Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net loss attributable to MasTec:
Net loss- basic	$ (80,540)	$ (34,978)
Net loss - diluted	$ (80,540)	$ (34,978)
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	76,984	74,789
Dilutive common stock equivalents (in shares)	0	0
Weighted average shares outstanding - diluted (in shares)	76,984	74,789
Anti-dilutive common stock (in shares)	1,330	1,321
Former Owner Of Acquired Business
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	99	72
Former Owner Of Acquired Business | 2021 Acquisitions
Weighted average shares outstanding:
Dilutive common stock equivalents (in shares)		63