Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net loss attributable to MasTec:
Net loss - basic	$ (41,180)	$ (80,540)
Net loss - diluted		$ (80,540)
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	77,942	76,984
Dilutive common stock equivalents (in shares)	0	0
Weighted average shares outstanding - diluted (in shares)	77,942	76,984
Anti-dilutive common stock (in shares)	727	1,330
Former Owner Of Acquired Business
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	88	99