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, 2021			95,371,211
Beginning balance at Dec. 31, 2021	$ 2,543,861	$ 2,539,809	$ 9,537	$ (586,955)	$ 1,033,615	$ 2,162,388	$ (78,776)	$ 4,052
Beginning balance, treasury shares (in shares) at Dec. 31, 2021				(18,941,926)
Condensed Unaudited Consolidated Statements of Equity
Net (loss) income	30,518	30,130				30,130		388
Other comprehensive income	27,455	27,455					27,455
Non-cash stock-based compensation	18,870	18,870			18,870
Issuance of restricted shares, net (in shares)			145,450
Issuance of restricted shares, net	0	0	$ 15		(15)
Shares withheld for taxes, net of other stock issuances (in shares)			(49,016)
Shares withheld for taxes, net of other stock issuances	(4,122)	(4,122)	$ (5)		(4,117)
Issuance of shares in connection with acquisition (in shares)				133,157
Issuance of shares in connection with acquisition	$ 11,222	11,222		$ 4,336	6,886
Acquisition of treasury stock, at cost (in shares)	(1,124,000)			(1,124,286)
Acquisition of treasury stock, at cost	$ (81,291)	(81,291)		$ (81,291)
Ending balance, common shares outstanding (in shares) at Sep. 30, 2022			95,467,645
Ending balance at Sep. 30, 2022	2,546,513	2,542,073	$ 9,547	$ (663,910)	1,055,239	2,192,518	(51,321)	4,440
Ending balance, treasury shares (in shares) at Sep. 30, 2022				(19,933,055)
Beginning balance, common shares outstanding (in shares) at Jun. 30, 2022			95,491,405
Beginning balance at Jun. 30, 2022	2,484,942	2,480,828	$ 9,549	$ (663,910)	1,049,576	2,143,622	(58,009)	4,114
Beginning balance, treasury shares (in shares) at Jun. 30, 2022				(19,933,055)
Condensed Unaudited Consolidated Statements of Equity
Net (loss) income	49,222	48,896				48,896		326
Other comprehensive income	6,688	6,688					6,688
Non-cash stock-based compensation	5,698	5,698			5,698
Forfeiture of restricted shares, net (in shares)			(23,312)
Forfeiture of restricted shares, net	0		$ (2)		2
Shares withheld for taxes, net of other stock issuances (in shares)			(448)
Shares withheld for taxes, net of other stock issuances	$ (37)	(37)			(37)
Acquisition of treasury stock, at cost (in shares)	0
Ending balance, common shares outstanding (in shares) at Sep. 30, 2022			95,467,645
Ending balance at Sep. 30, 2022	$ 2,546,513	2,542,073	$ 9,547	$ (663,910)	1,055,239	2,192,518	(51,321)	4,440
Ending balance, treasury shares (in shares) at Sep. 30, 2022				(19,933,055)
Beginning balance, common shares outstanding (in shares) at Dec. 31, 2022	98,615,105		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)			(19,933,055)
Condensed Unaudited Consolidated Statements of Equity
Net (loss) income	$ (48,487)	(50,702)				(50,702)		2,215
Other comprehensive 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)
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)
Acquisition-related assumption of non-controlling interest	$ 6,828							6,828
Acquisition of treasury stock, at cost (in shares)	0
Ending balance, common shares outstanding (in shares) at Sep. 30, 2023	98,638,673		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)			(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 (loss) income	15,305	14,296				14,296		1,009
Other comprehensive 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		$ (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)
Acquisition of treasury stock, at cost (in shares)	0
Ending balance, common shares outstanding (in shares) at Sep. 30, 2023	98,638,673		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)			(19,813,055)