Condensed Unaudited Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 9,261,000	$ 22,927,000
Accounts receivable, net of allowance	1,195,603,000	1,134,577,000
Inventories, net	89,146,000	70,185,000
Prepaid expenses and other current assets, including discontinued operations (See Note 4)	63,926,000	78,534,000
Total current assets	1,357,936,000	1,306,223,000
Property and equipment, net	509,585,000	488,132,000
Goodwill	912,885,000	900,454,000
Other intangible assets, net	171,562,000	165,606,000
Other long-term assets, including discontinued operations (See Note 4)	61,439,000	60,552,000
Total assets	3,013,407,000	2,920,967,000
Current liabilities:
Current maturities of long-term debt	52,949,000	51,376,000
Accounts payable	440,152,000	424,917,000
Accrued salaries and wages	68,055,000	66,455,000
Other accrued expenses	60,581,000	71,448,000
Billings in excess of costs and earnings	109,370,000	121,641,000
Other current liabilities, including discontinued operations (See Note 4)	24,588,000	26,162,000
Total current liabilities	820,389,000	826,746,000
Long-term debt	841,335,000	765,425,000
Long-term deferred tax liabilities, net	154,151,000	155,012,000
Other liabilities	40,929,000	40,357,000
Total liabilities	1,976,560,000	1,899,910,000
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 - 86,993,988 and 86,725,372 as of March 31, 2014 and December 31, 2013, respectively	8,700,000	8,672,000
Capital surplus	827,863,000	822,836,000
Retained earnings	357,887,000	341,864,000
Accumulated other comprehensive loss	(18,621,000)	(13,286,000)
Treasury stock, at cost; 9,467,286 shares as of both March 31, 2014 and December 31, 2013	(150,000,000)	(150,000,000)
Total MasTec, Inc. shareholders' equity	1,031,831,000	1,016,088,000
Non-controlling interests	5,016,000	4,969,000
Total equity	1,036,847,000	1,021,057,000
Total liabilities and equity	3,013,407,000	2,920,967,000
Investor [Member] | Contributed Shares [Member]
Equity:
Contributed shares (See Note 11)	6,002,000	6,002,000
Earn-out Arrangements [Member]
Current liabilities:
Acquisition-related contingent consideration, current	64,694,000	64,747,000
Acquisition-related contingent consideration, net of current portion	$ 119,756,000	$ 112,370,000