: (Details)			12 Months Ended																		1 Months Ended	3 Months Ended	12 Months Ended							12 Months Ended																				12 Months Ended
RELATED PARTY TRANSACTIONS: (Details)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Grupo Mexico and Affiliates USD ($)	Dec. 31, 2013 Grupo Mexico and Affiliates USD ($)	Dec. 31, 2012 Grupo Mexico and Affiliates USD ($)	Dec. 31, 2014 Grupo Mexico USD ($)	Dec. 31, 2013 Grupo Mexico USD ($)	Dec. 31, 2012 Grupo Mexico USD ($)	Dec. 31, 2014 Asarco LLC ("Asarco") USD ($)	Dec. 31, 2013 Asarco LLC ("Asarco") USD ($)	Dec. 31, 2012 Asarco LLC ("Asarco") USD ($)	Dec. 31, 2014 Ferrocarril Mexicano, S.A. de C.V. USD ($)	Dec. 31, 2013 Ferrocarril Mexicano, S.A. de C.V. USD ($)	Dec. 31, 2012 Ferrocarril Mexicano, S.A. de C.V. USD ($)	Dec. 31, 2014 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($)	Dec. 31, 2013 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($)	Dec. 31, 2012 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($)	Dec. 31, 2014 Compania Perforadora Mexico S.A.P.I. de C.V. USD ($)	Dec. 31, 2013 Compania Perforadora Mexico S.A.P.I. de C.V. USD ($)	Dec. 31, 2012 Compania Perforadora Mexico S.A.P.I. de C.V. USD ($)	May 31, 2010 MGE USD ($)	Mar. 31, 2012 MGE USD ($)	Dec. 31, 2014 MGE USD ($)	Dec. 31, 2013 MGE USD ($)	Dec. 31, 2012 MGE USD ($)	Dec. 31, 2005 MGE item	Mar. 31, 2012 MGE Maximum	Mar. 31, 2012 MGE Controladora de Infraestructura Energetica Mexico, S. A. de C. V. USD ($)	Mar. 31, 2012 MGE Controladora de Infraestructura Energetica Mexico, S. A. de C. V. MXN	Dec. 31, 2014 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($)	Dec. 31, 2013 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($)	Dec. 31, 2012 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($)	Dec. 31, 2014 Companies with relationship to SCC executive officers' families USD ($)	Dec. 31, 2013 Companies with relationship to SCC executive officers' families USD ($)	Dec. 31, 2012 Companies with relationship to SCC executive officers' families USD ($)	Dec. 31, 2014 Higher Technology S.A.C. USD ($)	Dec. 31, 2013 Higher Technology S.A.C. USD ($)	Dec. 31, 2012 Higher Technology S.A.C. USD ($)	Dec. 31, 2014 Servicios y Fabricaciones Mecanicas S.A.C. USD ($)	Dec. 31, 2013 Servicios y Fabricaciones Mecanicas S.A.C. USD ($)	Dec. 31, 2012 Servicios y Fabricaciones Mecanicas S.A.C. USD ($)	Dec. 31, 2014 Sempertrans USD ($)	Dec. 31, 2013 Sempertrans USD ($)	Dec. 31, 2012 Sempertrans USD ($)	Dec. 31, 2014 PIGOBA, S.A. de C.V. USD ($)	Dec. 31, 2013 PIGOBA, S.A. de C.V. USD ($)	Dec. 31, 2012 PIGOBA, S.A. de C.V. USD ($)	Dec. 31, 2014 Eolica El Retiro, S.A.P.I de C.V. USD ($)	Aug. 04, 2014 Eolica El Retiro, S.A.P.I de C.V. item	Dec. 31, 2014 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($)	Dec. 31, 2013 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($)	Dec. 31, 2012 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($)	Dec. 31, 2014 Equity investment in affiliate USD ($)	Dec. 31, 2013 Equity investment in affiliate USD ($)	Dec. 31, 2013 Sempertrans and affiliates USD ($)
Related party transactions
Related parties receivables current:	$ 32,835,000us-gaap_DueFromRelatedPartiesCurrent	$ 38,062,000us-gaap_DueFromRelatedPartiesCurrent				$ 700,000	$ 800,000									$ 600,000		$ 200,000	$ 700,000				$ 31,900,000	$ 18,800,000																														$ 17,200,000
Related parties receivable non-current:	161,244,000us-gaap_DueFromRelatedPartiesNoncurrent	161,244,000us-gaap_DueFromRelatedPartiesNoncurrent																					161,200,000	161,200,000	184,000,000
Related parties payables:	69,083,000us-gaap_DueToRelatedPartiesCurrent	28,373,000us-gaap_DueToRelatedPartiesCurrent				2,800,000	3,300,000		13,800,000	6,200,000		1,800,000	3,300,000		1,700,000								45,200,000	14,400,000						1,300,000	600,000					200,000	100,000											1,600,000		700,000	300,000				100,000
Total purchases from related parties			335,000,000	206,400,000	138,100,000	13,900,000	13,800,000	13,900,000	47,900,000	98,000,000	58,600,000	22,700,000	19,700,000	13,900,000	61,400,000	54,400,000	49,500,000	3,100,000	6,100,000	2,200,000			178,400,000	14,400,000						2,500,000	2,700,000	2,700,000	16,400,000	7,900,000	6,700,000	3,200,000	2,200,000	3,100,000	1,300,000	400,000	200,000	1,200,000	1,100,000	300,000	600,000	300,000	800,000	7,600,000		10,100,000	3,900,000	2,300,000
Sales revenues from related parties									24,700,000	88,700,000	23,500,000				800,000	800,000	500,000	600,000	600,000				96,500,000	27,300,000						300,000	300,000	900,000
Total sales revenues from related parties			122,600,000	117,400,000	24,000,000
Number of power plants																										2
Line of credit																					350,000,000
Interest rate (as a percent)																					4.40%				5.75%
Ownership percentage																											0.001%	99.999%	99.999%																								44.20%
Value of interest acquired																												150,000,000	1,928,600,000
Loan repaid																						150,000,000
Loan granted																																																					56,600,000
Interest earned																							$ 9,400,000	$ 9,900,000
Number of wind turbines																																																	37