Condensed Unaudited Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 15,924,000	$ 22,927,000
Accounts receivable, net of allowance	1,288,672,000	1,134,693,000
Inventories, net	115,627,000	70,185,000
Prepaid expenses and other current assets, including discontinued operations (See Note 4)	69,429,000	79,221,000
Total current assets	1,489,652,000	1,307,026,000
Property and equipment, net	618,672,000	488,132,000
Goodwill	983,133,000	902,044,000
Other intangible assets, net	230,592,000	165,606,000
Other long-term assets, including discontinued operations (See Note 4)	73,821,000	60,390,000
Total assets	3,395,870,000	2,923,198,000
Current liabilities
Current maturities of long-term debt	76,914,000	51,376,000
Accounts payable	494,090,000	424,917,000
Accrued salaries and wages	63,845,000	66,455,000
Other accrued expenses	69,401,000	71,448,000
Billings in excess of costs and earnings	109,805,000	121,641,000
Other current liabilities, including discontinued operations (See Note 4)	17,940,000	26,162,000
Total current liabilities	868,474,000	829,225,000
Long-term debt	1,088,666,000	765,425,000
Long-term deferred tax liabilities, net	186,538,000	154,763,000
Other liabilities	43,949,000	40,357,000
Total liabilities	2,304,556,000	1,902,140,000
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 - 87,036,192 and 86,725,372 as of June 30, 2014 and December 31, 2013, respectively	8,704,000	8,672,000
Capital surplus	776,301,000	822,836,000
Retained earnings	389,937,000	341,864,000
Accumulated other comprehensive loss	(10,943,000)	(13,286,000)
Treasury stock, at cost; 5,262,831 and 9,467,286 shares as of June 30, 2014 and December 31, 2013, respectively	(83,385,000)	(150,000,000)
Total MasTec, Inc. shareholders' equity	1,086,616,000	1,016,088,000
Non-controlling interests	4,698,000	4,970,000
Total equity	1,091,314,000	1,021,058,000
Total liabilities and equity	3,395,870,000	2,923,198,000
Investor [Member] | Contributed Shares [Member]
Equity
Contributed shares	6,002,000	6,002,000
Earn-Out Arrangements [Member]
Current liabilities
Acquisition-related contingent consideration, current	36,479,000	67,226,000
Acquisition-related contingent consideration, net of current portion	$ 116,929,000	$ 112,370,000