Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 22,927,000	$ 26,382,000
Accounts receivable, net of allowance	1,134,337,000	877,214,000
Inventories	70,185,000	83,939,000
Prepaid expenses and other current assets, including discontinued operations (See Note 4)	78,534,000	62,106,000
Total current assets	1,305,983,000	1,049,641,000
Property and equipment, net	488,132,000	348,858,000
Goodwill	899,364,000	826,629,000
Other intangible assets, net	165,606,000	137,020,000
Other long-term assets, including discontinued operations (See Note 4)	60,553,000	54,160,000
Total assets	2,919,638,000	2,416,308,000
Current liabilities:
Current maturities of long-term debt	51,376,000	52,596,000
Accounts payable	424,917,000	401,175,000
Accrued salaries and wages	66,455,000	31,522,000
Other accrued expenses	71,465,000	45,814,000
Billings in excess of costs and earnings	121,641,000	123,435,000
Other current liabilities, including discontinued operations (See Note 4)	24,945,000	40,377,000
Total current liabilities	825,546,000	714,135,000
Long-term debt	765,425,000	546,323,000
Long-term deferred tax liabilities, net	154,883,000	119,388,000
Other liabilities	40,356,000	38,875,000
Total liabilities	1,898,580,000	1,554,433,000
Commitments and contingencies (See Note 16)
Equity:
Preferred stock, $1.00 par value; authorized shares - 5,000,000; issued and outstanding shares - none	0	0
Common stock, $0.10 par value; authorized shares - 145,000,000; issued shares - 86,725,372 and 85,915,552 as of December 31, 2013 and 2012, respectively	8,672,000	8,592,000
Capital surplus	822,836,000	803,166,000
Retained earnings	341,865,000	200,915,000
Accumulated other comprehensive loss	(13,286,000)	(5,501,000)
Treasury stock, at cost; 9,467,286 shares as of both December 31, 2013 and 2012	(150,000,000)	(150,000,000)
Total MasTec, Inc. shareholders' equity	1,016,089,000	857,172,000
Non-controlling interests	4,969,000	4,703,000
Total equity	1,021,058,000	861,875,000
Total liabilities and equity	2,919,638,000	2,416,308,000
Earn-out Arrangements [Member]
Current liabilities:
Acquisition-related contingent consideration, current	64,747,000	19,216,000
Acquisition-related contingent consideration, net of current portion	112,370,000	135,712,000
Investor [Member] | Contributed Shares [Member]
Equity:
Contributed shares (See Note 11)	$ 6,002,000	$ 0