Debt (Debt Guarantees and Covenants) (Narrative) (Details)	3 Months Ended
Mar. 31, 2014
Debt Instrument [Line Items]
Debt instrument, covenant compliance	MasTec was in compliance with all provisions and covenants pertaining to its outstanding debt instruments as of March 31, 2014 and December 31, 2013.
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of voting interests owned, guarantor subsidiaries	100.00%
Total Senior And Senior Convertible Notes [Member] \| Senior Notes [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, guarantees	The Company’s 4.875% Senior Notes, 2011 Convertible Notes and 2009 Convertible Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of the 2013 Credit Facility or other outstanding indebtedness.

MasTec was in compliance with all provisions and covenants pertaining to its outstanding debt instruments as of March 31, 2014 and December 31, 2013.

The Company’s 4.875% Senior Notes, 2011 Convertible Notes and 2009 Convertible Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of the 2013 Credit Facility or other outstanding indebtedness.