Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue		$ 1,955,752	$ 1,586,181	$ 5,004,116	$ 3,792,811
Costs of revenue, excluding depreciation and amortization		1,726,173	1,368,988	4,323,642	3,321,571
Depreciation and amortization		50,101	42,584	138,384	122,249
General and administrative expenses		66,397	67,131	202,001	195,031
Interest expense, net		17,578	13,097	44,966	37,895
Equity in (earnings) losses of unconsolidated affiliates		(7,399)	6	(15,105)	(3,549)
Other income, net		(4,677)	(971)	(4,102)	(12,803)
Income before income taxes		107,579	95,346	314,330	132,417
Provision for income taxes		(43,378)	(38,816)	(126,170)	(54,331)
Net income		64,201	56,530	188,160	78,086
Net income attributable to non-controlling interests		449	253	1,770	414
Net income attributable to MasTec, Inc.	[1]	$ 63,752	$ 56,277	$ 186,390	$ 77,672
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)		$ 0.79	$ 0.70	$ 2.31	$ 0.97
Basic weighted average common shares outstanding		80,953	80,462	80,859	80,323
Diluted earnings per share (in dollars per share)		$ 0.77	$ 0.69	$ 2.27	$ 0.96
Diluted weighted average common shares outstanding		82,386	81,545	82,281	81,241

[1] Calculated as total net income less amounts attributable to non-controlling interests.