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Segments and Related Information (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 segment | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Reportable Geographical Components [Member] UNITED STATES [Member] | Dec. 31, 2012 Reportable Geographical Components [Member] UNITED STATES [Member] | Dec. 31, 2011 Reportable Geographical Components [Member] UNITED STATES [Member] | Dec. 31, 2013 Reportable Geographical Components [Member] Foreign Operation [Member] | Dec. 31, 2012 Reportable Geographical Components [Member] Foreign Operation [Member] | Dec. 31, 2011 Reportable Geographical Components [Member] Foreign Operation [Member] | Jun. 30, 2011 EC Source [Member] | Dec. 31, 2013 Communications [Member] | Dec. 31, 2013 Communications [Member] Operating Segments [Member] | Dec. 31, 2012 Communications [Member] Operating Segments [Member] | Dec. 31, 2011 Communications [Member] Operating Segments [Member] | Dec. 31, 2013 Communications [Member] Customer Concentration Risk [Member] Sales Revenue, Services, Net [Member] Utilities [Member] Operating Segments [Member] | Dec. 31, 2012 Communications [Member] Customer Concentration Risk [Member] Sales Revenue, Services, Net [Member] Utilities [Member] Operating Segments [Member] | Dec. 31, 2011 Communications [Member] Customer Concentration Risk [Member] Sales Revenue, Services, Net [Member] Utilities [Member] Operating Segments [Member] | Dec. 31, 2013 Oil and Gas [Member] | Dec. 31, 2013 Oil and Gas [Member] Operating Segments [Member] | Dec. 31, 2012 Oil and Gas [Member] Operating Segments [Member] | Dec. 31, 2011 Oil and Gas [Member] Operating Segments [Member] | Dec. 31, 2013 Electrical Transmission [Member] | Dec. 31, 2013 Electrical Transmission [Member] Operating Segments [Member] | Dec. 31, 2012 Electrical Transmission [Member] Operating Segments [Member] | Dec. 31, 2011 Electrical Transmission [Member] Operating Segments [Member] | Dec. 31, 2013 Power Generation and Industrial [Member] | Dec. 31, 2013 Power Generation and Industrial [Member] Operating Segments [Member] | Dec. 31, 2012 Power Generation and Industrial [Member] Operating Segments [Member] | Dec. 31, 2011 Power Generation and Industrial [Member] Operating Segments [Member]
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting, factors used to identify entity's reportable segments |  |  |  |  |  |  |  |  | MasTec presents its continuing operations under five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. This structure is generally focused on broad end-user markets for MasTec's labor-based construction services. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, description of products and services |  |  |  |  |  |  |  |  | All five reportable segments derive their revenues from the engineering, installation and maintenance of infrastructure, primarily in North America. |  |  |  |  |  |  |  |  |  | The Communications segment performs engineering, construction and maintenance of communications infrastructure primarily related to wireless and wireline communications and install to the home, and to a lesser extent, infrastructure for electrical utilities. |  |  |  |  |  |  | MasTec performs engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries through its Oil and Gas segment. |  |  |  | The Electrical Transmission segment primarily serves the energy and utility industries through the engineering, construction and maintenance of electrical transmission lines and substations. |  |  |  | The Power Generation and Industrial segment primarily serves the energy and utility end markets and other end markets through the installation and construction of conventional and renewable power plants, related electrical transmission infrastructure, ethanol facilities and various types of industrial infrastructure. |  |  |
Segment reporting, description of all other segments |  |  |  |  |  |  |  |  | The Other segment primarily includes small business units that perform construction services for a variety of end markets in Mexico and elsewhere internationally. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting, transactions between reportable segments |  |  |  |  |  |  |  |  | Intercompany revenues and costs among the reportable segments are de minimus and accounted for as if the sales were to third parties because these items are based on negotiated fees between the segments involved. All intercompany transactions and balances are eliminated in consolidation. Intercompany revenues and costs between entities within a reportable segment are eliminated to arrive at segment totals. Eliminations between segments are separately presented. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting, additional information about entity's reportable segments |  |  |  |  |  |  |  |  | Segment results include certain allocations of centralized costs such as general liability, medical and workers' compensation insurance and certain information technology costs. Income tax expense is managed by Corporate on a consolidated basis and is not allocated to the reportable segments. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on remeasurement of equity interest in acquiree |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 29,041,000 |  |  |  |  |  |  | $ 29,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue, major customer, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.90% | 10.90% | 8.90% |  |  |  |  |  |  |  |  |  |  |  |
Revenue | 1,159,100,000 | 1,269,400,000 | 977,600,000 | 918,600,000 | 932,400,000 | 1,067,300,000 | 988,900,000 | 738,300,000 | 4,324,787,000 | 3,726,789,000 | 2,831,292,000 | 4,100,000,000 | 3,600,000,000 | 2,700,000,000 | 268,100,000 | 156,800,000 | 91,500,000 |  |  | 1,962,600,000 | 1,772,700,000 | 1,635,100,000 |  |  |  |  | 1,628,800,000 | 959,000,000 | 774,300,000 |  | 428,800,000 | 312,200,000 | 198,300,000 |  | 294,300,000 | 668,100,000 | 219,600,000
Property and equipment, net | 488,132,000 |  |  |  | 348,858,000 |  |  |  | 488,132,000 | 348,858,000 |  | 436,900,000 | 337,500,000 | 251,900,000 | 51,200,000 | 11,400,000 | 11,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets and goodwill, net | $ 1,065,000,000 |  |  |  | $ 963,600,000 |  |  |  | $ 1,065,000,000 | $ 963,600,000 |  | $ 972,200,000 | $ 933,100,000 | $ 794,100,000 | $ 92,700,000 | $ 30,500,000 | $ 31,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Description of the factors used to identify reportable segments, including the basis of organization (for example, whether management has chosen to organize the enterprise around differences in products and services, geographic areas, regulatory environments, or a combination of factors and whether operating segments have been aggregated to reportable segments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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