Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 6,320,975	$ 7,183,188	$ 6,909,417
Costs of revenue, excluding depreciation and amortization	5,270,879	6,070,244	5,939,308
Depreciation	258,841	212,485	192,332
Amortization of intangible assets	38,910	22,997	20,598
Goodwill and intangible asset impairment	0	3,319	47,662
General and administrative expenses	319,192	299,500	287,278
Interest expense, net	59,629	77,026	82,571
Equity in earnings of unconsolidated affiliates	(29,738)	(27,367)	(23,855)
Loss on extinguishment of debt	5,569	0	0
Other (income) expense, net	(27,471)	14,045	(1,780)
Income before income taxes	425,164	510,939	365,303
Provision for income taxes	(102,465)	(116,843)	(106,072)
Net income	322,699	394,096	259,231
Net (loss) income attributable to non-controlling interests	(149)	1,762	(428)
Net income attributable to MasTec, Inc.	$ 322,848	$ 392,334	$ 259,659
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)	$ 4.43	$ 5.22	$ 3.30
Basic weighted average common shares outstanding	72,799	75,185	78,695
Diluted earnings per share (in dollars per share)	$ 4.38	$ 5.17	$ 3.26
Diluted weighted average common shares outstanding	73,715	75,846	79,772