Earnings Per Share - Schedule of Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net (loss) income attributable to MasTec:
Net (loss) income - basic	$ (49,949)	$ 33,354	$ 328,831
Fair value gain related to resolved contingent payments	0	1,682	0
Net (loss) income -diluted	$ (49,949)	$ 31,672	$ 328,831
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	77,535	74,917	72,499
Dilutive common stock equivalents (in shares)	0	1,268	1,442
Weighted average shares outstanding - diluted (in shares)	77,535	76,185	73,941