Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue		$ 2,016,618	$ 1,977,227	$ 5,473,965	$ 4,991,865
Costs of revenue, excluding depreciation and amortization		1,690,558	1,681,438	4,636,006	4,285,320
Depreciation and amortization		55,196	54,863	174,171	156,478
General and administrative expenses		77,146	80,311	220,581	211,535
Interest expense, net		19,297	22,330	58,178	60,183
Equity in earnings of unconsolidated affiliates		(6,966)	(7,671)	(19,778)	(19,080)
Other expense (income), net		8,002	323	16,323	(1,976)
Income before income taxes		173,385	145,633	388,484	299,405
Provision for income taxes		(43,303)	(25,091)	(95,073)	(71,999)
Net income		130,082	120,542	293,411	227,406
Net income (loss) attributable to non-controlling interests		1,486	(124)	1,993	(312)
Net income attributable to MasTec, Inc.	[1]	$ 128,596	$ 120,666	$ 291,418	$ 227,718
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)		$ 1.71	$ 1.55	$ 3.88	$ 2.87
Basic weighted average common shares outstanding		75,217	78,096	75,131	79,399
Diluted earnings per share (in dollars per share)		$ 1.69	$ 1.52	$ 3.85	$ 2.83
Diluted weighted average common shares outstanding		75,934	79,201	75,760	80,484

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