Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 1,962,658	$ 1,569,297	$ 3,738,082	$ 2,985,901
Costs of revenue, excluding depreciation and amortization	1,675,232	1,341,825	3,189,091	2,568,122
Depreciation	87,501	57,687	166,766	110,776
Amortization of intangible assets	19,923	9,793	31,170	17,184
General and administrative expenses	84,960	84,959	158,068	170,473
Interest expense, net	13,829	14,808	26,288	31,812
Equity in earnings of unconsolidated affiliates, net	(7,525)	(6,813)	(14,871)	(14,647)
Other income, net	(14,089)	(10,527)	(16,686)	(11,869)
Income before income taxes	102,827	77,565	198,256	114,050
Provision for income taxes	(27,062)	(20,738)	(56,379)	(21,161)
Net income	75,765	56,827	141,877	92,889
Net income (loss) attributable to non-controlling interests	314	(178)	777	(346)
Net income attributable to MasTec, Inc.	$ 75,451	$ 57,005	$ 141,100	$ 93,235
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)	$ 1.04	$ 0.79	$ 1.95	$ 1.27
Basic weighted average common shares outstanding (in shares)	72,501	72,045	72,470	73,392
Diluted earnings per share (in dollars per share)	$ 1.02	$ 0.78	$ 1.91	$ 1.26
Diluted weighted average common shares outstanding (in shares)	73,976	72,777	73,913	74,135