Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue		$ 1,890,180	$ 1,232,404	$ 3,048,364	$ 2,206,630
Costs of revenue, excluding depreciation and amortization		1,626,335	1,068,182	2,597,469	1,952,583
Depreciation and amortization		45,379	40,657	88,282	79,664
General and administrative expenses		70,823	67,852	135,604	127,900
Interest expense, net		14,791	12,639	27,388	24,797
Equity in earnings of unconsolidated affiliates		(6,060)	(489)	(7,706)	(3,555)
Other expense (income), net		146	1,524	576	(11,830)
Income before income taxes		138,766	42,039	206,751	37,071
Provision for income taxes		(55,434)	(17,601)	(82,792)	(15,514)
Net income		83,332	24,438	123,959	21,557
Net income attributable to non-controlling interests		1,664	350	1,321	162
Net income attributable to MasTec, Inc.	[1]	$ 81,668	$ 24,088	$ 122,638	$ 21,395
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)		$ 1.01	$ 0.30	$ 1.52	$ 0.27
Basic weighted average common shares outstanding		80,925	80,351	80,812	80,253
Diluted earnings per share (in dollars per share)		$ 0.99	$ 0.30	$ 1.49	$ 0.26
Diluted weighted average common shares outstanding		82,292	81,266	82,226	81,043

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