Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenue	$ 1,159,100		$ 1,269,400		$ 977,600		$ 918,600		$ 932,400		$ 1,067,300		$ 988,900		$ 738,300		$ 4,324,787		$ 3,726,789		$ 2,831,292
Costs of revenue, excluding depreciation and amortization																	3,682,367		3,239,195		2,459,746
Depreciation and amortization																	140,928		92,601		75,228
General and administrative expenses																	215,402		157,524		132,594
Interest expense, net																	46,442		37,376		34,466
Loss on extinguishment of debt																	5,624		0		0
Gain on remeasurement of equity interest in acquiree																	0		0		(29,041)
Other (income) expense, net																	(6,188)		8,017		96
Income from continuing operations before income taxes																	240,214		192,719		159,280
Provision for income taxes																	(92,542)		(76,080)		(61,824)
Net income from continuing operations	42,900		49,900		35,500		19,300		37,700		36,100		31,200		11,700		147,672		116,639		97,456
Discontinued operations:
Net (loss) income from discontinued operations, including loss on disposal and impairment charges (See Note 4)	(1,300)		(3,700)		(500)		(900)		(1,400)		(9,300)		(1,100)		2,500		(6,456)		(9,223)		8,516
Net income																	141,216		107,416		105,972
Net income (loss) attributable to non-controlling interests	100		100		100		0		0		0		0		0		266		(10)		(29)
Net income attributable to MasTec, Inc.	41,500		46,100		34,900		18,400		36,300		26,800		30,100		14,200		140,950		107,426		106,001
Basic earnings (loss) per share:
Continuing operations, basic earnings per share	$ 0.55		$ 0.65		$ 0.46		$ 0.25		$ 0.50		$ 0.47		$ 0.39		$ 0.15		$ 1.92		$ 1.49		$ 1.19
Discontinued operations, basic (loss) earnings per share	$ (0.02)		$ (0.05)		$ (0.01)		$ (0.01)		$ (0.02)		$ (0.12)		$ (0.01)		$ 0.03		$ (0.09)		$ (0.12)		$ 0.10
Total basic earnings per share	$ 0.54	[1]	$ 0.60	[1]	$ 0.46	[1]	$ 0.24	[1]	$ 0.48	[1]	$ 0.35	[1]	$ 0.37	[1]	$ 0.18	[1]	$ 1.83	[1]	$ 1.37	[1]	$ 1.29	[1]
Basic weighted average common shares outstanding																	76,923		78,275		82,182
Diluted earnings (loss) per share:
Continuing operations, diluted earnings per share	$ 0.50		$ 0.59		$ 0.42		$ 0.23		$ 0.46		$ 0.45		$ 0.38		$ 0.14		$ 1.74		$ 1.42		$ 1.13
Discontinued operations, diluted (loss) earnings per share	$ (0.02)		$ (0.04)		$ (0.01)		$ (0.01)		$ (0.02)		$ (0.12)		$ (0.01)		$ 0.03		$ (0.08)		$ (0.11)		$ 0.10
Total diluted earnings per share	$ 0.49	[1]	$ 0.54	[1]	$ 0.41	[1]	$ 0.22	[1]	$ 0.45	[1]	$ 0.34	[1]	$ 0.37	[1]	$ 0.17	[1]	$ 1.66	[1]	$ 1.31	[1]	$ 1.23	[1]
Diluted weighted average common shares outstanding																	84,901		82,082		86,716
Continuing Operations [Member]
Depreciation and amortization																	140,926		91,958		74,151
Interest expense, net																	$ 46,400		$ 37,400		$ 34,500

[1] Earnings per share calculations may contain slight summation differences due to rounding.