Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 2,404,332	$ 1,698,279	$ 6,142,414	$ 4,684,180
Costs of revenue, excluding depreciation and amortization	2,057,336	1,380,522	5,246,427	3,948,644
Depreciation	95,366	71,397	262,132	182,173
Amortization of intangible assets	23,352	11,200	54,522	28,384
General and administrative expenses	91,638	72,690	249,706	243,163
Interest expense, net	13,091	13,553	39,379	45,365
Equity in earnings of unconsolidated affiliates, net	(8,714)	(7,445)	(23,585)	(22,092)
Loss on extinguishment of debt	0	5,569	0	5,569
Other income, net	(7,772)	(6,612)	(24,457)	(18,481)
Income before income taxes	140,035	157,405	338,290	271,455
Provision for income taxes	(27,578)	(40,520)	(83,956)	(61,681)
Net income	112,457	116,885	254,334	209,774
Net income attributable to non-controlling interests	1,370	394	2,147	48
Net income attributable to MasTec, Inc.	$ 111,087	$ 116,491	$ 252,187	$ 209,726
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)	$ 1.53	$ 1.61	$ 3.48	$ 2.87
Basic weighted average common shares outstanding (in shares)	72,503	72,138	72,481	72,971
Diluted earnings per share (in dollars per share)	$ 1.50	$ 1.59	$ 3.41	$ 2.84
Diluted weighted average common shares outstanding (in shares)	73,977	73,095	73,921	73,787