Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total MasTec, Inc. Shareholders’ Equity	Common Stock	Treasury Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Loss	Non-Controlling Interests
Beginning balance, common shares outstanding (in shares) at Dec. 31, 2022			98,615,105
Beginning balance at Dec. 31, 2022	$ 2,741,187	$ 2,737,329	$ 9,862	$ (663,910)	$ 1,246,590	$ 2,195,742	$ (50,955)	$ 3,858
Beginning balance, treasury shares (in shares) at Dec. 31, 2022				(19,933,055)
Condensed Unaudited Consolidated Statements of Equity
Net income (loss)	(48,487)	(50,702)				(50,702)		2,215
Other comprehensive loss (income)	4,864	4,864					4,864
Non-cash stock-based compensation	24,336	24,336			24,336
Issuance of restricted shares, net (in shares)			137,406
Issuance of restricted shares, net	0	0	$ 14		(14)
Shares withheld for taxes, net of other stock issuances(in shares)			(117,950)
Shares withheld for taxes, net of other stock issuances	(5,410)	(5,410)	$ (12)		(5,398)
Acquisition-related assumption of non-controlling interest	6,828							6,828
Issuance of shares in connection with acquisition (in shares)			4,112
Issuance of shares in connection with acquisition	403	403			403
Purchase of non-controlling interests (in shares)				120,000
Purchase of non-controlling interests	(10,000)	(7,476)		$ 3,997	(11,473)			(2,524)
Ending balance, common shares outstanding (in shares) at Sep. 30, 2023			98,638,673
Ending balance at Sep. 30, 2023	2,713,721	2,703,344	$ 9,864	$ (659,913)	1,254,444	2,145,040	(46,091)	10,377
Ending balance, treasury shares (in shares) at Sep. 30, 2023				(19,813,055)
Beginning balance, common shares outstanding (in shares) at Jun. 30, 2023			98,674,249
Beginning balance at Jun. 30, 2023	2,688,420	2,679,052	$ 9,867	$ (659,913)	1,247,231	2,130,744	(48,877)	9,368
Beginning balance, treasury shares (in shares) at Jun. 30, 2023				(19,813,055)
Condensed Unaudited Consolidated Statements of Equity
Net income (loss)	15,305	14,296				14,296		1,009
Other comprehensive loss (income)	2,786	2,786					2,786
Non-cash stock-based compensation	7,246	7,246			7,246
Forfeiture of restricted shares, net (in shares)			(35,183)
Forfeiture of restricted shares, net	0	0	$ (3)		3
Shares withheld for taxes, net of other stock issuances(in shares)			(393)
Shares withheld for taxes, net of other stock issuances	(36)	(36)			(36)
Ending balance, common shares outstanding (in shares) at Sep. 30, 2023			98,638,673
Ending balance at Sep. 30, 2023	$ 2,713,721	2,703,344	$ 9,864	$ (659,913)	1,254,444	2,145,040	(46,091)	10,377
Ending balance, treasury shares (in shares) at Sep. 30, 2023				(19,813,055)
Beginning balance, common shares outstanding (in shares) at Dec. 31, 2023	99,093,134		99,093,134
Beginning balance at Dec. 31, 2023	$ 2,721,261	2,706,152	$ 9,909	$ (659,913)	1,263,360	2,145,793	(52,997)	15,109
Beginning balance, treasury shares (in shares) at Dec. 31, 2023	(19,813,055)			(19,813,055)
Condensed Unaudited Consolidated Statements of Equity
Net income (loss)	$ 114,719	88,048				88,048		26,671
Other comprehensive loss (income)	(5,779)	(5,779)					(5,779)
Non-cash stock-based compensation	24,046	24,046			24,046
Forfeiture of restricted shares, net (in shares)			(30,455)
Forfeiture of restricted shares, net	0	0	$ (3)		3
Shares withheld for taxes, net of other stock issuances(in shares)			(32,333)
Shares withheld for taxes, net of other stock issuances	(2,801)	(2,801)	$ (3)		(2,798)
Distributions to non-controlling interests	(23,499)							(23,499)
Acquisition-related assumption of non-controlling interest	$ 765							765
Ending balance, common shares outstanding (in shares) at Sep. 30, 2024	99,030,346		99,030,346
Ending balance at Sep. 30, 2024	$ 2,828,712	2,809,666	$ 9,903	$ (659,913)	1,284,611	2,233,841	(58,776)	19,046
Ending balance, treasury shares (in shares) at Sep. 30, 2024	(19,813,055)			(19,813,055)
Beginning balance, common shares outstanding (in shares) at Jun. 30, 2024			99,044,551
Beginning balance at Jun. 30, 2024	$ 2,734,107	2,714,364	$ 9,904	$ (659,913)	1,277,301	2,138,601	(51,529)	19,743
Beginning balance, treasury shares (in shares) at Jun. 30, 2024				(19,813,055)
Condensed Unaudited Consolidated Statements of Equity
Net income (loss)	105,410	95,240				95,240		10,170
Other comprehensive loss (income)	(7,247)	(7,247)					(7,247)
Non-cash stock-based compensation	7,348	7,348			7,348
Forfeiture of restricted shares, net (in shares)			(13,844)
Forfeiture of restricted shares, net	0	0	$ (1)		1
Shares withheld for taxes, net of other stock issuances(in shares)			(361)
Shares withheld for taxes, net of other stock issuances	(39)	(39)			(39)
Distributions to non-controlling interests	$ (10,867)							(10,867)
Ending balance, common shares outstanding (in shares) at Sep. 30, 2024	99,030,346		99,030,346
Ending balance at Sep. 30, 2024	$ 2,828,712	$ 2,809,666	$ 9,903	$ (659,913)	$ 1,284,611	$ 2,233,841	$ (58,776)	$ 19,046
Ending balance, treasury shares (in shares) at Sep. 30, 2024	(19,813,055)			(19,813,055)