Earnings Per Share - Schedule of Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net income (loss) attributable to MasTec:
Net income (loss) - basic	$ 162,788	$ (49,949)	$ 33,354
Fair value gain related to resolved contingent payments	0	0	1,682
Net income (loss) -diluted	$ 162,788	$ (49,949)	$ 31,672
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	78,049	77,535	74,917
Dilutive common stock equivalents (in shares)	831	0	1,268
Weighted average shares outstanding - diluted (in shares)	78,880	77,535	76,185