Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income (loss) attributable to MasTec:
Net income (loss) - basic	$ 33,988	$ 15,542	$ (7,192)	$ (64,998)
Net income (loss) - diluted	$ 33,988	$ 15,542	$ (7,192)	$ (64,998)
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	78,038	77,635	77,984	77,306
Dilutive common stock equivalents (in shares)	822	737	0	0
Weighted average shares outstanding - diluted (in shares)	78,860	78,372	77,984	77,306
Anti-dilutive common stock (in shares)	5	2	929	1,147