Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 1,698,279	$ 2,016,618	$ 4,684,180	$ 5,473,965
Costs of revenue, excluding depreciation and amortization	1,380,522	1,690,558	3,948,644	4,636,006
Depreciation	71,397	50,515	182,173	160,019
Amortization of intangible assets	11,200	4,681	28,384	14,152
General and administrative expenses	72,690	77,146	243,163	220,581
Interest expense, net	13,553	19,297	45,365	58,178
Equity in earnings of unconsolidated affiliates	(7,445)	(6,966)	(22,092)	(19,778)
Loss on extinguishment of debt	5,569	0	5,569	0
Other (income) expense, net	(6,612)	8,002	(18,481)	16,323
Income before income taxes	157,405	173,385	271,455	388,484
Provision for income taxes	(40,520)	(43,303)	(61,681)	(95,073)
Net income	116,885	130,082	209,774	293,411
Net income attributable to non-controlling interests	394	1,486	48	1,993
Net income attributable to MasTec, Inc.	$ 116,491	$ 128,596	$ 209,726	$ 291,418
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)	$ 1.61	$ 1.71	$ 2.87	$ 3.88
Basic weighted average common shares outstanding	72,138	75,217	72,971	75,131
Diluted earnings per share (in dollars per share)	$ 1.59	$ 1.69	$ 2.84	$ 3.85
Diluted weighted average common shares outstanding	73,095	75,934	73,787	75,760