Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue	$ 1,066,629	$ 1,107,232	$ 2,069,896	$ 2,065,050
Costs of revenue, excluding depreciation and amortization	945,947	950,715	1,832,361	1,792,040
Depreciation and amortization	43,254	36,755	85,852	70,249
General and administrative expenses	69,250	54,237	143,279	107,564
Interest expense, net	12,907	12,949	23,880	24,952
Other income, net	(2,353)	(1,923)	(2,360)	(4,007)
(Loss) income from continuing operations before income taxes	(2,376)	54,499	(13,116)	74,252
(Provision for) benefit from income taxes	(1,444)	(20,761)	2,908	(28,250)
Net (loss) income from continuing operations	(3,820)	33,738	(10,208)	46,002
Discontinued operations:
Net loss from discontinued operations	0	(149)	0	(272)
Net (loss) income	(3,820)	33,589	(10,208)	45,730
Net loss attributable to non-controlling interests	(120)	(136)	(245)	(91)
Net (loss) income attributable to MasTec, Inc.	$ (3,700)	$ 33,725	$ (9,963)	$ 45,821
Basic (loss) earnings per share:
Continuing operations (in dollars per share)	$ (0.05)	$ 0.43	$ (0.12)	$ 0.59
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total basic (loss) earnings per share (in dollars per share)	$ (0.05)	$ 0.43	$ (0.12)	$ 0.59
Basic weighted average common shares outstanding (in shares)	79,830	78,269	81,106	77,810
Diluted (loss) earnings per share:
Continuing operations (in dollars per share)	$ (0.05)	$ 0.39	$ (0.12)	$ 0.53
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total diluted (loss) earnings per share (in dollars per share)	$ (0.05)	$ 0.39	$ (0.12)	$ 0.53
Diluted weighted average common shares outstanding (in shares)	79,830	86,730	81,106	86,675