Earnings Per Share - Schedule of Earnings Per Share Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income attributable to MasTec:
Net income - basic	$ 328,831	$ 322,848	$ 392,334
Net income - diluted	$ 328,831	$ 322,848	$ 392,334
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	72,499,000	72,799,000	75,185,000
Dilutive common stock equivalents (in shares)	1,442,000	916,000	661,000
Weighted average shares outstanding - diluted (in shares)	73,941,000	73,715,000	75,846,000
Anti-dilutive common stock (in shares)	159,431	43,989