Quarterly Information (Unaudited) (Schedule of Quarterly Financial Information (Unaudited)) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]
Revenue	$ 1,027,400		$ 1,111,000		$ 1,066,600		$ 1,003,300		$ 1,231,300		$ 1,315,500		$ 1,107,200		$ 957,800		$ 4,208,330	$ 4,611,803	$ 4,324,787
Costs of revenue, excluding depreciation and amortization	916,300		972,700		945,900		886,400		1,063,100		1,122,900		950,700		841,300		3,721,303	3,977,963	3,682,367
Net (loss) income from continuing operations	(76,900)		7,400		(3,800)		(6,400)		26,600		49,400		33,700		12,300		(79,703)	122,001	147,672
Net (loss) income attributable to MasTec, Inc.	$ (76,700)		$ 7,600		$ (3,700)		$ (6,300)		$ 21,100		$ 49,000		$ 33,700		$ 12,100		$ (79,110)	$ 115,923	$ 140,950
(Loss) earnings per share from continuing operations:
Basic (in dollars per share)	$ (0.96)	[2]	$ 0.10	[2]	$ (0.05)	[2]	$ (0.08)	[2]	$ 0.33	[2]	$ 0.60	[2]	$ 0.43	[2]	$ 0.16	[2]	$ (0.98)	$ 1.53	$ 1.92
Diluted (in dollars per share)	$ (0.96)	[2]	$ 0.09	[2]	$ (0.05)	[2]	$ (0.08)	[2]	$ 0.32	[2]	$ 0.57	[2]	$ 0.39	[2]	$ 0.14	[2]	$ (0.98)	$ 1.42	$ 1.74

[1] Reflects restated data as previously presented in the Company’s 2014 10-K. See Independent Investigation of the Audit Committee and Related Restatements in Note 1 - Business, Basis of Presentation and Significant Accounting Policies.

[2] Earnings per share calculations, including the sum of the individual quarterly earnings per share amounts to the full year earnings per share amounts, may contain slight summation differences due to rounding.