10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________________________________

Form 10-Q

_____________________________________________

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2014

Commission File Number 001-08106

_____________________________________________

MasTec, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Florida	65-0829355
(State or Other jurisdiction of	(I.R.S. Employer
Incorporation or Organization)	Identification No.)
800 S. Douglas Road, 12th Floor,
Coral Gables, FL	33134
(Address of Principal Executive Offices)	(Zip Code)

(305) 599-1800

(Registrant’s Telephone Number, Including Area Code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes þ     No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes þ     No ¨

Indicate by check mark if the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	þ		Non-accelerated filer	¨
Accelerated filer	¨	(Do not check if a smaller reporting company)	Smaller reporting company	¨

    Indicate by check mark whether the registrant is shell company (as defined in Rule 12b-2 of the Act.)    Yes ¨   No   þ

As of April 28, 2014, MasTec, Inc. had 77,556,250 shares of common stock, $0.10 par value, outstanding.

MASTEC, INC

FORM 10-Q

QUARTER ENDED MARCH 31, 2014

TABLE OF CONTENTS

		Page
Part I. FINANCIAL INFORMATION		3
Item 1	Financial Statements	3
	Condensed Unaudited Consolidated Statements of Operations	3
	Condensed Unaudited Consolidated Statements of Comprehensive Income	4
	Condensed Unaudited Consolidated Balance Sheets	5
	Condensed Unaudited Consolidated Statements of Cash Flows	6
	Notes to the Condensed Unaudited Consolidated Financial Statements	7
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3	Quantitative and Qualitative Disclosures About Market Risk	35
Item 4	Controls and Procedures	35
Part II. OTHER INFORMATION		35
Item 1	Legal Proceedings	35
Item 1A	Risk Factors	35
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	36
Item 6	Exhibits	36
SIGNATURES		38

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PART I.     FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

MASTEC, INC.

CONDENSED UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

	For the Three Months Ended March 31,
	2014			2013
Revenue	$	964,029		$	918,648
Costs of revenue, excluding depreciation and amortization	841,054			791,499
Depreciation and amortization	33,494			31,753
General and administrative expenses	53,327			48,885
Interest expense, net	12,003			10,045
Loss on extinguishment of debt	—			5,624
Other income, net	(1,955		)	(826		)
Income from continuing operations before income taxes	$	26,106		$	31,668
Provision for income taxes	(9,916		)	(12,348		)
Net income from continuing operations	$	16,190		$	19,320
Discontinued operations:
Net loss from discontinued operations(See Note 4)	$	(122	)	$	(947	)
Net income	$	16,068		$	18,373
Net income attributable to non-controlling interests	45			3
Net income attributable to MasTec, Inc.	$	16,023		$	18,370
Earnings per share:(See Note 2)
Basic earnings (loss) per share:
Continuing operations	$	0.21		$	0.25
Discontinued operations	(0.00		)	(0.01		)
Total basic earnings per share (a)	$	0.21		$	0.24
Basic weighted average common shares outstanding	77,345			76,608
Diluted earnings (loss) per share:
Continuing operations	$	0.19		$	0.23
Discontinued operations	(0.00		)	(0.01		)
Total diluted earnings per share (a)	$	0.19		$	0.22
Diluted weighted average common shares outstanding	86,622			84,094

(a) Earnings per share calculations may contain slight summation differences due to rounding.

The accompanying notes are an integral part of these condensed unaudited consolidated financial statements.

3

MASTEC, INC.

CONDENSED UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	For the Three Months Ended March 31,
	2014			2013
Net income	$	16,068		$	18,373
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of tax (See Note 13)	(5,335		)	(824		)
Changes in value of available-for-sale securities, net of tax (See Note 13)	—			221
Other comprehensive loss	$	(5,335	)	$	(603	)
Comprehensive income	$	10,733		$	17,770
Comprehensive income attributable to non-controlling interests	45			3
Comprehensive income attributable to MasTec, Inc.	$	10,688		$	17,767

The accompanying notes are an integral part of these condensed unaudited consolidated financial statements.

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MASTEC, INC.

CONDENSED UNAUDITED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share amounts)

	March 31, 2014			December 31, 2013
Assets
Current assets:
Cash and cash equivalents	$	9,261		$	22,927
Accounts receivable, net of allowance	1,195,603			1,134,577
Inventories, net	89,146			70,185
Prepaid expenses and other current assets, including discontinued operations (See Note 4)	63,926			78,534
Total current assets	$	1,357,936		$	1,306,223
Property and equipment, net	509,585			488,132
Goodwill	912,885			900,454
Other intangible assets, net	171,562			165,606
Other long-term assets, including discontinued operations (See Note 4)	61,439			60,552
Total assets	$	3,013,407		$	2,920,967
Liabilities and Equity
Current liabilities:
Current maturities of long-term debt	$	52,949		$	51,376
Accounts payable	440,152			424,917
Accrued salaries and wages	68,055			66,455
Other accrued expenses	60,581			71,448
Acquisition-related contingent consideration, current	64,694			64,747
Billings in excess of costs and earnings	109,370			121,641
Other current liabilities, including discontinued operations (See Note 4)	24,588			26,162
Total current liabilities	$	820,389		$	826,746
Acquisition-related contingent consideration, net of current portion	119,756			112,370
Long-term debt	841,335			765,425
Long-term deferred tax liabilities, net	154,151			155,012
Other liabilities	40,929			40,357
Total liabilities	$	1,976,560		$	1,899,910
Commitments and contingencies (See Note 16)
Equity:
Preferred stock, $1.00 par value; authorized shares - 5,000,000; issued and outstanding shares – none	$	—		$	—
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			8,672
Capital surplus	827,863			822,836
Contributed shares (See Note 11)	6,002			6,002
Retained earnings	357,887			341,864
Accumulated other comprehensive loss	(18,621		)	(13,286		)
Treasury stock, at cost; 9,467,286 shares as of both March 31, 2014 and December 31, 2013	(150,000		)	(150,000		)
Total MasTec, Inc. shareholders’ equity	$	1,031,831		$	1,016,088
Non-controlling interests	$	5,016		$	4,969
Total equity	$	1,036,847		$	1,021,057
Total liabilities and equity	$	3,013,407		$	2,920,967

The accompanying notes are an integral part of these condensed unaudited consolidated financial statements.

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MASTEC, INC.

CONDENSED UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	For the Three Months Ended March 31,
	2014			2013
Cash flows from operating activities:
Net income	$	16,068		$	18,373
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	33,494			31,753
Non-cash interest expense, including write-off of deferred financing costs on redeemed debt	2,362			3,747
Non-cash stock-based compensation expense	3,260			2,357
Excess tax benefit from stock-based compensation	(3,246		)	(903		)
Provision for deferred income taxes	3,281			(3,626		)
Provision for losses on construction projects, net	108			(252		)
Provision for losses on operating assets	623			3,584
(Gains) losses on sales of assets	(1,622		)	(683		)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(43,440		)	(28,497		)
Inventories	(13,313		)	12,167
Other assets, current and non-current portion	9,034			6,978
Accounts payable and accrued expenses	(14,683		)	(4,844		)
Billings in excess of costs and earnings	(12,247		)	(19,596		)
Book overdrafts	1,266			(5,970		)
Other liabilities, current and non-current portion	(1,339		)	11,542
Net cash (used in) provided by operating activities	$	(20,394	)	$	26,130
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	(23,831		)	(4,653		)
Capital expenditures	(35,554		)	(25,851		)
Proceeds from sale of property and equipment	3,373			3,411
Payments for other investments	(1,098		)	—
Net cash used in investing activities	$	(57,110	)	$	(27,093	)
Cash flows provided by (used in) financing activities:
Proceeds from credit facility	233,872			231,600
Repayments of credit facility	(157,349		)	(365,600		)
Proceeds from issuance of senior notes	—			400,000
Repayment of senior notes	—			(150,000		)
Repayments of other borrowings	(2,830		)	(11,429		)
Payments of capital lease obligations	(10,956		)	(7,692		)
Payments of tax withholdings and proceeds from stock-based awards, net	(1,451		)	2,554
Excess tax benefit from stock-based compensation	3,246			903
Payments of acquisition-related contingent consideration	—			(5,003		)
Payments of financing costs, including call premiums on extinguishment of debt	(218		)	(10,968		)
Net cash provided by financing activities	$	64,314		$	84,365
Net (decrease) increase in cash and cash equivalents	(13,190		)	83,402
Net effect of currency translation on cash	(476		)	(60		)
Cash and cash equivalents - beginning of period	22,927			26,767
Cash and cash equivalents - end of period	$	9,261		$	110,109
Cash and cash equivalents of discontinued operations	$	—		$	862
Cash and cash equivalents of continuing operations	$	9,261		$	109,247

Supplemental cash flow information:
Interest paid	$	12,430	$	10,720
Income taxes paid, net of refunds	$	11,928	$	8,245
Supplemental disclosure of non-cash information:
Equipment acquired under capital lease	$	8,240	$	23,002
Equipment acquired under financing arrangements	$	5,780	$	14,569
Value of acquisition-related contingent consideration	$	8,700	$	—

The accompanying notes are an integral part of these condensed unaudited consolidated financial statements.

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MASTEC, INC.

NOTES TO THE CONDENSED UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Note 1 – Business, Basis of Presentation and Significant Accounting Policies

Nature of the Business

MasTec, Inc. (collectively with its subsidiaries, “MasTec” or the “Company”) is a leading infrastructure construction company operating mainly throughout North America across a range of industries. The Company’s primary activities include the engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure, such as: petroleum and natural gas pipeline infrastructure; wireless, wireline and satellite communications; electrical utility transmission and distribution; power generation; and industrial infrastructure. MasTec’s customers are in these industries. MasTec reports its results in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial; and (5) Other. See Note 15 - Segments and Related Information.

Basis of Presentation

The accompanying condensed unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The accompanying condensed consolidated balance sheet as of December 31, 2013 is derived from the Company’s audited financial statements as of that date. Because certain information and footnote disclosures have been condensed or omitted, these condensed unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2013 contained in the Company’s most recent Annual Report on Form 10-K. In management’s opinion, all normal and recurring adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented have been included. Certain prior year amounts have been reclassified to conform to the current period presentation. Interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. The Company believes that the disclosures made in these condensed unaudited consolidated financial statements are adequate to make the information not misleading.

Principles of Consolidation

The accompanying condensed unaudited consolidated financial statements include MasTec, Inc. and its subsidiaries and include the accounts of all majority owned subsidiaries over which the Company exercises control and, when applicable, entities in which the Company has a controlling financial interest. Other parties’ interests in companies for which MasTec exercises control and has a controlling financial interest are reported as non-controlling interests within equity. Net income or loss attributable to non-controlling interests is reported as a separate line item below net income. The Company’s investments in entities in which the Company does not have a controlling interest, but has the ability to exert significant influence, are accounted for using the equity method of accounting. Equity method investments are recorded as long-term assets in the condensed unaudited consolidated balance sheets. Income or loss from these investments is recorded in other income or expense, net, in the condensed unaudited consolidated statements of operations. The cost method is used for investments in entities in which the Company does not have the ability to exert significant influence. All significant intercompany balances and transactions have been eliminated in consolidation. The assets and liabilities of foreign subsidiaries are translated into U.S. dollars at period-end exchange rates, with resulting translation gains or losses accumulated within other comprehensive income or loss. Revenue and expenses are translated into U.S. dollars at average rates of exchange prevailing during the applicable period. Gains or losses resulting from transactions executed in a foreign currency are included in other income or expense, net. The Company does not currently have any subsidiaries that operate in highly inflationary environments. The results of operations and financial position of any discontinued operations are aggregated and presented separately from the Company's continuing operations in the condensed unaudited consolidated financial statements for all periods presented.

Management Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Key estimates include: the recognition of revenue, in particular, on long-term construction contracts, including estimates of costs to complete projects and provisions for contract losses; allowances for doubtful accounts; accrued self-insured claims; estimated fair values of goodwill and intangible assets, acquisition-related contingent consideration, assets and liabilities classified as held-for-sale, convertible debt obligations and investments in cost and equity method investees; asset lives used in computing depreciation and amortization, including amortization of intangible assets; share-based compensation; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that such estimates are fair when considered in conjunction with the consolidated financial position and results of operations taken as a whole, actual results could differ from those estimates and such differences may be material to the condensed unaudited consolidated financial statements.

Significant Accounting Policies

Revenue Recognition

Revenues are derived from projects performed under master and other service agreements as well as from fixed price contracts for specific projects or jobs requiring the construction and installation of an entire infrastructure system or specified units within an entire infrastructure system. Revenue and related costs for master and other service agreements billed on a time and materials basis are recognized as the services are rendered. The Company also performs services under master and other service agreements on a fixed fee basis, under which MasTec furnishes specified units

7

of service for a fixed price per unit of service and revenue is recognized as the services are rendered. Revenues from fixed price contracts provide for a fixed amount of revenue for the entire project, subject to certain additions for changed scope or specifications. Revenues from these contracts are recognized using the percentage-of-completion method. Under this method, the percentage of revenue to be recognized for a given project is measured by the percentage of costs incurred to date on the contract to the total estimated costs for the contract. Such contracts provide that the customer accept completion of progress to date and compensate the Company for services rendered, which may be measured in terms of costs incurred, units installed, hours expended or some other measure of progress.

The Company may incur costs subject to change orders, whether approved or unapproved by the customer, and/or claims related to certain contracts. Management determines the probability that such costs will be recovered based upon evidence such as engineering studies and legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer. The Company treats project costs as a cost of contract performance in the period incurred if it is not probable that the costs will be recovered, or defers costs and/or recognizes revenue up to the amount of the related cost if it is probable that the contract price will be adjusted and can be reliably estimated. As of March 31, 2014 and December 31, 2013, the Company had approximately $163 million and $79 million, respectively, of change orders and/or claims that had been included as contract price adjustments on certain contracts that were in the process of being negotiated in the normal course of business, including arbitration and other proceedings. These contract price adjustments represent management's best estimate of additional contract revenues that have been earned and that management believes are probable of collection. The amounts ultimately realized upon final acceptance by its customers could be higher or lower than such estimated amounts, which are primarily expected to be billed and collected within one year. The $84 million increase in change orders and/or claims since December 31, 2013 is primarily due to a project in our Oil and Gas segment, which amounts have been approved in principle subsequent to March 31, 2014.

Except for adoption of the accounting pronouncement discussed below, there have been no material changes to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

New Accounting Pronouncements

Accounting Standards Not Yet Adopted

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”). ASU 2014-08 changes the requirements for reporting discontinued operations and requires additional disclosures about discontinued operations. Only disposals of components of an entity representing a strategic shift that has, or will have, a major effect on an entity’s operations and financial results should be reported as discontinued operations under ASU 2014-08. Examples include a disposal of a major geographical area, a major line of business, or a major equity method investment. ASU 2014-08 also requires expanded disclosures about discontinued operations and requires disclosures about individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. The Company is currently evaluating the potential impact of this ASU on its condensed unaudited consolidated financial statements.

Recently Adopted Accounting Pronouncements

In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force) (“ASU 2013-11”).  ASU 2013-11 provides guidance on the presentation in the financial statements of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, and explains that unrecognized tax benefits should be presented as a reduction to deferred tax assets for net operating loss carryforwards, similar tax losses or tax credit carryforwards. To the extent a net operating loss carryforward, similar tax loss or tax credit carryforward is not available as of the reporting date under the tax law of the applicable jurisdiction, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists as of the reporting date. ASU 2013-11 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Retrospective application is permitted. The Company adopted ASU 2013-11 as of January 1, 2014. The adoption of this ASU did not have a material impact on the condensed unaudited consolidated financial statements.

Note 2 – Earnings Per Share

Basic earnings per share is computed by dividing earnings available to MasTec’s common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share is computed by dividing earnings by the number of fully diluted shares, which includes the effect of dilutive potential issuances of common shares as determined using earnings from continuing operations. The potential issuance of common shares upon the exercise, conversion or vesting of outstanding stock options and unvested restricted share awards, as calculated under the treasury stock method, as well as shares associated with the Company’s outstanding convertible debt securities, may be dilutive.

The following table provides details underlying the Company’s earnings per share calculations for the periods indicated (in thousands):

8

	For the Three Months Ended March 31,
	2014			2013
Net income attributable to MasTec:
Net income, continuing operations - basic (a)	$	16,145		$	19,317
Interest expense, net of tax, 2009 Convertible Notes	78			77
Net income, continuing operations - diluted	$	16,223		$	19,394
Net loss from discontinued operations - basic and diluted (a)	(122		)	(947		)
Net income attributable to MasTec - diluted	$	16,101		$	18,447
Weighted average shares outstanding:
Weighted average shares outstanding - basic	77,345			76,608
Dilutive common stock equivalents	850			785
Dilutive premium shares, 2011 Convertible Notes	7,621			5,895
Dilutive shares, 2009 Convertible Notes	806			806
Weighted average shares outstanding - diluted	86,622			84,094

(a) Calculated as total net income less amounts attributable to non-controlling interests.

Outstanding Convertibles Notes - Diluted Share Impact

The Company has $215 million aggregate principal amount of senior convertible notes outstanding, composed of $202.3 million of senior convertible notes issued in 2011 (the “2011 Convertible Notes”) and approximately $12.6 million of senior convertible notes issued in 2009 (the “2009 Convertible Notes”). Dilutive shares associated with the 2009 Convertible Notes are attributable to the underlying principal amounts. The number of common shares issuable upon conversion of the Company’s 2009 Convertible Notes is reflected in the calculation of weighted average diluted earnings per share for the corresponding periods by application of the “if-converted” method to the extent its effect on the computation of earnings per share from continuing operations is dilutive. Under the “if-converted” method, net income from continuing operations is adjusted to add back the after-tax amount of interest recognized for the period associated with the convertible notes, and correspondingly, the convertible notes are assumed to have been converted with the resulting common shares added to the number of weighted average shares outstanding.Due to the optional cash settlement feature of the 2011 Convertible Notes and the Company's intent to settle the principal amount of such notes in cash, the conversion shares underlying the outstanding principal amount of the 2011 Convertible Notes, totaling approximately 13.0 million shares, are not required to be included in the Company's diluted share count. If, however, the average price per share of the Company's common stock exceeds the respective conversion prices of the 2011 Convertible Notes, then the resulting premium is translated into shares, referred to as “premium shares,” the number of which is required to be included in the Company's diluted share count. The number of premium shares included in our diluted share count varies with fluctuations in our share price. Higher share prices result in a greater number of premium shares. The Company’s weighted average share price for the three month periods ended March 31, 2014 and 2013 exceeded the conversion prices of the 2011 Convertible Notes, and as a result, dilutive premium shares have been included in the Company's share count for the corresponding periods.

The 2011 Convertible Notes consist of $105.3 million principal amount of 4.0% senior convertible notes, convertible at $15.76 per share (the “2011 4.0% Notes”), and $97.0 million principal amount of 4.25% senior convertible notes, convertible at $15.48 per share (the “2011 4.25% Notes”). The calculations underlying the number of premium shares included in the Company’s diluted share count for the periods indicated are as follows (in thousands, except per share amounts):

	As of and for the Three Months Ended March 31,
	2014				2013
Premium Share Information:	2011 4.0% Notes		2011 4.25% Notes		2011 4.0% Notes		2011 4.25% Notes
Number of conversion shares, principal amount	6,683		6,268		6,683		6,268
Weighted average actual per share price	$	37.96	$	37.96	$	28.68	$	28.68
Weighted average premium value	$	148,360	$	140,925	$	86,316	$	82,735
Weighted average equivalent premium shares	3,909		3,712		3,010		2,885

Diluted Shares, Other Information

For the three month period ended March 31, 2014, a total of 61,226 weighted average anti-dilutive common stock equivalents were not included in the Company's diluted earnings per share calculations. There were no anti-dilutive common stock equivalents for the three month period ended March 31, 2013.

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Note 3 – Acquisitions

Allocations of purchase prices for acquisitions are based on estimates of the fair value of consideration paid and of the net assets acquired and are subject to adjustment upon finalization of these fair value estimates. The Company acquired several businesses during 2013 and 2014, as discussed below and in Note 3 - Acquisitions in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013. As of March 31, 2014, the allocations of purchase price to the fair values of tangible and intangible assets and liabilities, including the estimated values of contingent earn-out obligations and the estimated useful lives of acquired assets for these acquisitions are provisional and remain preliminary. Management continues to assess the valuation of these items and any ultimate purchase price adjustments that may result based on the final net assets and net working capital of the acquired businesses, as prescribed in the corresponding purchase agreements.

The Company will revise its preliminary allocations for acquired businesses if new information is obtained about the facts and circumstances existing as of the date of acquisition, or for purchase price adjustments based on the final net assets and net working capital of the acquired businesses, as prescribed in the applicable purchase agreement. Such adjustments result in the recognition of, or adjust the fair values of, acquired assets and assumed liabilities, which results in the revision of comparative prior period financial information. These measurement period adjustments are presented as if the adjustments had been taken into account as of the date of acquisition. All changes that do not qualify as measurement period adjustments are included in current period results. See table below pertaining to measurement period adjustments associated with the Company's 2013 acquisitions.

2014 Acquisitions

Effective January 1, 2014, MasTec acquired a telecommunications services firm that specializes in the engineering, installation, furnishing and integration of telecommunications equipment for an aggregate purchase price composed of approximately $23.8 million in cash and a five year earn-out, valued at $8.7 million as of the date of acquisition. This company is included in MasTec's Communications segment.

2013 Acquisitions

Big Country

Effective May 1, 2013, MasTec acquired all of the issued and outstanding interests of Big Country Energy Services, Inc. and its affiliated operating companies (collectively, "Big Country").Big Country is a North American oil and gas pipeline and facility construction services company, headquartered in Calgary, Alberta, Canada.

Other 2013 Acquisitions

Effective April 1, 2013, MasTec acquired a former subcontractor to its wireless business, which provides self-perform communications tower construction, installation, maintenance and other services in support of telecommunications infrastructure construction in the Company's Communications segment. In addition, effective August 1, 2013, MasTec acquired an electrical transmission services company, which focuses primarily on substation construction activities and is included within the Company's Electrical Transmission segment.

Measurement Period Adjustments

Measurement period adjustments associated with the Company's 2013 acquisitions have been reflected in the Company's December 31, 2013 consolidated balance sheet as follows (in millions):

As of December 31, 2013	As Previously Reported		Measurement Period Adjustments		As Revised
Current assets	$	1,306.0	$	0.2	$	1,306.2
Goodwill	$	899.4	$	1.1	$	900.5
Current liabilities	$	825.5	$	1.2	$	826.7
Long-term deferred tax liabilities, net	$	154.9	$	0.1	$	155.0

Unaudited Pro Forma Information

The following unaudited supplemental pro forma financial information includes the results of operations of each of the companies acquired in 2014 and 2013 and is presented as if the acquired companies had been consolidated as of the beginning of the year immediately preceding the date of acquisition. The unaudited supplemental pro forma financial information has been provided for illustrative purposes only. The unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented, or of the results that may be achieved by the combined companies in the future. Future results may vary significantly from the results reflected in the following unaudited supplemental pro forma financial information because of future events and transactions, as well as other factors, many of which are beyond MasTec’s control.

The unaudited supplemental pro forma financial information presented below has been prepared by adjusting the historical results of MasTec to include the historical results of the acquired businesses described above. The unaudited supplemental pro forma combined historical

10

results were then adjusted (i) to remove one-time acquisition costs; (ii) to increase amortization expense resulting from the incremental intangible assets acquired in such acquisitions; (iii) to increase interest expense as a result of the cash consideration paid; and (iv) to reduce interest expense from the repayment of acquired debt. The unaudited supplemental pro forma financial information does not include any adjustments to reflect the impact of cost savings or other synergies that may result from these acquisitions. As noted above, the unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented or that may be achieved by the combined companies in the future.

	For the Three Months Ended March 31,
	2014		2013
Pro forma financial information:	(unaudited, in millions)
Revenue	$	964.0	$	1,029.1
Net income from continuing operations	$	16.2	$	24.1

Results of Businesses Acquired

Revenues and net income resulting from the year over year incremental impact of acquired businesses, which are included within the Company's consolidated results of operations for the years indicated, are as follows (in millions):

	For the Three Months Ended March 31,
	2014		2013
Year over year impact of acquired businesses:	(unaudited, in millions)
Revenue	$	119.8	$	43.1
Net income from continuing operations	$	1.0	$	1.8

The above results do not include acquisition costs of $0.2 million and $0.4 million for the three month periods ended March 31, 2014 and March 31, 2013, respectively. The above results also do not include interest expense associated with consideration paid for these acquisitions.

Note 4 – Discontinued Operations

Globetec

In 2012, the Company's board of directors approved a plan of sale for its Globetec business. Accordingly, Globetec's projects and assets are reflected as assets and liabilities of discontinued operations in the condensed unaudited consolidated balance sheets for all periods presented, and Globetec's results of operations are presented as discontinued operations in the condensed unaudited consolidated statements of operations for all periods presented. Effective August 31, 2013, the Company sold all of its membership interests in Globetec for nominal consideration and retained certain contingent assets and liabilities. Additionally, the Company has $15.9 million of outstanding surety bonds associated with Globetec as of March 31, 2014 for projects that Globetec has either completed or expects to complete in 2014. The expected cost to complete these projects was estimated to be $0.5 million as of March 31, 2014. The Company believes that there was an insignificant amount at risk under these surety bonds as of March 31, 2014. The Company is not obligated and does not intend to support Globetec in the future.

The following table contains a summary of the contingent assets and liabilities associated with Globetec that were retained by the Company as of March 31, 2014 and as of December 31, 2013 (in millions):

	March 31, 2014		December 31, 2013
Current assets	$	3.4	$	2.3
Long-term assets	10.1		10.1
Assets of discontinued operations	$	13.5	$	12.4
Current liabilities of discontinued operations	$	1.3	$	1.2

The following table presents results from discontinued operations associated with the Globetec operation for the periods indicated (in millions):

	For the Three Months Ended March 31, 2013
Revenue	$	6.3
Loss from operations, before tax	(1.2		)
Benefit from income taxes	0.3
Net loss from discontinued operations	$	(0.9	)

11

Note 5 - Goodwill and Other Intangible Assets

The following table provides a reconciliation of changes in goodwill by reportable segment (in millions):

	Communications		Oil and Gas			Electrical Transmission		Power Generation and Industrial		Total Goodwill
Balance as of December 31, 2013	$	327.9	$	305.2		$	149.8	$	117.6	$	900.5
Additions from new business combinations	14.5		—			—		—		14.5
Currency translation adjustments	—		(2.1		)	—		—		(2.1		)
Balance as of March 31, 2014	$	342.4	$	303.1		$	149.8	$	117.6	$	912.9

The following table provides a reconciliation of changes in other intangible assets (in millions):

	Other Intangible Assets
	Non-amortizing					Amortizing
	Trade Names		Pre-Qualifications			Customer Relationships and Backlog			Other (a)			Total
Other intangible assets, gross carrying amount as of December 31, 2013	$	34.8	$	59.4		$	128.4		$	22.5		$	245.1
Accumulated amortization						$	(67.7	)	$	(11.8	)	$	(79.5	)
Other intangible assets, net, as of December 31, 2013	$	34.8	$	59.4		$	60.7		$	10.7		$	165.6
Additions from new business combinations	—		—			11.7			0.3			12.0
Amortization expense						(4.2		)	(0.4		)	(4.6		)
Currency translation adjustments	—		(1.1		)	(0.2		)	(0.1		)	(1.4		)
Other intangible assets, net, as of March 31, 2014	$	34.8	$	58.3		$	68.0		$	10.5		$	171.6

(a) Consists principally of trade names and non-compete agreements.

Amortization expense associated with intangible assets for the three month periods ended March 31, 2014 and 2013 totaled $4.6 million and $4.2 million, respectively.

Note 6 – Fair Value of Financial Instruments

The Company’s financial instruments include cash and cash equivalents, accounts and notes receivable, cash collateral deposited with insurance carriers, life insurance assets, cost and equity method investments, deferred compensation plan assets and liabilities, accounts payable and other current liabilities, acquisition-related contingent consideration and debt obligations.

Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value guidance establishes a valuation hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:

Level 1 - Quoted market prices in active markets for identical assets or liabilities.

Level 2 - Observable market based inputs or other observable inputs.

Level 3 - Significant unobservable inputs that cannot be corroborated by observable market data. These values are generally determined using valuation models incorporating management’s estimates of market participant assumptions.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

As of March 31, 2014, the Company held certain assets and liabilities required to be measured at fair value on a recurring basis. The fair value hierarchy requires the use of observable market data when available. In instances in which the inputs used to measure fair value fall into different levels of the fair value hierarchy, the fair value measurement classification below has been determined based on the lowest level input that is significant to the fair value measurement in its entirety.  Management’s assessment of the significance of a particular item to the fair value measurement in its entirety requires judgment, including the consideration of inputs specific to the asset or liability.  The fair values of financial assets and liabilities measured on a recurring basis were determined using the following inputs as of the dates indicated (in millions):

12

			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of March 31, 2014		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.5	$	5.5
Liabilities
Acquisition-related contingent consideration	$	170.3				$	170.3
			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2013		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.3	$	5.3
Liabilities
Acquisition-related contingent consideration	$	162.9				$	162.9

Life Insurance Surrender Values. Cash surrender values of life insurance policies are based on current cash surrender values as quoted by insurance carriers. Life insurance policies support the Company’s deferred compensation plan assets and certain of its split dollar agreements.

Acquisition-Related Contingent Consideration. Acquisition-related contingent consideration presented in the table above represents the estimated fair value of additional future earn-outs payable for acquisitions of businesses that closed after January 1, 2009, in accordance with U.S. GAAP. The fair value of such acquisition-related contingent consideration is based on management’s estimates and entity-specific assumptions and is evaluated on an on-going basis. Additions to acquisition-related contingent consideration totaled $8.7 million for the three month period ended March 31, 2014. There were no additions for the three month period ended March 31, 2013. The Company made no payments in connection with acquisition-related contingent consideration obligations measured at fair value on a recurring basis for the three months ended March 31, 2014. The Company paid approximately $0.6 million for the three month period ended March 31, 2013. Foreign currency translation gains included in other comprehensive income totaled $1.4 million and $0.4 million for the three month periods ended March 31, 2014 and 2013, respectively.

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

Assets and liabilities recognized or disclosed at fair value on a non-recurring basis, which are initially measured at fair value, and are subsequently remeasured in the event of an impairment or other measurement event, if applicable, include items such as cost and equity method investments, goodwill, other intangible assets, long-lived assets and debt.

Carrying amounts and estimated fair values of selected financial instruments measured on a non-recurring basis as of the dates indicated were as follows (in millions):     

	March 31, 2014				December 31, 2013
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
4.875% Senior Notes	$	400.0	$	390.5	$	400.0	$	380.0
2009 Convertible Notes	$	12.6	$	35.0	$	12.6	$	26.6
2011 Convertible Notes	$	199.7	$	563.2	$	198.3	$	428.3

The estimated fair values of the Company’s 4.875% Senior Notes, 2009 Convertible Notes and 2011 Convertible Notes are based on quoted market prices, a Level 1 input.

13

Note 7 - Accounts Receivable, Net of Allowance

The following table provides details of accounts receivable, net of allowance, as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Contract billings	$	627.1		$	606.5
Retainage	135.6			159.3
Costs and earnings in excess of billings	448.6			384.6
Accounts receivable, gross	$	1,211.3		$	1,150.4
Less allowance for doubtful accounts	(15.7		)	(15.8		)
Accounts receivable, net	$	1,195.6		$	1,134.6

Provisions for doubtful accounts were $0.6 million and $3.3 million, respectively, for the three month periods ended March 31, 2014 and March 31, 2013.

Note 8 - Property and Equipment, Net

The following table provides details of property and equipment, net, including property and equipment held under capital leases as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Land	$	4.6		$	4.8
Buildings and leasehold improvements	17.6			18.0
Machinery and equipment	752.2			727.1
Office furniture and equipment	108.0			102.5
Construction in progress	16.9			11.0
Total property and equipment	$	899.3		$	863.4
Less accumulated depreciation and amortization	(389.7		)	(375.3		)
Property and equipment, net	$	509.6		$	488.1

Depreciation and amortization expense associated with property and equipment for the three month periods ended March 31, 2014 and 2013 totaled $28.9 million and $27.6 million, respectively.

Note 9 - Debt

The following table provides details of the carrying values of debt as of the dates indicated (in millions):

Description	Maturity Date	March 31, 2014			December 31, 2013
Credit facility	October 29, 2018	$	128.6		$	53.0
4.875% senior notes	March 15, 2023	400.0			400.0
2011 4.0% senior convertible notes	June 15, 2014	104.6			103.8
2011 4.25% senior convertible notes	December 15, 2014	95.1			94.5
2009 4.0% senior convertible notes	June 15, 2014	9.6			9.6
2009 4.25% senior convertible notes	December 15, 2014	3.0			3.0
Capital lease obligations, weighted average interest rate of 2.9%	In installments through March 30, 2020	123.2			126.0
Notes payable for equipment, weighted average interest rate of 3.0%	In installments through May 1, 2018	30.1			26.9
Total debt		$	894.2		$	816.8
Less current maturities		(52.9		)	(51.4		)
Long-term debt		$	841.3		$	765.4

14

Credit Facility

The Company has a senior secured credit facility, referred to as the 2013 Credit Facility. The 2013 Credit Facility matures on October 29, 2018 and has a maximum available borrowing capacity of $750 million, of which up to $100 million may be borrowed in Canadian dollars. As of March 31, 2014 and December 31, 2013, the Company had outstanding revolving loans under the 2013 Credit Facility of $128.6 million and $53.0 million, respectively, which accrued interest at a weighted average rate of approximately 2.08% and 2.14% per annum, respectively. Letters of credit of approximately $134.7 million and $134.8 million were outstanding as of March 31, 2014 and December 31, 2013, respectively. The remaining borrowing capacity of $486.8 million and $562.1 million as of March 31, 2014 and December 31, 2013, respectively, was available for revolving loans, or up to $315.3 million and $315.2 million, respectively, of new letters of credit. Outstanding letters of credit mature at various dates and most have automatic renewal provisions, subject to prior notice of cancellation. As of March 31, 2014 and December 31, 2013, interest on outstanding letters of credit accrued at 0.75% per annum for performance standby letters of credit and at 1.50% per annum for financial standby letters of credit. The unused facility fee was 0.30%as of both March 31, 2014 and December 31, 2013. The 2013 Credit Facility is guaranteed by certain subsidiaries of the Company.

For additional information regarding the Company's 2013 Credit Facility see Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Senior Convertible Notes

Unamortized debt discount and financing costs associated with the Company's 2011 Convertible Notes totaled $2.7 million and $4.0 million as of March 31, 2014 and December 31, 2013, respectively. The 4.0% senior convertible notes mature in June 2014 and the 4.25% senior convertible notes mature in December 2014. The Company expects to refinance the $215.0 million principal amount of its senior convertible notes on a long-term basis either through its 2013 Credit Facility or through other sources of available funding and, therefore, has reflected the carrying amounts of these notes within long-term debt in the Company's condensed unaudited consolidated balance sheets.

For additional information regarding the Company's senior convertible notes, see Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Debt Guarantees and Covenants

The Company’s 4.875% Senior Notes, 2011 Convertible Notes and 2009 Convertible Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of the 2013 Credit Facility or other outstanding indebtedness. See Note 18 - Supplemental Guarantor Condensed Unaudited Consolidating Financial Information.

MasTec was in compliance with all provisions and covenants pertaining to its outstanding debt instruments as of March 31, 2014 and December 31, 2013.

Interest Expense, Net

The following table provides details of interest expense, net, for the periods indicated (in millions):

	For the Three Months Ended March 31,
	2014		2013
Interest expense:
Contractual and other interest expense	$	9.7	$	7.9
Accretion of senior convertible note discount	1.4		1.3
Amortization of deferred financing costs	0.9		0.9
Total interest expense	$	12.0	$	10.1
Interest income	0.0		(0.1		)
Interest expense, net	$	12.0	$	10.0

Note 10 - Lease Obligations

Capital Leases

MasTec enters into agreements that provide financing for machinery and equipment, which expire on various dates. The gross amount of assets held under capital leases as of March 31, 2014 and December 31, 2013 totaled $207.8 million and $199.6 million, respectively. Assets held under capital leases, net of accumulated depreciation, totaled $144.1 million and $141.3 million as of March 31, 2014 and December 31, 2013, respectively.

15

Operating Leases

In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facility, vehicle and equipment needs, including related party leases. Rent expense relating to operating leases that have non-cancelable terms in excess of one year was approximately $15.5 million and $11.9 million for the three month periods ended March 31, 2014 and 2013, respectively. The Company also incurred expenses relating to facilities, vehicles and equipment having original terms of one year or less of approximately $48.4 million and $36.9 million for the three month periods ended March 31, 2014 and 2013, respectively.

Note 11 – Stock-Based Compensation and Other Employee Benefit Plans

The Company has certain stock-based compensation plans, under which stock options and restricted share awards are available for issuance or outstanding. Under stock-based compensation plans in effect as of March 31, 2014, there were a total of 6,243,047 shares available for grant or issuance.

Restricted Share Awards

MasTec grants restricted share awards, which are valued based on the market price of MasTec common stock on the date of grant. Total unearned compensation related to restrictedshare awards as ofMarch 31, 2014was approximately$24.3 million, which is expected to be recognized over a weighted average period of approximately1.6years. The total intrinsic value, or fair value, of restricted share awards that vested, which is based on the market price on the date of vesting, was $5.9 million and $0.7 million for the three month periods ended March 31, 2014 and 2013.

Activity, restricted share awards:	Restricted Shares		Weighted Average Grant Date Fair Value
Non-vested restricted shares, as of December 31, 2013	1,123,545		$	23.78
Granted	326,442		41.39
Vested	(141,138	)	19.41
Canceled/forfeited	(13,450	)	16.05
Non-vested restricted shares, as of March 31, 2014	1,295,399		$	28.77

Stock Options

The Company has granted options to purchase its common stock to employees and members of the Board of Directors and affiliates under various stock option plans at not less than the fair market value of the underlying stock on the date of grant. All outstanding stock options are fully vested.

Activity, stock options:	StockOptions		Per Share Weighted AverageExercise Price		Weighted Average Remaining Contractual Life(in years)	Aggregate Intrinsic Value (a)(in millions)
Options outstanding as of December 31, 2013	495,571		$	11.17	1.96	$	10.7
Exercised	(200,900	)	9.77
Canceled/forfeited	—		—
Options outstanding as of March 31, 2014	294,671		$	12.13	2.04	$	9.2
Options exercisable as of March 31, 2014	294,671		$	12.13	2.04	$	9.2

(a) Amount represents the difference between the exercise price and the market price of the Company’s stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.

The total intrinsic value of options exercised during the three month periods ended March 31, 2014 and 2013, which is based on the difference between the exercise price and the market price of the Company’s stock at the date of exercise, was $6.3 million and $3.5 million, respectively. Proceeds from options exercised during the three month periods ended March 31, 2014 and 2013 totaled $0.6 million and $1.9 million, respectively.

Employee Stock Purchase Plans

The Company's employee stock purchase plans allow qualified employees to purchase MasTec, Inc. common stock at 85% of the fair market value of the common stock at the lower of (i) the date of commencement of the offering period or (ii) the last day of the exercise period, as defined in the plan documents.The fair value of purchases under the Company's employee stock purchase plans is estimated using the Black-Scholes option-pricing valuation model.

16

	Three Months Ended March 31,
Activity, employee stock purchase plan:	2014		2013
Cash proceeds (in millions)	$	0.8	$	0.9
Common shares issued	26,968		67,556
Weighted average price per share	$	27.81	$	13.19
Weighted average grant date fair value per share	$	6.59	$	5.00

Stock-Based Compensation Expense and Tax Benefits

Details of stock based compensation expense, which is included within general and administrative expense in the condensed unaudited consolidated statement of operations, and related tax benefits for the periods indicated are as follows (in millions):

	Three Months Ended March 31,
	2014		2013
Stock-based compensation expense	$	3.3	$	2.4
Income Tax Effects:
Income tax benefit from stock-based compensation	$	4.5	$	1.5
Excess tax benefit from stock-based compensation (a)	$	3.2	$	0.9

(a) Excess tax benefits, which represent cash flows from tax deductions in excess of the recorded tax effect of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

Note 12 – Other Retirement Plans

Multi-Employer Plans. Certain of MasTec’s subsidiaries contribute amounts to multi-employer pension and other multi-employer benefit plans and trusts. Contributions are generally based on fixed amounts per hour per employee for employees covered under these plans. Multi-employer plan contribution rates are determined annually and assessed on a “pay-as-you-go” basis based on union employee payrolls. Union payrolls cannot be determined for future periods because the number of union employees employed at any given time, and the plans in which they may participate, vary depending upon the location and number of ongoing projects at a given time and the need for union resources in connection with those projects. Total contributions to multi-employer plans, and the related number of employees covered by these plans, for the periods indicated ranged as follows:

	Multi-Employer Plans
	Covered Employees		Contributions (in millions)
For the Three Months Ended March 31,	Low	High	Pension		Post-Retirement Benefit		Total
2014	1,098	1,308	$	7.8	$	0.5	$	8.3
2013	778	1,149	$	8.3	$	0.8	$	9.1

Note 13 – Equity

The following is a summary of share activity for the period indicated:

Share Activity (in thousands):	Common Shares Outstanding		Treasury Shares
Balance as of December 31, 2013	77,258		9,467
Shares issued for stock option exercises	201
Shares issued for restricted stock awards	141
Other shares issued, net of shares withheld for taxes	(73	)
Balance as of March 31, 2014	77,527		9,467

17

Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss by component during the periods indicated are as follows (in thousands):

	For the Three Months Ended March 31,
	2014									2013
	Unrealized (Losses) Gains
	Foreign Currency			Available-for-Sale Securities			Total			Foreign Currency			Available-for-Sale Securities			Total
Balance as of January 1	$	(7,998	)	$	(5,288	)	$	(13,286	)	$	(105	)	$	(5,396	)	$	(5,501	)
Activity before reclassifications, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Reclassifications, net of tax	—			—			—			—			—			—
Activity, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Balance as of March 31	$	(13,333	)	$	(5,288	)	$	(18,621	)	$	(929	)	$	(5,175	)	$	(6,104	)

Foreign currency activity is primarily related to the Company's Canadian operations. The Company's Canadian presence has grown in recent years due to acquisitions. See Note 3 - Acquisitions.

Note 14 - Income Taxes

The Company’s consolidated tax rates on income from continuing operations for the three month periods ended March 31, 2014 and 2013 were 38.0% and 39.0%, respectively. In determining the quarterly provision for income taxes, management uses an estimated annual effective tax rate based on forecasted annual pre-tax income, permanent tax differences, statutory tax rates and tax planning opportunities in the various jurisdictions in which the Company operates. The impact of significant discrete items is separately recognized in the quarter(s) in which they occur.

As of March 31, 2014, the Company had $12.7 million of current deferred tax assets, net, and $154.2 million of long-term deferred tax liabilities, net. As of December 31, 2013, current deferred tax assets, net, totaled $16.3 million and long-term deferred tax liabilities, net, totaled $155.0 million.

Note 15 - Segments and Related Information    

Segment Discussion

MasTec presents its continuing operations in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. This structure is generally focused on broad end-user markets for MasTec's labor-based construction services.All five reportable segments derive their revenues from the engineering, installation and maintenance of infrastructure, primarily in North America.

The Communications segment performs engineering, construction and maintenance of communications infrastructure primarily related to wireless and wireline communications and install to the home, and to a lesser extent, infrastructure for electrical utilities.MasTec performs engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries through its Oil and Gas segment.The Electrical Transmission segment primarily serves the energy and utility industries through the engineering, construction and maintenance of electrical transmission lines and substations.The Power Generation and Industrial segment primarily serves the energy and utility end markets and other end markets through the installation and construction of renewable power facilities, related electrical transmission infrastructure, ethanol facilities and various types of industrial infrastructure.The Other segment primarily includes small business units that perform construction services for a variety of end markets in Mexico and elsewhere internationally.

Earnings before interest, taxes, depreciation and amortization (“EBITDA”) is the measure of profitability used by management to manage its segments and, accordingly, in its segment reporting. As appropriate, the Company supplements the reporting of consolidated financial information determined in accordance with U.S. GAAP with certain non-U.S. GAAP financial measures, including EBITDA. The Company believes these non-U.S. GAAP measures provide meaningful information that helps investors understand the Company's financial results and assess its prospects for future performance. The Company uses EBITDA to evaluate its performance, both internally and versus that of its peers, because it excludes certain items that may not be indicative of the Company's reportable segment results, as well as items that can vary widely across different industries or among companies within the same industry. Segment EBITDA is calculated in a manner consistent with consolidated EBITDA.

Summarized financial information for MasTec’s reportable segments is presented and reconciled to consolidated continuing operations financial information for total MasTec in the following tables (in millions):

	For the Three Months Ended March 31,
Revenue:	2014		2013
Communications	$	447.1	$	424.9
Oil and Gas	379.8		318.8
Electrical Transmission	80.1		84.6
Power Generation and Industrial	54.2		88.9
Other	2.8		2.3
Eliminations	0.0		(0.9		)
Consolidated revenue	$	964.0	$	918.6

Revenue generated by utilities customers represented 7.0% and 8.3% of Communications segment revenue for the three month periods ended March 31, 2014 and 2013, respectively.

	For the Three Months Ended March 31,
EBITDA:	2014			2013
Communications	$	43.4		$	46.4
Oil and Gas	34.9			42.4
Electrical Transmission	3.5			3.4
Power Generation and Industrial	0.5			(0.2		)
Other	0.2			0.1
Corporate	(10.9		)	(18.6		)
Consolidated EBITDA	$	71.6		$	73.5

	For the Three Months Ended March 31,
Depreciation and Amortization:	2014		2013
Communications	$	9.9	$	8.2
Oil and Gas	18.1		18.7
Electrical Transmission	2.8		2.3
Power Generation and Industrial	1.5		1.7
Corporate	1.2		0.9
Consolidated Depreciation and Amortization	$	33.5	$	31.8

The following table presents a reconciliation of EBITDA to consolidated income from continuing operations before income taxes (in millions):

	For the Three Months Ended March 31,
EBITDA Reconciliation:	2014			2013
EBITDA	$	71.6		$	73.5
Less:
Interest expense, net	(12.0		)	(10.0		)
Depreciation and amortization	(33.5		)	(31.8		)
Income from continuing operations before income taxes	$	26.1		$	31.7

Foreign Operations. MasTec operates throughout North America, primarily in the United States and Canada, as well as in parts of Latin America. For the three months ended March 31, 2014 and 2013, revenues of $837.9 million and $878.9 million, respectively, were derived in the United States, and $126.1 million and $39.7 million, respectively, were derived from foreign operations. Long-lived assets held in the United States include property and equipment, net, of $461.8 million and $436.9 million as of March 31, 2014 and December 31, 2013, respectively. Long-lived assets held in foreign countries, primarily in Canada, include property and equipment, net, of $47.8 million and $51.2 million as of March 31, 2014 and December 31, 2013, respectively. Intangible assets and goodwill, net of $995.8 million and $973.3 million as of March 31, 2014 and December 31, 2013, respectively, relate to businesses in the United States. Intangible assets and goodwill, net, of $88.6 million and $92.7 million as of March 31, 2014 and December 31, 2013, respectively, relate to businesses in foreign countries.

19

Significant Customers

Revenue concentration information for significant customers as a percent of total consolidated revenue was as follows:

	For the Three Months Ended March 31,
	2014	2013
Customer:
AT&T	22%	18%
DIRECTV®	14%	16%
Enbridge, Inc.	14%	12%

The Company's relationship with AT&T is based upon master service agreements, other service agreements and construction/installation contracts for AT&T's wireless, wireline and home security and automation businesses. Revenue from AT&T is included in the Communications segment.The Company's relationship with DIRECTV® is based upon an agreement to provide installation and maintenance services for DIRECTV®. Revenue from DIRECTV® is included in the Communications segment.The Company's relationship with Enbridge, Inc. is based upon various construction contracts for natural gas pipelines. Revenue from Enbridge, Inc. is included in the Oil and Gas segment.

Note 16 - Commitments and Contingencies

In addition to the matters discussed below, MasTec is subject to a variety of legal cases, claims and other disputes that arise from time to time in the ordinary course of its business. MasTec cannot provide assurance that it will be successful in recovering all or any of the potential damages it has claimed or in defending claims against it. The outcome of such cases, claims and disputes (including the one set forth below) cannot be predicted with certainty and an unfavorable resolution of one or more of them could have a material adverse effect on the Company's business, financial condition, results of operations, cash flows and the trading price of its common stock.

SunLight Entities. In 2011, Power Partners MasTec, LLC., a MasTec, Inc. subsidiary (“Power Partners”), entered into engineering, procurement, and construction agreements with special purpose entities, SunLight General Somerset Solar, LLC, SunLight General Morris Solar, LLC and SunLight General Sussex Solar, LLC (collectively, the “SunLight Entities”), respectively, to perform design and construction services for three public solar projects in New Jersey located in Somerset, Morris and Sussex Counties (the “Projects”). The initial contract price of each of the Projects was, subject to adjustment, approximately as follows: Somerset ($29 million); Morris ($36 million); and Sussex ($26 million). The Projects were funded on a project finance basis, including the proceeds of municipal bonds issued by the Morris County and Somerset Improvement Authorities (collectively, the “Authorities”).

Power Partners and the SunLight Entities commenced three separate arbitration proceedings against each other to address various disputes that presently exist between the parties on the three Projects. The parties allege, among other things, breach of contract against each other. The arbitrations began in January 2014 and an award is anticipated in the summer of 2014. Power Partners believes it has presented meritorious support of its claims against Sunlight and, additionally, believes that it has meritorious defenses against Sunlight’s claims. Power Partners is vigorously pursuing its claims against Sunlight and vigorously defending against Sunlight’s claims.

Power Partners filed municipal liens and construction liens of approximately $50 million for the work performed but the liens were challenged by the SunLight Entities and the Authorities. On March 24, 2014, the New Jersey appellate court found that Power Partners did not have municipal or construction liens on the proceeds of the municipal bonds. The New Jersey Supreme Court denied Power Partner’s emergency motion to stay the adverse ruling. The Company is currently petitioning the New Jersey Supreme Court to review the New Jersey appellate court’s adverse ruling.

Power Partners also filed a federal lawsuit in the United States District Court of New Jersey against the Authorities and the principals of the SunLight Entities in June 2013. The claims against the Authorities include violations of the New Jersey Public Works Bond Act and the New Jersey Construction Trust Fund Act, tortious interference and unjust enrichment and quantum meruit. The Authorities and the SunLight principals have filed motions to dismiss. Power Partners has filed a response to the motions to dismiss. The litigation is in the early stages.

Other Commitments and Contingencies

Leases. In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facility, vehicle and equipment needs, including related party leases. See Note 10 - Lease Obligations.

Letters of Credit. In the ordinary course of business, the Company is required to post letters of credit for its insurance carriers, surety bond providers and in support of performance under certain contracts. Such letters of credit are generally issued by a bank or similar financial institution. The letter of credit commits the issuer to pay specified amounts to the holder of the letter of credit under certain conditions. If this were to occur, the Company would be required to reimburse the issuer of the letter of credit, which, depending upon the circumstances, could result in a charge to earnings. As of March 31, 2014 and December 31, 2013, the Company had $134.7 million and $134.8 million, respectively, of letters of credit issued under its 2013 Credit Facility. The Company was not aware of any material claims relating to outstanding letters of credit as of March 31, 2014 or December 31, 2013.

20

Performance and Payment Bonds. In the ordinary course of business, MasTec is required by certain customers to provide performance and payment bonds for some of the Company’s contractual commitments related to projects in process. These bonds provide a guarantee to the customer that the Company will perform under the terms of a contract and that the Company will pay subcontractors and vendors. If the Company fails to perform under a contract or to pay subcontractors and vendors, the customer may demand that the surety make payments or provide services under the bond. The Company must reimburse the surety for any expenses or outlays it incurs. As of March 31, 2014, the estimated cost to complete projects secured by the Company’s $1.0 billion in performance and payment bonds was $281.6 million. As of December 31, 2013, the estimated cost to complete projects secured by the Company’s $1.1 billion in performance and payment bonds was $297.1 million.

Self-Insurance. MasTec maintains insurance policies for workers’ compensation, general liability and automobile liability, which are subject to per claim deductibles. The Company also maintains excess umbrella coverage. As of March 31, 2014 and December 31, 2013, MasTec’s liability for unpaid claims and associated expenses, including incurred but not reported losses related to its workers compensation, general liability and automobile liability insurance policies, was $50.9 million and $50.8 million, respectively, of which $32.0 million and $31.3 million, respectively, was reflected within non-current other liabilities in the condensed unaudited consolidated balance sheets. MasTec also maintains an insurance policy with respect to employee group medical claims, which is subject to annual per employee maximum losses. MasTec’s liability for employee group medical claims as of March 31, 2014 and December 31, 2013 was $1.9 million and $2.1 million, respectively.

The Company is required to post letters of credit and provide cash collateral to certain of its insurance carriers and to provide surety bonds in certain states. These letters of credit amounted to $57.4 million as of both March 31, 2014 and December 31, 2013. In addition, cash collateral deposited with insurance carriers, which is included in other long-term assets in the condensed unaudited consolidated balance sheets, amounted to $1.4 million as of both March 31, 2014 and December 31, 2013. Outstanding surety bonds related to workers’ compensation self-insurance programs amounted to $10.9 million as of both March 31, 2014 and December 31, 2013.

Employment Agreements. The Company has employment agreements with certain executives and other employees, which provide for compensation and certain other benefits and for severance payments under certain circumstances. Certain employment agreements also contain clauses that become effective upon a change of control of the Company. Upon the occurrence of any of the defined events in the various employment agreements, the Company would be obligated to pay certain amounts to the relevant employees, which vary with the level of the employees’ respective responsibility.

Collective Bargaining Agreements and Multi-Employer Plans.Certain of MasTec’s subsidiaries are party to various collective bargaining agreements with unions representing certain of their employees. The agreements require the subsidiaries party to the agreements to pay specified wages, provide certain benefits to their union employees and contribute certain amounts to multi-employer pension plans and employee benefit trusts. The collective bargaining agreements expire at various times and have typically been renegotiated and renewed on terms similar to the ones contained in the expiring agreements.

The Employee Retirement Income Security Act of 1974, as amended by the Multi-Employer Pension Plan Amendments Act of 1980 (collectively, “ERISA”), subjects employers to substantial liabilities in the event of the employer’s complete or partial withdrawal from, or upon termination of, such plans. Under current law regarding employers who are contributors to multi-employer defined benefit plans, a plan’s termination, an employer’s voluntary withdrawal from, or the mass withdrawal of all contributing employers from, an underfunded multi-employer defined benefit plan requires participating employers to make payments to the plan for their proportionate share of the multi-employer plan’s unfunded vested liabilities. Furthermore, the Pension Protection Act of 2006 added new funding rules generally applicable to plan years beginning after 2007 for multi-employer plans that are classified as “endangered,” “seriously endangered,” or “critical” status. If plans in which the Company’s subsidiaries participate are in critical status, benefit reductions may apply and/or the Company could be required to make additional contributions if the plans are determined to be underfunded. Based upon the information available to the Company from plan administrators as of March 31, 2014, several of the multi-employer pension plans in which the Company’s subsidiaries participate are underfunded and the Company could be required to increase its contributions to such plans.

On November 15, 2011, the Company, along with other members of the Pipe Line Contractors Association (“PLCA”), voluntarily withdrew from the Central States Southeast and Southwest Areas Pension Fund (“Central States”), a defined benefit multi-employer pension plan that is in critical status. In connection with this withdrawal, a $6.4 million withdrawal liability was established based on an estimate provided by the Central States administrator of such liability as of the date of withdrawal. The Company began paying installments towards this withdrawal liability in 2013, of which $5.1 million was outstanding as of March 31, 2014. The Company withdrew from Central States in order to mitigate its liability in connection with the plan; however, Central States has asserted that the PLCA members did not effectively withdraw in 2011 and are, therefore, responsible for a withdrawal liability that includes 2011 contribution amounts. By letter dated March 14, 2013, Central States demanded $11 million in withdrawal liability from the Company, which included 2011 contribution amounts. The Company is vigorously opposing this demand because it believes that it legally and effectively withdrew from Central States on November 15, 2011. If Central States were to prevail in its assertion that the Company withdrew after that date, then the initial amount of the Company’s withdrawal liability would increase to approximately $11 million. In addition, if Central States were to undergo a mass withdrawal, as defined by ERISA and the Pension Benefit Guaranty Corporation, within the three year period commencing with the beginning of the calendar year during which the Company withdrew from the plan, there could be additional liability. The Company currently does not have plans to withdraw from any other multi-employer pension plan.

Indemnities. The Company generally indemnifies its customers for the services it provides under its contracts, as well as other specified liabilities, which may subject the Company to indemnity claims, liabilities and related litigation. As of March 31, 2014 and December 31, 2013, the Company was not aware of any material asserted or unasserted claims in connection with these indemnity obligations.

Other Guarantees.In the ordinary course of its business, from time to time, MasTec guarantees the obligations of its subsidiaries, including obligations under certain contracts with customers, certain lease obligations and in some states, obligations in connection with obtaining contractors’ licenses.MasTec also generally warrants the work it performs for a one to two year period following substantial completion of a project. MasTec has not historically accrued any reserves for potential warranty claims as they have been immaterial.

21

Concentrations of Risk. The Company had approximately 290 customers as of March 31, 2014. For the three months ended March 31, 2014 and 2013, the Company derived 73% and 69%, respectively, of revenues from its top ten customers. See Note 15 - Segments and Related Information for significant customer revenue concentration information.

Note 17 - Related Party Transactions

MasTec purchases, rents and leases equipment used in its business from a number of different vendors on a non-exclusive basis, including Cross Country Pipeline Supply, Inc. (“CCP”), in which MasTec invested $15 million for a 14.85% ownership interest effective November 8, 2013. Juan Carlos Mas, who is the brother of Jorge Mas, Chairman of MasTec's Board of Directors, and Jose Mas, MasTec's Chief Executive Officer, serves as the chairman of CCP. In addition, an entity owned by the Mas family, including Jorge and Jose Mas, is a minority shareholder of CCP. MasTec paid CCP approximately $0.9 million for equipment rentals, leases and servicing for the three month period ended March 31, 2014.

MasTec leases employees to a customer, in which Jorge Mas and Jose Mas own a minority interest. For the three month periods ended March 31, 2014 and 2013, MasTec charged to the customer approximately $0.2 million and $0.1 million, respectively. As of both March 31, 2014 and December 31, 2013, receivables of $0.1 million attributable to this arrangement were outstanding. The Company also provides satellite communication services to this customer. For both of the three month periods ended March 31, 2014 and 2013, revenues relating to this customer were approximately $0.3 million. As of both March 31, 2014 and December 31, 2013, outstanding receivables from this arrangement totaled $0.4 million.        

Split Dollar and Deferred Bonus Agreements

MasTec has a split dollar agreement with Jorge Mas. The Company made no payments in connection with this agreement in either of the three month periods ended March 31, 2014 or 2013. MasTec also has a split dollar agreement and a deferred bonus agreement with Jose Mas. For the three month periods ended March 31, 2014 and 2013, no payments were made in connection with the agreements for Jose Mas. As of March 31, 2014 and December 31, 2013, life insurance assets associated with these agreements of $10.1 million and $10.2 million, respectively, are included within other long-term assets in the condensed unaudited consolidated balance sheets. For additional information regarding the foregoing agreements with Jorge Mas and Jose Mas, see Note 17 - Related Party Transactions in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Note 18 – Supplemental Guarantor Condensed Unaudited Consolidating Financial Information

The 2011 Convertible Notes, 2009 Convertible Notes and 4.875% Senior Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are each guarantors of the Company's 2013 Credit Facility or other outstanding indebtedness (the “Guarantor Subsidiaries”).  Certain subsidiaries included in the Company's Guarantor Subsidiaries, which are minor individually and in the aggregate, do not guarantee the 4.875% Senior Notes. The Company's subsidiaries organized outside of the United States and certain domestic subsidiaries (collectively, the “Non-Guarantor Subsidiaries”) do not guarantee any of these notes. A Guarantor Subsidiary's guaranty is subject to release in certain customary circumstances, including upon the sale of a majority of the capital stock or substantially all of the assets of such Subsidiary Guarantor, if such Subsidiary Guarantor's guarantee under our 2013 Credit Facility and other indebtedness is released or discharged (other than due to payment under such guarantee), or when the requirements for legal defeasance are satisfied or the obligations are discharged in accordance with the related indentures.

The following supplemental financial information sets forth the condensed unaudited consolidating balance sheets and the condensed unaudited consolidating statements of operations and comprehensive income and cash flows for the parent company (MasTec, Inc.), the Guarantor Subsidiaries on a combined basis, the Non-Guarantor Subsidiaries on a combined basis and the eliminations necessary to arrive at the information for the Company as reported on a consolidated basis. Eliminations represent adjustments to eliminate investments in subsidiaries and intercompany balances and transactions between or among MasTec, Inc., the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries.  Investments in subsidiaries are accounted for using the equity method for this presentation.

22

.

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	793.1		$	170.9		$	—		$	964.0
Costs of revenue, excluding depreciation and amortization	—			689.8			151.3			—			841.1
Depreciation and amortization	—			27.4			6.1			—			33.5
General and administrative expenses	0.6			47.3			5.4			—			53.3
Interest expense, net	—			11.7			0.3			—			12.0
Other (income) expense, net	—			(2.1		)	0.1			—			(2.0		)
(Loss) income from continuing operations before income taxes	$	(0.6	)	$	19.0		$	7.7		$	—		$	26.1
Benefit from (provision for) income taxes	0.2			(9.4		)	(0.7		)	—			(9.9		)
Net (loss) income from continuing operations	$	(0.4	)	$	9.6		$	7.0		$	—		$	16.2
Net loss from discontinued operations	—			—			(0.1		)	—			(0.1		)
Equity in income from subsidiaries, net of tax	16.4			—			—			(16.4		)	—
Net income (loss)	$	16.0		$	9.6		$	6.9		$	(16.4	)	$	16.1
Net income attributable to non-controlling interests	—			—			0.1			—			0.1
Net income (loss) attributable to MasTec, Inc.	$	16.0		$	9.6		$	6.8		$	(16.4	)	$	16.0
Comprehensive income (loss)	$	10.6		$	9.5		$	1.6		$	(11.0	)	$	10.7

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	843.1		$	77.2		$	(1.7	)	$	918.6
Costs of revenue, excluding depreciation and amortization	—			721.2			72.0			(1.7		)	791.5
Depreciation and amortization	—			28.9			2.9			—			31.8
General and administrative expenses	0.3			45.1			3.5			—			48.9
Interest expense, net	—			10.0			—			—			10.0
Loss on extinguishment of debt	—			5.6			—			—			5.6
Other income, net	—			(0.9		)	—			—			(0.9		)
(Loss) income from continuing operations before income taxes	$	(0.3	)	$	33.2		$	(1.2	)	$	—		$	31.7
Benefit from (provision for) income taxes	0.1			(13.0		)	0.5			—			(12.4		)
Net (loss) income from continuing operations	$	(0.2	)	$	20.2		$	(0.7	)	$	—		$	19.3
Net loss from discontinued operations	—			—			(0.9		)	—			(0.9		)
Equity in income from subsidiaries, net of tax	18.8			—			—			(18.8		)	—
Net income (loss)	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Net income attributable to non-controlling interests	—			—			0.0			—			0.0
Net income (loss) attributable to MasTec, Inc.	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Comprehensive income (loss)	$	17.8		$	20.5		$	(2.5	)	$	(18.0	)	$	17.8

23

CONDENSED UNAUDITED CONSOLIDATING BALANCE SHEETS (in millions)

As of March 31, 2014	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,165.3	$	192.6		$	—		$	1,357.9
Property and equipment, net	—		435.9		73.7			—			509.6
Goodwill and other intangible assets, net	—		931.8		152.7			—			1,084.5
Net investments in and advances to (from) consolidated affiliates	1,022.5		173.9		(25.0		)	(1,171.4		)	—
Other long-term assets, including discontinued operations	9.3		36.9		15.2			—			61.4
Total assets	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4
Liabilities and Equity
Total current liabilities	$	—	$	735.7	$	84.7		$	—		$	820.4
Long-term debt	—		833.3		8.0			—			841.3
Other liabilities	—		236.7		78.2			—			314.9
Total liabilities	$	—	$	1,805.7	$	170.9		$	—		$	1,976.6
Total equity	$	1,031.8	$	938.1	$	238.3		$	(1,171.4	)	$	1,036.8
Total liabilities and equity	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4

As of December 31, 2013	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,155.9	$	150.3		$	—		$	1,306.2
Property and equipment, net	—		420.2		67.9			—			488.1
Goodwill and other intangible assets, net	—		933.9		132.2			—			1,066.1
Net investments in and advances to (from) consolidated affiliates	1,006.8		172.4		(24.1		)	(1,155.1		)	—
Other long-term assets, including discontinued operations	9.3		36.2		15.1			—			60.6
Total assets	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0
Liabilities and Equity
Total current liabilities	$	—	$	773.3	$	53.4		$	—		$	826.7
Long-term debt	—		760.9		4.5			—			765.4
Other liabilities	—		236.7		71.1			—			307.8
Total liabilities	$	—	$	1,770.9	$	129.0		$	—		$	1,899.9
Total equity	$	1,016.1	$	947.7	$	212.4		$	(1,155.1	)	$	1,021.1
Total liabilities and equity	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0

24

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF CASH FLOWS (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.3	)	$	15.2		$	(35.3	)	$	—	$	(20.4	)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(23.8		)	—			—		(23.8		)
Capital expenditures	—			(32.6		)	(3.0		)	—		(35.6		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Payments for other investments	—			(1.1		)	—			—		(1.1		)
Net cash used in investing activities	$	—		$	(54.1	)	$	(3.0	)	$	—	$	(57.1	)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	—			76.5			—			—		76.5
Repayments of other borrowings and capital lease obligations	—			(12.9		)	(0.9		)	—		(13.8		)
Excess tax benefits and net proceeds from stock-based awards	1.1			0.7			—			—		1.8
Payments of financing costs	—			(0.2		)	—			—		(0.2		)
Net financing activities and advances (to) from consolidated affiliates	(0.8		)	(24.7		)	25.5			—		—
Net cash provided by financing activities	$	0.3		$	39.4		$	24.6		$	—	$	64.3
Net increase (decrease) in cash and cash equivalents	—			0.5			(13.7		)	—		(13.2		)
Net effect of currency translation on cash	—			—			(0.5		)	—		(0.5		)
Cash and cash equivalents - beginning of period	—			5.3			17.7			—		23.0
Cash and cash equivalents - end of period	$	—		$	5.8		$	3.5		$	—	$	9.3
Cash and cash equivalents of discontinued operations	$	—		$	—		$	—		$	—	$	—
Cash and cash equivalents of continuing operations	$	—		$	5.8		$	3.5		$	—	$	9.3

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.6	)	$	50.3		$	(23.6	)	$	—	$	26.1
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(4.7		)	—			—		(4.7		)
Capital expenditures	—			(25.4		)	(0.4		)	—		(25.8		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Net cash used in investing activities	$	—		$	(26.7	)	$	(0.4	)	$	—	$	(27.1	)
Cash flows provided by (used in) financing activities:
(Repayments of) proceeds from credit facility	$	—		$	(134.0	)	$	—		$	—	$	(134.0	)
Proceeds from senior notes, net	—			250.0			—			—		250.0
Repayments of other borrowings and capital lease obligations	—			(19.1		)	—			—		(19.1		)
Excess tax benefits and net proceeds from stock-based awards	2.8			0.7			—			—		3.5
Payments of acquisition-related contingent consideration	—			(5.0		)	—			—		(5.0		)
Payments of financing costs, including call premiums on extinguishment of debt	—			(11.0		)	—			—		(11.0		)
Net financing activities and advances (to) from consolidated affiliates	(2.2		)	(12.9		)	15.1			—		—
Net cash provided by financing activities	$	0.6		$	68.7		$	15.1		$	—	$	84.4
Net increase (decrease) in cash and cash equivalents	—			92.3			(8.9		)	—		83.4
Net effect of currency translation on cash	—			(0.1		)	—			—		(0.1		)
Cash and cash equivalents - beginning of period	—			12.7			14.1			—		26.8
Cash and cash equivalents - end of period	$	—		$	104.9		$	5.2		$	—	$	110.1
Cash and cash equivalents of discontinued operations	$	—		$	—		$	0.9		$	—	$	0.9
Cash and cash equivalents of continuing operations	$	—		$	104.9		$	4.3		$	—	$	109.2

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are not historical facts but are the intent, belief, or current expectations of our business and industry and the assumptions upon which these statements are based. While management believes that these forward-looking statements are reasonable as and when made, there can be no assurance that future developments affecting us will be those that we anticipate. All comments concerning our expectations for future revenues and operating results are based on our forecasts for our existing operations and do not include the potential impact of any future acquisitions or dispositions. Words such as “anticipates,” “expects,” “intends,” “will,” “could,” “would,” “should,” “may,” “plans,” “believes,” “seeks,” “estimates” and variations of these words and negatives thereof and similar expressions are intended to identify forward-looking statements. These statements are not guarantees of future performance and are subject to risks, uncertainties, and other factors, some of which are beyond our control, are difficult to predict, and could cause actual results to differ materially from those expressed or forecasted in the forward-looking statements.

These risks and uncertainties include those described in “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and elsewhere in this report and in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013, including those described under “Risk Factors” in the Form 10-K, as updated by Item 1A, “Risk Factors” in this report and other filings we make with the Securities and Exchange Commission (“SEC”). Forward-looking statements that were true at the time made may ultimately prove to be incorrect or false. Readers are cautioned to not place undue reliance on forward-looking statements, which reflect management’s view only as of the date of this report. We undertake no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes to future operating results.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following is a discussion of our business, financial position and results of operations as of and for the three month periods ended March 31, 2014 and 2013. This discussion and analysis should be read in conjunction with the audited consolidated financial statements, accompanying notes and Management's Discussion and Analysis of Financial Condition and Results of Operations contained in our Form 10-K for the year ended December 31, 2013.    

Business Overview

We are a leading infrastructure construction company operating mainly throughout North America across a range of industries. Our primary activities include the engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure, such as: petroleum and natural gas pipeline infrastructure; wireless, wireline and satellite communications; electrical utility transmission and distribution; power generation; and industrial infrastructure. Our customers are in these industries. Including our predecessor companies, we have been in business for more than 80 years. We offer our services primarily under the MasTec service mark and, as of March 31, 2014, we had approximately 14,935 employees and 375 locations. We have been consistently ranked among the top specialty contractors by Engineering News-Record for the past five years.

We provide our services to a diversified base of customers. We often provide services under master service and other service agreements, which are generally multi-year agreements. The remainder of our work is generated pursuant to contracts for specific projects or jobs that require the construction or installation of an entire infrastructure system or specified units within an infrastructure system. Revenues from non-recurring, project specific work may experience greater variability than master service agreement work due to the need to replace the revenue as projects are completed. If we are not able to replace work from completed projects with new project work, we may not be able to maintain our current revenue levels or our current level of capacity and resource utilization. We actively review our backlog of project work and take appropriate action to minimize such exposure.

We present our continuing operations in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. This structure is generally focused on broad end-user markets for our labor-based construction services. The Communications segment performs engineering, construction and maintenance of communications infrastructure primarily related to wireless and wireline communications and install-to-the-home. We perform engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries through the Oil and Gas segment. The Electrical Transmission segment primarily serves the energy and utility industries through the engineering, construction and maintenance of electrical transmission lines and substations. The Power Generation and Industrial segment primarily serves the energy and utility end-markets and other end-markets through the installation and construction of renewable power facilities, related electrical transmission infrastructure, ethanol facilities and various types of industrial infrastructure. The Other category primarily includes small business units that perform construction services for a variety of end markets in Mexico and elsewhere internationally.

See Note 15 - Segments and Related Information and Note 16 - Commitments and Contingencies in the notes to the condensed unaudited consolidated financial statements for operating results by segment and for significant customer concentrations.

Backlog

Estimated backlog represents the amount of revenue we expect to realize over the next 18 months from future work on uncompleted contracts, including new contractual agreements on which work has not begun. Our backlog estimates include amounts under master service and other service agreements in addition to construction projects. We determine the amount of backlog for work under master service and other service agreements based on historical trends, anticipated seasonal impacts and estimates of customer demand based on communications with our customers. The following

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presents 18-month backlog for our continuing operations by reportable segment as of the periods indicated (in millions):

Reportable Segment:	March 31, 2014		December 31, 2013		March 31, 2013
Communications	$	3,000	$	2,848	$	2,587
Oil and Gas	605		642		387
Electrical Transmission	394		418		397
Power Generation and Industrial	202		205		69
Other	17		14		15
Estimated 18-month backlog	$	4,218	$	4,127	$	3,455

While our backlog estimates include amounts under master service and other service agreements, our customers are not contractually committed to purchase a minimum amount of services under these agreements, most of which can be canceled on short or no advance notice. For the three month period ended March 31, 2014, 53% of our revenue was derived from projects performed under master service and other service agreements. There can be no assurance as to our customers’ requirements or that our estimates are accurate. In addition, timing of revenues for construction and installation projects included in our backlog can be subject to change as a result of customer delays, regulatory requirements and other project related factors. These changes could cause estimated revenues to be realized in periods later than originally expected, or not at all. As a result, our backlog as of any particular date is an uncertain indicator of future revenues and earnings.

Economic, Industry and Market Factors

While overall economic and market conditions have improved over the past year, we closely monitor the effects that changes in these conditions may have on our customers. General economic conditions can negatively affect demand for our customers' products and services, which can lead to rationalization of our customers' capital and maintenance budgets in certain end markets. This influence, as well as the highly competitive nature of our industry, particularly when work is deferred, can, and in recent years, has, resulted in lower bids and lower profit on the services we provide. In the face of increased pricing pressure, we strive to maintain our profit margins through productivity improvements and cost reduction programs. Other market and industry factors, such as access to capital for customers in the industries we serve, changes to our customers' capital spending plans, changes in technology, tax and other incentives, renewable energy portfolio standards and new or changing regulatory requirements affecting the industries we serve, can affect demand for our services. Fluctuations in market prices for, or availability of, oil, gas and other fuel sources can also affect demand for our pipeline and renewable energy construction services. While we actively monitor economic, industry and market factors affecting our business, we cannot predict the impact such factors may have on our future results of operations, liquidity and cash flows.

Impact of Seasonality and Cyclical Nature of Business

Our revenues and results of operations can be subject to seasonal and other variations. These variations are influenced by weather, customer spending patterns, bidding seasons, project schedules and timing, particularly for large non-recurring projects and holidays. Typically, our revenues are lowest in the first quarter of the year because cold, snowy or wet conditions cause delays. Revenues in the second quarter are typically higher than in the first quarter, as some projects begin, but continued cold and wet weather can often impact second quarter productivity. The third and fourth quarters are typically the most productive quarters of the year, as a greater number of projects are underway and weather is normally more accommodating to construction projects. In the fourth quarter, many projects tend to be completed by customers seeking to spend their capital budget before the end of the year, which generally has a positive impact on our revenues. However, the holiday season and inclement weather can cause delays, which can reduce revenues and increase costs on affected projects. Any quarter may be positively or negatively affected by out of the ordinary weather patterns, such as excessive rainfall or warm winter weather, making it difficult to predict quarterly revenue and margin variations.

Additionally, our industry can be highly cyclical. Fluctuations in end-user demand within the industries we serve, or in the supply of services within those industries, can impact demand for our services. As a result, our business may be adversely affected by industry declines or by delays in new projects. Variations in project schedules or unanticipated changes in project schedules, in particular in connection with large construction and installation projects, can create fluctuations in revenues, which may adversely affect us in a given period, even if not in total. The financial condition of our customers and their access to capital; variations in project margins; regional, national and global economic and market conditions; regulatory or environmental influences; and acquisitions, dispositions or strategic investments can also materially affect quarterly results. Accordingly, our operating results in any particular period may not be indicative of the results that can be expected for any other period.

Critical Accounting Policies and Estimates

This discussion and analysis of our financial condition and results of operations is based upon our condensed unaudited consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these condensed unaudited consolidated financial statements requires us to make estimates and judgments that affect the amounts reported in our condensed unaudited consolidated financial statements and the accompanying notes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis of making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. As management estimates, by their nature, involve judgment regarding future uncertainties, actual results may differ from these estimates if conditions change or if certain key assumptions used in making these estimates ultimately prove to be materially incorrect. Refer to Note 1 – Business, Basis of Presentation and Significant Accounting Policies in the notes to our condensed unaudited consolidated financial statements of this Quarterly Report on Form 10-Q and to our most recent Annual Report on Form 10-K for detailed discussions of our significant accounting policies.

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We believe that our accounting estimates pertaining to: revenues and costs derived from fixed price contracts under the percentage-of-completion method; allowances for doubtful accounts; fair value estimates in connection with business acquisitions, in particular, estimated values of net assets acquired and estimated liabilities for future earn-out obligations; valuation of goodwill and indefinite-lived intangible assets; income taxes; legal contingencies; and self-insurance contingencies are the most critical in the preparation of our consolidated financial statements as they are important to the portrayal of our financial condition and as they require significant or complex judgment and estimates on the part of management. We frequently review our accounting policies and critical accounting measurements with the Audit Committee of the Board of Directors.

Results of Operations

Comparison of Quarterly Results

The following table reflects our consolidated results of operations in dollar and percentage of revenue terms for the periods indicated (dollar amounts in millions). Our consolidated results of operations are not necessarily comparable from period to period due to the impact of recent acquisitions. See Note 3 - Acquisitions in the notes to the condensed unaudited consolidated financial statements.

	Three Months Ended March 31,
	2014					2013
Revenue	$	964.0		100.0	%	$	918.6		100.0	%
Costs of revenue, excluding depreciation and amortization	841.1			87.2	%	791.5			86.2	%
Depreciation and amortization	33.5			3.5	%	31.8			3.5	%
General and administrative expenses	53.3			5.5	%	48.9			5.3	%
Interest expense, net	12.0			1.2	%	10.0			1.1	%
Loss on extinguishment of debt	—			—		5.6			0.6	%
Other income, net	(2.0		)	(0.1	)%	(0.9		)	(0.1	)%
Income from continuing operations before income taxes	$	26.1		2.7	%	$	31.7		3.4	%
Provision for income taxes	(9.9		)	(1.0	)%	(12.4		)	(1.3	)%
Net income from continuing operations	$	16.2		1.7	%	$	19.3		2.1	%
Net loss from discontinued operations	(0.1		)	0.0	%	(0.9		)	(0.1	)%
Net income	$	16.1		1.7	%	$	18.4		2.0	%
Net income attributable to non-controlling interests	0.1			0.0	%	0.0			0.0	%
Net income attributable to MasTec, Inc.	$	16.0		1.7	%	$	18.4		2.0	%

Management reviews our operating results by reportable segment. See Note 15 - Segments and Related Information in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference. Our reportable segments are: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. Management's review of reportable segment results includes analyses of trends in revenue, EBITDA and EBITDA margin. We calculate EBITDA for segment reporting purposes consistently with our consolidated EBITDA calculation. See the discussion of non-U.S. GAAP financial measures following the Comparison of Quarterly Results discussion below. The following table presents revenue and EBITDA by reportable segment for our continuing operations for the periods indicated (dollar amounts in millions):

	For the Three Months Ended March 31,
	Revenue					EBITDA and EBITDA Margin
Reportable Segment:	2014		2013			2014					2013
Communications	$	447.1	$	424.9		$	43.4		9.7	%	$	46.4		10.9	%
Oil and Gas	379.8		318.8			34.9			9.2	%	42.4			13.3	%
Electrical Transmission	80.1		84.6			3.5			4.4	%	3.4			4.0	%
Power Generation and Industrial	54.2		88.9			0.5			0.9	%	(0.2		)	(0.3	)%
Other	2.8		2.3			0.2			5.8	%	0.1			3.8	%
Eliminations	0.0		(0.9		)	—			—		—			—
Corporate	—		—			(10.9		)	NA		(18.6		)	NA
Consolidated Results	$	964.0	$	918.6		$	71.6		7.4	%	$	73.5		8.0	%

The following discussion and analysis of our results of operations should be read in conjunction with our condensed unaudited consolidated financial statements and notes thereto in Item 1 of this Form 10-Q.

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Three Months Ended March 31, 2014 Compared to Three Months Ended March 31, 2013

Revenue. Our revenue was $964 million for the three month period ended March 31, 2014 as compared with $919 million for the same period in 2013, an increase of approximately $45 million, or 5%. Oil and Gas revenue increased by $61 million, or 19%, and Communications revenue increased by approximately $22 million, or 5%. Electrical Transmission revenue decreased by approximately $4 million, or 5%, and Power Generation and Industrial revenue decreased by $35 million, or 39%. Acquisitions contributed $120 million of the year over year increase in revenue, whereas organic revenue declined by $74 million, primarily as a result of winter weather disruptions affecting both existing projects and new project startups. A discussion of revenue by segment follows below.

Communications Segment. Communications revenue was $447 million for the three month period ended March 31, 2014, as compared with $425 million for the same period in 2013, an increase of approximately $22 million, or 5%. Communications revenue was favorably affected by wireless services, which increased by $47 million, or 27%, offset in part by decreases in other Communications segment services such as install-to-the-home, utility services and wireline, which declined by $24 million, primarily as a result of winter weather disruptions. Acquisitions contributed approximately $19 million of the year over year increase in revenue, while organic revenue growth totaled approximately $4 million.

Oil and Gas Segment. Oil and Gas revenue was $380 million for three month period ended March 31, 2014, as compared with $319 million for the same period in 2013, an increase of approximately $61 million, or 19%, driven primarily by increases in midstream pipeline activities as well as pipeline facility and other project work, including pipeline integrity work. Acquisitions contributed $97 million of the year over year increase in revenue, whereas organic revenue declined by $36 million, primarily as a result of winter weather disruptions and timing of project startups.

Electrical Transmission Segment. Electrical Transmission revenue was $80 million for the three month period ended March 31, 2014, as compared with $85 million for the same period in 2013, a decrease of approximately $4 million, or 5%. Acquisitions contributed $5 million of revenue, whereas organic revenue declined by $9 million, primarily as a result of winter weather disruptions and timing of project startups.

Power Generation and Industrial Segment. Power Generation and Industrial revenue was $54 million for the three month period ended March 31, 2014, as compared with $89 million for the same period in 2013, a decrease of $35 million, or 39%. This decrease was primarily caused by lower levels of commercial and industrial project work, resulting from the timing of renewable power projects, which are expected to comprise the majority of this segment's revenue in 2014 and generally do not begin until the spring or summer months.

Other Segment. Other segment revenue totaled $3 million for the three month period ended March 31, 2014, as compared with $2 million for the same period in 2013, an increase of $1 million, or 23%.

Costs of revenue, excluding depreciation and amortization. Costs of revenue, excluding depreciation and amortization, totaled $841 million, or 87.2% of revenue for the three month period ended March 31, 2014, as compared with $791 million, or 86.2% of revenue for the same period in 2013, a $50 million, or 6.3%increase, of which approximately $40 million was driven by higher revenue and approximately $9 million of which was driven by decreased productivity. Costs of revenue, excluding depreciation and amortization, as a percentage of revenue increased by 100 basis points, primarily due to weather-related project inefficiencies.

Depreciation and amortization. Depreciation and amortization was $33 million for the three month period ended March 31, 2014 as compared with $32 million in 2013, or 3.5% of revenue in both periods, an increase of approximately $2 million, or 5.5%. Acquisitions contributed $4 million of the year over year increase in depreciation and amortization expense. See Note 15 - Segments and Related Information in the notes to the condensed unaudited consolidated financial statements for depreciation and amortization expense by reportable segment, which is incorporated herein by reference.

General and administrative expenses. General and administrative expenses were $53 million, or 5.5% of revenue for the three month period ended March 31, 2014, as compared with $49 million, or 5.3% of revenue for the same period in 2013, an increase of approximately $4 million, or 9.1%. Acquisitions contributed approximately $4 million of incremental general and administrative costs. General and administrative expenses for the three month period ended March 31, 2014 included $1 million of higher non-cash stock-based compensation expense as compared with the same period in the prior year. Non-cash stock-based compensation expense increased primarily as a result of the issuance of restricted share awards under a new equity incentive program for certain employees of the EC Source business. As a percentage of revenue, general and administrative costs increased by approximately 20 basis points.

Interest expense, net. Interest expense, net of interest income, was $12 million, or 1.2% of revenue for the three month period ended March 31, 2014, as compared with $10 million, or 1.1% of revenue for the same period in 2013, an increase of $2 million. The increase was largely attributable to incremental interest expense on our outstanding senior notes. In March 2013, we issued $400 million aggregate principal amount of 4.875% senior notes and repurchased and redeemed $150 million aggregate principal amount of 7.625% senior notes.

Loss on extinguishment of debt.We incurred $5.6 million of debt extinguishment costs in 2013 in connection with the repurchase and redemption of $150 million aggregate principal amount of our 7.625% senior notes. This amount comprised $4.1 million of early payment premiums and $1.5 million of unamortized deferred financing costs.

Other income, net. Other income, net, was $2 million for the three month period ended March 31, 2014, as compared with other income, net, of $1 million for the same period in 2013. The increase was driven primarily by gains on sales of equipment.

Provision for income taxes. Income tax expense was $10 million for the three month period ended March 31, 2014, as compared with $12 million for the same period in 2013, representing a decrease of $2 million. The decrease was attributable to lower income and a lower effective tax rate, which decreased from 39.0% in 2013 to 38.0% in 2014.

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Loss from discontinued operations. Loss from discontinued operations, net of tax, was $1 million for the three month period ended March 31, 2013. During the third quarter of 2013, we completed the sale of the Globetec operation.

Analysis of EBITDA by Segment

Communications Segment. EBITDA for our Communications segment was $43 million, or 9.7% of revenue for the three month period ended March 31, 2014, as compared with $46 million, or 10.9% of revenue for the same period in 2013, a $3 million, or 6%decrease. As a percentage of revenue, EBITDA decreased by 120 basis points, or approximately $5 million, primarily as a result of project inefficiencies due to winter weather disruptions and startup costs associated with tower crew training initiatives.

Oil and Gas Segment. EBITDA for our Oil and Gas segment was $35 million for the three month period ended March 31, 2014, or 9.2% of revenue, as compared with $42 million for the same period in 2013, or 13.3% of revenue, a decrease of $7 million, or 18%. As a percentage of revenue, EBITDA decreased by 410 basis points, or approximately $13 million, primarily as a result of project inefficiencies due to weather disruptions and timing of selected project startups, which resulted in decreased levels of overhead cost utilization.

Electrical Transmission Segment. EBITDA for our Electrical Transmission segment was $3 million, or 4.4% of revenue for the three month period ended March 31, 2014, as compared with EBITDA of $3 million, or 4.0% of revenue for the same period in 2013. EBITDA margins increased by 40 basis points, driven primarily by improved project efficiencies, partially offset by project inefficiencies due to weather disruptions.

Power Generation and Industrial Segment. EBITDA for our Power Generation and Industrial segment was $0.5 million, or 1% of revenue for the three month period ended March 31, 2014, as compared with negative EBITDA of $0.2 million for the same period in 2013, an increase of $0.7 million. The increase in EBITDA was driven largely by increased renewable power project work in 2014, which carried higher margins than the commercial and industrial project work that was completed in the first quarter of 2013.

Other Segment. EBITDA from Other businesses was $0.2 million for the three month period ended March 31, 2014, as compared with $0.1 million of EBITDA for the same period in 2013, an increase of $0.1 million. The increase is primarily attributable to higher revenues, as described above.

Corporate. Corporate EBITDA was negative $11 million for the three month period ended March 31, 2014, as compared with negative EBITDA of $19 million for the same period in 2013, an improvement of approximately $8 million. Approximately $6 million of this improvement was driven by debt extinguishment costs recorded in 2013. Corporate EBITDA for the three month period ended March 31, 2014 includes approximately $3 million of non-cash stock based compensation expense, as compared with approximately $2 million in the prior year.

Foreign Operations

We have operations in Canada as well as in parts of Latin America. See Note 15 - Segments and Related Information in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference.

Non-U.S. GAAP Financial Measures

As appropriate, we supplement our reported U.S. GAAP financial information with certain non-U.S. GAAP financial measures, including earnings from continuing operations before interest, income taxes, depreciation and amortization (“EBITDA”). In addition, we have presented “Adjusted EBITDA,” as well as adjusted net income from continuing operations (“Adjusted Net Income From Continuing Operations”) and adjusted diluted earnings per share from continuing operations (“Adjusted Diluted Earnings Per Share From Continuing Operations”). All of these “adjusted” non-U.S GAAP measures exclude non-cash stock-based compensation expense and the loss on debt extinguishment from the repurchase and redemption of our 7.625% senior notes. See Note 11 - Stock-Based Compensation and Other Employee Benefit Plans in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference, and Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013. The definitions of EBITDA and Adjusted EBITDA above are not the same as in our 2013 Credit Facility or in the indentures governing our notes; therefore, EBITDA and Adjusted EBITDA as presented in this discussion should not be used for purposes of determining our compliance with related covenants.

We use EBITDA, Adjusted EBITDA, Adjusted Net Income From Continuing Operations and Adjusted Diluted Earnings Per Share From Continuing Operations to evaluate our performance, both internally and as compared with our peers, because these measures exclude certain items that may not be indicative of our core operating results, as well as items that can vary widely across different industries or among companies within the same industry. Additionally, these measures provide a baseline for analyzing trends in our underlying business. Management also considers EBITDA and Adjusted EBITDA as indicators of our ability to generate cash to service debt, fund capital expenditures and expand our business, but management does not consider the presented non-U.S. GAAP financial measures as measures of our liquidity. While EBITDA and Adjusted EBITDA are measures of our ability to generate cash, these measures exclude the cash impact of changes in our assets and liabilities as well as interest and income taxes. Net cash provided by operating activities in the consolidated statement of cash flows accounts for these changes in our assets and liabilities.

We believe these non-U.S. GAAP financial measures provide meaningful information and help investors understand our financial results and assess our prospects for future performance. Because non-U.S. GAAP financial measures are not standardized, it may not be possible to compare these financial measures with other companies' non-U.S. GAAP financial measures having the same or similar names. These financial measures should not be considered in isolation from, as substitutes for, or alternative measures of, reported net income from continuing operations, diluted earnings per share from continuing operations and net cash provided by operating activities, and should be viewed in conjunction with the most comparable GAAP financial measures and the provided reconciliations thereto. We believe these non-U.S. GAAP financial measures, when viewed with our U.S. GAAP

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results and the provided reconciliations, provide a more complete understanding of our business. We strongly encourage investors to review our consolidated financial statements and publicly filed reports in their entirety and not rely on any single financial measure.

The following table presents a reconciliation of EBITDA and Adjusted EBITDA to net income from continuing operations, in dollar and percentage of revenue terms, for the periods indicated (dollar amounts in millions). The table below may contain slight summation differences due to rounding.

	For the Three Months Ended March 31,
EBITDA Reconciliation - Continuing Operations:	2014				2013
Net income from continuing operations	$	16.2	1.7	%	$	19.3	2.1	%
Interest expense, net	12.0		1.2	%	10.0		1.1	%
Provision for income taxes	9.9		1.0	%	12.3		1.3	%
Depreciation and amortization	33.5		3.5	%	31.8		3.5	%
EBITDA – Continuing Operations	$	71.6	7.4	%	$	73.5	8.0	%
Non-cash stock-based compensation expense	3.3		0.3	%	2.4		0.3	%
Loss on debt extinguishment	—		—		5.6		0.6	%
Adjusted EBITDA – Continuing Operations	$	74.9	7.8	%	$	81.4	8.9	%

The following table presents a reconciliation of EBITDA and Adjusted EBITDA to net cash provided by operating activities for total MasTec (in millions):

	For the Three Months Ended March 31,
	2014			2013
Total EBITDA Reconciliation:
EBITDA, Continuing operations	$	71.6		$	73.5
EBITDA, Discontinued operations	(0.2		)	(1.2		)
EBITDA, Total MasTec	$	71.4		$	72.3
Reconciliation to Adjusted EBITDA and to Net Cash Provided by Operating Activities, Total MasTec:
Non-cash stock-based compensation expense	3.3			2.4
Loss on debt extinguishment	—			5.6
Adjusted EBITDA, Continuing operations	$	74.9		$	81.4
Adjusted EBITDA, Discontinued operations	(0.2		)	(1.2		)
Adjusted EBITDA, Total MasTec	$	74.7		$	80.3
Interest expense	(12.0		)	(10.1		)
Provision for income taxes	(9.8		)	(12.1		)
Payments for call premiums on extinguishment of debt	—			(4.1		)
Adjustments to reconcile net income to net cash provided by operating activities, excluding non-cash EBITDA adjustments (a)	1.5			0.4
Change in assets and liabilities, net of assets acquired and liabilities assumed	(74.8		)	(28.3		)
Net cash (used in) provided by operating activities, Total MasTec	$	(20.4	)	$	26.1

(a) Non-cash EBITDA adjustments include (i) depreciation and amortization expense in both periods; (ii) non-cash stock-based compensation expense in both periods; and (iii) in 2013, a $1.5 million write-off of deferred financing costs on redeemed debt.

Adjusted Income From Continuing Operations and Adjusted Diluted Earnings Per Share From Continuing Operations

The table below reconciles Adjusted Net Income From Continuing Operations and Adjusted Diluted Earnings Per Share From Continuing Operations with reported net income from continuing operations and reported diluted earnings per share from continuing operations, the most directly comparable U.S. GAAP financial measures. Adjustments have been tax effected using the effective tax rate from continuing operations for the respective periods.

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	For the Three Months Ended March 31,
	2014				2013
	Net Income From Continuing Operations (in millions)		Diluted Earnings Per Share, Continuing Operations		Net Income From Continuing Operations (in millions)		Diluted Earnings Per Share, Continuing Operations
Reported U.S GAAP measure	$	16.2	$	0.19	$	19.3	$	0.23
Non-cash stock-based compensation expense (a)	2.0		0.02		1.4		0.02
Loss on debt extinguishment (b)	—		—		3.4		0.04
Adjusted non-U.S. GAAP measure	$	18.2	$	0.21	$	24.2	$	0.29

(a) Represents the after tax expense and corresponding diluted per share impact related to non-cash stock-based compensation expense.

(b) Represents the after tax expense and corresponding diluted per share impact related to loss on debt extinguishment associated with the repurchase and redemption of our 7.625% senior notes.

Financial Condition, Liquidity and Capital Resources

Our primary sources of liquidity are cash flows from continuing operations, availability under our credit facility and our cash balances. Our primary liquidity needs are for working capital, income taxes, capital expenditures, insurance collateral in the form of cash and letters of credit, earn-out obligations and debt service. We also evaluate opportunities for strategic acquisitions and investments from time to time, and we may consider opportunities to repurchase, refinance or retire outstanding debt or repurchase outstanding shares of our common stock in the future, any of which may require use of cash.

Capital Expenditures. We estimate that we will spend between $90 million and $100 million in 2014 on capital expenditures, and we expect to incur approximately $100 million of equipment purchases under capital lease or other financing arrangements. For the three month period ended March 31, 2014, we spent approximately $36 million on capital expenditures, or $32 million net of asset disposals, and incurred approximately $14 million of equipment purchases under capital lease and other financing arrangements. Actual capital expenditures can increase or decrease from estimates depending upon business activity levels. We will continue to evaluate lease versus buy decisions to meet our equipment needs and, based on this evaluation, our capital expenditures may increase or decrease in the future.

Acquisition-Related Contingent Consideration. In most of our recent acquisitions, we have agreed to make future earn-out payments to the sellers, which are contingent upon the future earnings performance of the acquired businesses. Certain earn-out payments may be paid in either cash or, under specific circumstances, MasTec common stock, or a combination thereof, at our option. The estimated total value of earn-out obligations recorded as liabilities as of March 31, 2014 is approximately $184 million. Of this amount, $73 million represents the liability for earn-out obligations that have already been earned. The remainder, $111 million, is management's estimate of potential future earn-out obligations that are contingent upon future performance. Potential future earn-out obligations for acquisitions after January 1, 2009 are measured at their estimated fair value as of the date of acquisition, with subsequent changes in fair value recorded in earnings as a component of other income or expense, in accordance with U.S. GAAP. Earn-outs for acquisitions completed prior to January 1, 2009 are recorded as additional goodwill as earned. During the three month period ended March 31, 2014, we made no cash payments related to earn-out obligations. During the three month period ended March 31, 2013, we made cash payments of $5 million related to earn-out obligations.

Income Taxes. Cash tax payments, net of tax refunds, were $12 million and $8 million for the three month periods ended March 31, 2014 and 2013, respectively. Quarterly tax payments are based on estimates of full year taxable income activity and estimated tax rates. Our cash tax payments increased for the three month period ended March 31, 2014 as compared with the same period in the prior year primarily as a result of higher expected taxable income and earnings.

Working Capital. We need working capital to support seasonal variations in our business, primarily due to the impact of weather conditions on external construction and maintenance work and the spending patterns of our customers, both of which influence the timing of associated spending to support related customer demand. Our business is typically slower in the first quarter of each calendar year. Working capital needs tend to increase when we commence large amounts of work due to the fact that payroll and certain other costs, including inventory, are required to be paid before the receivables resulting from work performed are billed and collected. Timing of project close-outs can contribute to changes in unbilled revenue. Accounts receivable balances increased to $1.2 billion as of March 31, 2014 from $1.1 billion as of December 31, 2013, primarily as a result of an increase in days sales outstanding, as discussed within the Summary of Financial Condition, Liquidity and Capital Resources below. Inventory balances have increased from $70 million as of December 31, 2013 to $89 million as of March 31, 2014, primarily due to increases in wireless project inventories resulting from project delays due to winter weather disruptions.

Our billing terms are generally net 30 days, and some of our contracts allow our customers to retain a portion of the contract (from 2% to 15%) amount until the job is completed. For certain customers, we maintain inventory to meet the material requirements of the contracts. Occasionally, certain of our customers pay us in advance for a portion of the materials we purchase for their projects, or allow us to pre-bill them for materials purchases up to specified amounts. Vendor terms are generally 30 days. Our agreements with subcontractors often contain a “pay-if-paid” provision, whereby our payments to subcontractors are made only after we are paid by our customers.

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Convertible Notes - Settlement. Our senior convertible notes, which had an outstanding principal amount of $215 million as of March 31, 2014, mature in 2014. We expect to refinance the entire principal amount of these notes on a long-term basis, either from borrowings under our 2013 Credit Facility or through other sources of available funding. As a result, their carrying values as of March 31, 2014 have been presented within long-term debt in the condensed unaudited consolidated financial statements. As of March 31, 2014, our common stock trading price was higher than the conversion prices of our 2011 Convertible Notes, of which $202.3 million aggregate principal amount was outstanding. Currently, we intend to settle the principal amounts of our 2011 Convertible Notes upon any conversion thereof in cash, and we intend to settle any premium value, which is the value of any excess of the actual share price over the conversion prices of the 2011 Convertible Notes, in shares of our common stock. Notwithstanding our present intention to settle conversions of our 2011 Convertible Notes in cash, we cannot assure you that we will be able to do so due to restrictions under our 2013 Credit Facility; however, as of March 31, 2014, these restrictions would not have limited our ability to settle the 2011 Convertible Notes in cash. See the discussion in Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Summary of Financial Condition, Liquidity and Capital Resources

There were no changes in general U.S. and global economic conditions since December 31, 2013 that have had a significant impact on our overall financial position, results of operations or cash flows for the three month period ended March 31, 2014. As a result of our current capital structure, including our 2013 Credit Facility, we do not anticipate that current overall capital market conditions will materially impact our liquidity. We anticipate that funds generated from operations, borrowings under our 2013 Credit Facility and our cash balances will be sufficient to meet our working capital requirements, required income tax payments, debt service obligations, anticipated capital expenditures, insurance collateral requirements, earn-out obligations and letters of credit for at least the next twelve months.

Sources and Uses of Cash

As of March 31, 2014, we had $538 million in working capital, defined as current assets less current liabilities, as compared with $479 million as of December 31, 2013, an increase of approximately $58 million. Our working capital has increased, primarily as a result of higher accounts receivable and inventory balances, as discussed below. Total cash and cash equivalents of $9 million as of March 31, 2014decreased by $14 million from total cash and cash equivalents of $23 million as of December 31, 2013.

Sources and uses of cash are summarized below (in millions):

	For the Three Months Ended March 31,
	2014			2013
Net cash (used in) provided by operating activities	$	(20.4	)	$	26.1
Net cash used in investing activities	$	(57.1	)	$	(27.1	)
Net cash provided by financing activities	$	64.3		$	84.4

Operating Activities. Cash flow from operations is primarily influenced by demand for our services, operating margins and the type of services we provide, but can also be influenced by working capital needs such as the timing of billings and collections of receivables and the settlement of payables and other obligations. Cash flow from operations during the three month period ended March 31, 2014 was negatively affected by increased levels of unapproved change orders, the majority of which were resolved in principle subsequent to quarter-end, as well as weather-related disruptions, which caused delays in achieving certain billing milestones. As a result, cash used in operating activities for the three month period ended March 31, 2014 was $20 million, as compared with $26 million of cash provided by operating activities for the same period in 2013. Net changes in assets and liabilities had a negative impact on cash provided by operating activities of $47 million, related largely to the use of cash for working capital, primarily accounts receivable and inventory.

Days sales outstanding, net of billings in excess of costs and earnings for our continuing operations was 101 as of March 31, 2014 as compared with 80 as of December 31, 2013. Days sales outstanding, net of billings in excess of costs and earnings is calculated as: accounts receivable, net, less billings in excess of costs and earnings, divided by average daily revenue for the most recently completed quarter as of the balance sheet date. The increase in days sales outstanding is due to increased levels of unapproved change orders, the majority of which were resolved in principle subsequent to quarter-end, as well as weather disruption-related delays in achieving billing milestones.

Investing Activities. Net cash used in investing activities increased by $30 million to $57 million for the three month period ended March 31, 2014 from $27 million of cash used in investing activities for the three month period ended March 31, 2013. Payments for current year acquisitions were $24 million, a $19 million increase as compared with the prior year period. Additionally, we spent $36 million on capital expenditures for the three month period ended March 31, 2014, or $32 million net of asset disposals, as compared with capital expenditures of $22 million, net of asset disposals, for the same period in the prior year, an increase of $10 million. While cash-based capital expenditures have increased as compared with the prior year period, total capital additions including capital lease and other financing arrangements have decreased, from $63 million for the three month period ended March 31, 2013 to $50 million for the three month period ended March 31, 2014. Capital investments in the first quarter of 2014 were primarily in support of our Oil and Gas segment, which generally requires higher levels of capital investment, as well as our Communications segment.

Financing Activities. Cash provided by financing activities for the three month period ended March 31, 2014 was $64 million, as compared with $84 million for the three month period ended March 31, 2013, a decrease of $20 million. For the three month period ended March 31, 2013, proceeds from the issuance of our $400 million aggregate principal amount of 4.875% senior notes (the “4.875% Senior Notes”) were partially offset by the repurchase and redemption of our $150 million principal amount of 7.625% senior notes (the “7.625% Senior Notes”), as well as net repayments of outstanding balances on our credit facility of $134 million. The net effect of senior note and credit facility-related financing activities for the three

33

month period ended March 31, 2013 was approximately $116 million of cash provided. For the three month period ended March 31, 2014, we borrowed $77 million on our credit facility, net of repayments.

Credit Facility

Our 2013 Credit Facility is a senior secured revolving credit facility that matures on October 29, 2018 and has a maximum available borrowing capacity of $750 million, of which up to $100 million may be borrowed in Canadian dollars, and under which up to $450 million is available for letters of credit and up to $75 million is available for swing line loans. See the discussion in Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013 for terms and conditions associated with our 2013 Credit Facility. Also see Note 9 - Debt in the notes to the condensed unaudited consolidated financial statements in this Quarterly Report on Form 10-Q for current period balances and discussion, which Note is incorporated herein by reference. Based upon current availability under our 2013 Credit Facility, our liquidity and our anticipated cash flow, we believe we will be in compliance with the 2013 Credit Facility’s terms and conditions for the next twelve months. We are dependent upon borrowings and letters of credit under the 2013 Credit Facility to fund our operations. Should we be unable to comply with the terms and conditions of the 2013 Credit Facility, we would be required to obtain modifications to the 2013 Credit Facility or obtain an alternative source of financing to continue to operate, neither of which may be available to us on commercially reasonable terms, or at all.

4.875% Senior Notes

We have $400 million of 4.875% senior notes due March 15, 2023 (the “4.875% Senior Notes”). See Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013 for additional information.

Senior Convertible Notes

We had $202.3 million principal amount of 2011 Convertible Notes as of March 31, 2014. If the average price per share of our common stock the 2011 Convertible Notes exceeds the respective conversion prices of the 2011 Convertible Notes, the resulting amount, in shares, of any premium will be included in our diluted share count (“premium shares”). Our average share price exceeded the conversion prices of the 2011 Convertible Notes for the three month period ended March 31, 2014. See Note 2 – Earnings Per Share in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference. The number of premium shares included in our diluted share count will vary with fluctuations in our share price. Higher actual share prices result in a greater number of premium shares. Because the number of shares required to be included in our diluted share count will vary with changes in our actual share price, we cannot predict the dilutive impact of any such premium shares in future periods. As of March 31, 2014, an aggregate principal amount of $12.6 million of 2009 Convertible Notes was outstanding. See Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Debt Guarantees and Covenants

The 2011 Convertible Notes, 2009 Convertible Notes and the 4.875% Senior Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of our 2013 Credit Facility or other outstanding indebtedness. See Note 18 - Supplemental Guarantor Condensed Unaudited Consolidating Financial Information in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference. We were in compliance with all provisions and covenants pertaining to our outstanding debt instruments as of March 31, 2014.

Off-balance sheet arrangements

As is common in our industry, we have entered into certain off-balance sheet arrangements in the ordinary course of business. Our significant off-balance sheet transactions include liabilities associated with non-cancelable operating leases, letter of credit obligations, surety and performance and payment bonds entered into in the normal course of business, self-insurance liabilities, liabilities associated with multi-employer pension plans and liabilities associated with certain indemnification and guarantee arrangements. We do not have any material off-balance sheet financing arrangements with variable interest entities. Refer to Note 16 - Commitments and Contingencies in the notes to the condensed unaudited consolidated financial statements, which is incorporated herein by reference, for current period details pertaining to our off-balance sheet arrangements.

Impact of Inflation

The primary inflationary factors affecting our operations are labor and fuel costs, and to a lesser extent, material costs. The price of fuel is subject to unexpected fluctuations due to events outside of our control, including geopolitical events and fluctuations in global supply and demand. Significant fuel price increases could adversely impact our operating results in the future. We closely monitor inflationary factors and any impact they may have on our operating results or financial condition.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

Interest on outstanding revolving loans under our 2013 Credit Facility accrues at variable rates based, at our option, on a eurocurrency rate, as defined in the 2013 Credit Facility, plus a margin, or a base rate, as defined in the 2013 Credit Facility, plus a margin. As of March 31, 2014, we had $129 million aggregate principal amount of outstanding revolving loans under our 2013 Credit Facility with a weighted average interest rate of 2.08%. As of March 31, 2014, interest on letters of credit issued under our 2013 Credit Facility accrued at 0.75% per annum for performance standby letters of credit and at 1.50% per annum for financial standby letters of credit. A 100 basis point increase in the interest rate applicable to revolving loans under our 2013 Credit Facility would not have had a material impact on our results of operations for the three month period ended March 31, 2014.

As of March 31, 2014, our fixed interest rate debt primarily included $400 million aggregate principal amount of 4.875% Senior Notes, $115 million aggregate principal amount of 4.0% senior convertible notes, $100 million aggregate principal amount of 4.25% senior convertible notes and $30 million of notes payable for equipment, which had a weighted average interest rate of approximately 3.0%. None of this debt subjects us to interest rate risk, but we may be subject to changes in interest rates if and when we refinance this debt at maturity or otherwise.

Foreign Currency Risk

We have foreign operations in Canada as well as in parts of Latin America. For the three month period ended March 31, 2014, we had foreign currency translation losses of $5 million, relating primarily to our Canadian operations, which were recorded as a component of other comprehensive loss. Our Canadian presence has grown in recent years due to acquisitions. Our exposure to fluctuations in foreign currency exchange rates could increase in the future if we continue to expand our operations outside of the United States.

Item 4. CONTROLS AND PROCEDURES

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (“the Exchange Act”). Based upon that evaluation, we concluded that as of March 31, 2014, our disclosure controls and procedures were effective to ensure that information required to be disclosed in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow for timely decisions regarding required disclosures.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of Exchange Act Rules 13a-15 or 15d-15 that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II.     OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Legacy Litigation

Refer to Note 16 – Commitments and Contingencies in the notes to our condensed unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q, which is incorporated herein by reference in this Item 1, for a discussion of any recent material developments related to our legal proceedings since the filing of our most recent Annual Report on Form 10-K.

ITEM 1A. RISK FACTORS

Except as set forth below, there have been no material changes to any of the risk factors disclosed in our recently filed Annual Report on Form 10-K, as updated by our Quarterly Reports on Form 10-Q.

Risks Related to Our Business

We derive a significant portion of our revenue from a few customers, and the loss of one of these customers or a reduction in their demand for our services could impair our financial performance.

For the three month period ended March 31, 2014, we derived approximately 22%, 14% and 14% of our revenue from AT&T, DIRECTV^® and Enbridge, Inc., respectively. For the three month period ended March 31, 2013, we derived approximately 18%, 16% and 12% of our revenue from AT&T, DIRECTV^® and Enbridge, Inc., respectively. In addition, our ten largest customers accounted for approximately 73% and 69% of our revenue for the three month periods ended March 31, 2014 and 2013, respectively. Because our business is concentrated among relatively few major customers,

35

and certain of our services are provided on a non-recurring, project by project basis, our results of operations, cash flows and liquidity could be negatively affected if these customers reduce the amount of business they provide to us, or if we complete the required work on our projects for these customers and cannot replace them with similar projects. Approximately 47% of our revenue was derived from non-recurring project specific work for the three month period ended March 31, 2014, which may further increase this risk if we are not able to replace completed project work with new work. In addition, many of the contracts with our largest customers may be canceled on short or no advance notice. Any of these factors could negatively impact our results of operations, cash flows and liquidity.

ITEM 2.     UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table provides information about repurchases of our common stock during the quarter ended March 31, 2014:

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares that May Yet be Purchased under the Program
January 1 through January 31	—		$	—	—	$	—
February 1 through February 28	543	(a)	$	36.58	—	$	—
March 1 through March 31	94,177	(a)	$	42.44	—	$	—
Total	94,720				—

(a) Reflects share repurchases associated with certain employee elections under compensation and benefit programs.

ITEM 6.     EXHIBITS

Exhibit No.	Description (1)
10.1	Amended and Restated Employment Agreement by and between MasTec, Inc. and C. Robert Campbell, dated January 23, 2014, filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on January 24, 2014 and incorporated by reference herein.
10.2	Employment Agreement by and between MasTec, Inc. and George Pita, dated January 23, 2014, filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the SEC on January 24, 2014 and incorporated by reference herein.
10.3	Employment Agreement, dated March 31, 2014, between MasTec, Inc. and Alberto de Cardenas, filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.4	First Amendment to the Employment Agreement between MasTec, Inc. and Jose R. Mas, dated March 31, 2014, filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.5	First Amendment to the Employment Agreement between MasTec, Inc. and George Pita, dated March 31, 2014, filed as Exhibit 10.3 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.6	First Amendment to the Employment Agreement between MasTec, Inc. and Robert E. Apple, dated March 31, 2014, filed as Exhibit 10.4 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
12.1*	Computation of Ratio of Earnings to Fixed Charges
31.1*	Certifications required by Section 302(a) of the Sarbanes-Oxley Act of 2002
31.2*	Certifications required by Section 302(a) of the Sarbanes-Oxley Act of 2002
32.1*	Certifications required by Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certifications required by Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase
101.DEF*	XBRL Taxonomy Extension Definition Linkbase
101.LAB*	XBRL Taxonomy Extension Label Linkbase
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase

______________

(1) SEC file number for all Securities Exchange Act reports referenced in the exhibit list is 001 - 08106.

* Filed herewith.

+ Management contract or compensation plan arrangement.

36

37

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		MASTEC, INC.
Date:	May 1, 2014
		/s/  JOSE R. MAS
		Jose R. Mas
		Chief Executive Officer
		(Principal Executive Officer)
		/s/  GEORGE L. PITA
		George L. Pita
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

38

Exhibit Index

Exhibit No.	Description (1)
10.1	Amended and Restated Employment Agreement by and between MasTec, Inc. and C. Robert Campbell, dated January 23, 2014, filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on January 24, 2014 and incorporated by reference herein.
10.2	Employment Agreement by and between MasTec, Inc. and George Pita, dated January 23, 2014, filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the SEC on January 24, 2014 and incorporated by reference herein.
10.3	Employment Agreement, dated March 31, 2014, between MasTec, Inc. and Alberto de Cardenas, filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.4	First Amendment to the Employment Agreement between MasTec, Inc. and Jose R. Mas, dated March 31, 2014, filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.5	First Amendment to the Employment Agreement between MasTec, Inc. and George Pita, dated March 31, 2014, filed as Exhibit 10.3 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
10.6	First Amendment to the Employment Agreement between MasTec, Inc. and Robert E. Apple, dated March 31, 2014, filed as Exhibit 10.4 to our Current Report on Form 8-K filed with the SEC on April 4, 2014 and incorporated by reference herein.
12.1*	Computation of Ratio of Earnings to Fixed Charges
31.1*	Certifications required by Section 302(a) of the Sarbanes-Oxley Act of 2002
31.2*	Certifications required by Section 302(a) of the Sarbanes-Oxley Act of 2002
32.1*	Certifications required by Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certifications required by Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase
101.DEF*	XBRL Taxonomy Extension Definition Linkbase
101.LAB*	XBRL Taxonomy Extension Label Linkbase
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase

______________

(1) SEC file number for all Securities Exchange Act reports referenced in the exhibit list is 001 - 08106.

* Filed herewith.

+ Management contract or compensation plan arrangement.

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EX-12.1

Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(dollar amounts in thousands)

	For the Three Months Ended March 31,
	2014		2013
Earnings:
Income from continuing operations before income taxes	$	26,106	$	31,668
Add: Fixed charges	33,331		26,415
Total earnings	$	59,437	$	58,083
Fixed charges:
Interest expense	$	12,040	$	10,147
Estimate of interest expense within rental expense	21,291		16,268
Total fixed charges	$	33,331	$	26,415
Ratio of earnings to fixed charges	1.8		2.2

EX-31.1

Exhibit 31.1

CERTIFICATIONS REQUIRED BY SECTION 302(A)

OF SARBANES-OXLEY ACT OF 2002

I, Jose R. Mas, certify that:

I have reviewed this quarterly report on Form 10-Q of MasTec, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this quarterly report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2014
		/s/ Jose R. Mas
		Jose R. Mas          Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS REQUIRED BY SECTION 302(A)

OF SARBANES-OXLEY ACT OF 2002

I, George L. Pita, certify that:

I have reviewed this quarterly report on Form 10-Q of MasTec, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this quarterly report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2014
		/s/ George L. Pita
		George L. Pita Chief Financial Officer (Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of MasTec, Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jose R. Mas, Chief Executive Officer of MasTec, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	May 1, 2014
		/s/ Jose R. Mas
		Jose R. Mas Chief Executive Officer (Principal Executive Officer)

The certification set forth above is being furnished as an exhibit solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and is not being filed as part of the Quarterly Report on Form 10-Q for the period ended March 31, 2014, or as a separate disclosure document of the Company or the certifying officers.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of MasTec, Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, George L. Pita, Chief Financial Officer of MasTec, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	May 1, 2014
		/s/ George L. Pita
		George L. Pita Chief Financial Officer (Principal Financial and Accounting Officer)

The certification set forth above is being furnished as an exhibit solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and is not being filed as part of the Quarterly Report on Form 10-Q for the period ended March 31, 2014, or as a separate disclosure document of the Company or the certifying officers.

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Business, Basis of Presentation and Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	5
Revenue Recognition [Line Items]
Unapproved change orders, amount	$ 163	$ 79
Unapproved change orders, description	The Company may incur costs subject to change orders, whether approved or unapproved by the customer, and/or claims related to certain contracts. Management determines the probability that such costs will be recovered based upon evidence such as engineering studies and legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer. The Company treats project costs as a cost of contract performance in the period incurred if it is not probable that the costs will be recovered, or defers costs and/or recognizes revenue up to the amount of the related cost if it is probable that the contract price will be adjusted and can be reliably estimated. As of March 31, 2014 and December 31, 2013, the Company had approximately $163 million and $79 million, respectively, of change orders and/or claims that had been included as contract price adjustments on certain contracts that were in the process of being negotiated in the normal course of business, including arbitration and other proceedings. These contract price adjustments represent management's best estimate of additional contract revenues that have been earned and that management believes are probable of collection. The amounts ultimately realized upon final acceptance by its customers could be higher or lower than such estimated amounts, which are primarily expected to be billed and collected within one year. The $84 million increase in change orders and/or claims since December 31, 2013 is primarily due to a project in our Oil and Gas segment, which amounts have been approved in principle subsequent to March 31, 2014.
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Standards Not Yet Adopted	In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”). ASU 2014-08 changes the requirements for reporting discontinued operations and requires additional disclosures about discontinued operations. Only disposals of components of an entity representing a strategic shift that has, or will have, a major effect on an entity’s operations and financial results should be reported as discontinued operations under ASU 2014-08. Examples include a disposal of a major geographical area, a major line of business, or a major equity method investment. ASU 2014-08 also requires expanded disclosures about discontinued operations and requires disclosures about individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. The Company is currently evaluating the potential impact of this ASU on its condensed unaudited consolidated financial statements.
Recently Adopted Accounting Pronouncements	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force) (“ASU 2013-11”).  ASU 2013-11 provides guidance on the presentation in the financial statements of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, and explains that unrecognized tax benefits should be presented as a reduction to deferred tax assets for net operating loss carryforwards, similar tax losses or tax credit carryforwards. To the extent a net operating loss carryforward, similar tax loss or tax credit carryforward is not available as of the reporting date under the tax law of the applicable jurisdiction, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists as of the reporting date. ASU 2013-11 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Retrospective application is permitted. The Company adopted ASU 2013-11 as of January 1, 2014. The adoption of this ASU did not have a material impact on the condensed unaudited consolidated financial statements.
Unapproved Change Orders [Member]
Revenue Recognition [Line Items]
Unapproved change orders, increase	$ 84
Unapproved Change Orders [Member] | Unbilled Revenue [Member]
Revenue Recognition [Line Items]
Unapproved change orders, period expected to be outstanding	1 year

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Fair Value of Financial Instruments (Schedule Of Fair Values Of Financial Assets and Liabilities Measured On A Non-Recurring Basis) (Details) (Unsecured Debt [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Carrying Amount [Member] | Senior Notes [Member] | 4.875% Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Senior notes	$ 400.0	$ 400.0
Carrying Amount [Member] | Convertible Debt [Member] | 2009 Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Convertible notes	12.6	12.6
Carrying Amount [Member] | Convertible Debt [Member] | 2011 Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Convertible notes	199.7	198.3
Fair Value [Member] | Senior Notes [Member] | 4.875% Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Senior notes	390.5	380.0
Fair Value [Member] | Convertible Debt [Member] | 2009 Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Convertible notes	35.0	26.6
Fair Value [Member] | Convertible Debt [Member] | 2011 Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Convertible notes	$ 563.2	$ 428.3

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Discontinued Operations (Results of Operations from Discontinued Operations) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Discontinued Operations Disclosures [Line Items]
Net loss from discontinued operations	$ (122,000)	$ (947,000)
Globetec [Member]
Discontinued Operations Disclosures [Line Items]
Revenue		6,300,000
Loss from operations, before tax		(1,200,000)
Benefit from income taxes		300,000
Net loss from discontinued operations		$ (900,000)

XML

Stock-Based Compensation and Other Employee Benefit Plans (Summary of Employee Stock Purchase Plan Activity) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Common shares issued	26,968	67,556
Weighted average price per share	$ 9.77
Employee Stock Purchase Plan [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Cash proceeds (in millions)	$ 0.8	$ 0.9
Weighted average price per share	$ 27.81	$ 13.19
Weighted average grant date fair value per share	$ 6.59	$ 5.00

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Accounts Receivable, Net Of Allowance (Schedule Of Accounts Receivable, Net of Allowance) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Contract billings	$ 627,100,000	$ 606,500,000
Retainage	135,600,000	159,300,000
Costs and earnings in excess of billings	448,600,000	384,600,000
Accounts receivable, gross	1,211,300,000	1,150,400,000
Less allowance for doubtful accounts	(15,700,000)	(15,800,000)
Accounts receivable, net	$ 1,195,603,000	$ 1,134,577,000

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Segments and Related Information (Schedule of Segment Reporting Information, by Segment - Revenue) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 964,029	$ 918,648
Operating Segments [Member] | Communications [Member]
Segment Reporting Information [Line Items]
Revenue	447,100	424,900
Operating Segments [Member] | Oil and Gas [Member]
Segment Reporting Information [Line Items]
Revenue	379,800	318,800
Operating Segments [Member] | Electrical Transmission [Member]
Segment Reporting Information [Line Items]
Revenue	80,100	84,600
Operating Segments [Member] | Power Generation and Industrial [Member]
Segment Reporting Information [Line Items]
Revenue	54,200	88,900
Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Revenue	2,800	2,300
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	$ 0	$ (900)

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Discontinued Operations (Narrative) (Details) (Globetec [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		0 Months Ended
	Aug. 31, 2013	Mar. 31, 2014	Mar. 31, 2014 Surety Bond [Member]	Mar. 31, 2014 Surety Bond [Member] Plan [Member]
Discontinued Operations Disclosures [Line Items]
Discontinued operations description		In 2012, the Company's board of directors approved a plan of sale for its Globetec business. Accordingly, Globetec's projects and assets are reflected as assets and liabilities of discontinued operations in the condensed unaudited consolidated balance sheets for all periods presented, and Globetec's results of operations are presented as discontinued operations in the condensed unaudited consolidated statements of operations for all periods presented. Effective August 31, 2013, the Company sold all of its membership interests in Globetec for nominal consideration and retained certain contingent assets and liabilities.
Disposal date		Aug. 31, 2013
Discontinued operation, membership interests remaining	0.00%
Outstanding bonds, amount			$ 15.9
Estimated cost to complete bonded projects				$ 0.5

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Property and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule of Property And Equipment, Net

The following table provides details of property and equipment, net, including property and equipment held under capital leases as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Land	$	4.6		$	4.8
Buildings and leasehold improvements	17.6			18.0
Machinery and equipment	752.2			727.1
Office furniture and equipment	108.0			102.5
Construction in progress	16.9			11.0
Total property and equipment	$	899.3		$	863.4
Less accumulated depreciation and amortization	(389.7		)	(375.3		)
Property and equipment, net	$	509.6		$	488.1

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Segments and Related Information (Schedule of Segment Reporting Information, by Segment - EBITDA) (Details) (Continuing Operations [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
EBITDA	$ 71.6	$ 73.5
Operating Segments [Member] | Communications [Member]
Segment Reporting Information [Line Items]
EBITDA	43.4	46.4
Operating Segments [Member] | Oil and Gas [Member]
Segment Reporting Information [Line Items]
EBITDA	34.9	42.4
Operating Segments [Member] | Electrical Transmission [Member]
Segment Reporting Information [Line Items]
EBITDA	3.5	3.4
Operating Segments [Member] | Power Generation and Industrial [Member]
Segment Reporting Information [Line Items]
EBITDA	0.5	(0.2)
Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
EBITDA	0.2	0.1
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
EBITDA	$ (10.9)	$ (18.6)

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Other Retirement Plans (Schedule of Multi-Employer Plan Contributions) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Multi-Employer Plans [Line Items]
Multi-employer plans, contributions	$ 8.3	$ 9.1
Multi-Employer Plans, Pension [Member]
Multi-Employer Plans [Line Items]
Multi-employer plans, contributions	7.8	8.3
Multi-employer Plans, Postretirement Benefit [Member]
Multi-Employer Plans [Line Items]
Multi-employer plans, contributions	$ 0.5	$ 0.8
Workforce Subject to Collective Bargaining Arrangements [Member] | Minimum [Member]
Multi-Employer Plans [Line Items]
Multi-employer plans, covered employees	1,098	778
Workforce Subject to Collective Bargaining Arrangements [Member] | Maximum [Member]
Multi-Employer Plans [Line Items]
Multi-employer plans, covered employees	1,308	1,149

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information (Condensed Unaudited Consolidating Balance Sheets) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Assets
Current assets, including discontinued operations	$ 1,357,936,000	$ 1,306,223,000
Property and equipment, net	509,585,000	488,132,000
Goodwill and other intangible assets, net	1,084,500,000	1,066,100,000
Net investments in and advances to (from) consolidated affilliates	0	0
Other long-term assets, including disontinued operations	61,439,000	60,552,000
Total assets	3,013,407,000	2,920,967,000
Liabilities and Equity
Total current liabilities	820,389,000	826,746,000
Long-term debt	841,335,000	765,425,000
Other liabilities	314,900,000	307,800,000
Total liabilities	1,976,560,000	1,899,910,000
Total equity	1,036,847,000	1,021,057,000
Total liabilities and equity	3,013,407,000	2,920,967,000
Eliminations [Member]
Assets
Current assets, including discontinued operations	0	0
Property and equipment, net	0	0
Goodwill and other intangible assets, net	0	0
Net investments in and advances to (from) consolidated affilliates	(1,171,400,000)	(1,155,100,000)
Other long-term assets, including disontinued operations	0	0
Total assets	(1,171,400,000)	(1,155,100,000)
Liabilities and Equity
Total current liabilities	0	0
Long-term debt	0	0
Other liabilities	0	0
Total liabilities	0	0
Total equity	(1,171,400,000)	(1,155,100,000)
Total liabilities and equity	(1,171,400,000)	(1,155,100,000)
MasTec, Inc. [Member]
Assets
Current assets, including discontinued operations	0	0
Property and equipment, net	0	0
Goodwill and other intangible assets, net	0	0
Net investments in and advances to (from) consolidated affilliates	1,022,500,000	1,006,800,000
Other long-term assets, including disontinued operations	9,300,000	9,300,000
Total assets	1,031,800,000	1,016,100,000
Liabilities and Equity
Total current liabilities	0	0
Long-term debt	0	0
Other liabilities	0	0
Total liabilities	0	0
Total equity	1,031,800,000	1,016,100,000
Total liabilities and equity	1,031,800,000	1,016,100,000
Guarantor Subsidiaries [Member]
Assets
Current assets, including discontinued operations	1,165,300,000	1,155,900,000
Property and equipment, net	435,900,000	420,200,000
Goodwill and other intangible assets, net	931,800,000	933,900,000
Net investments in and advances to (from) consolidated affilliates	173,900,000	172,400,000
Other long-term assets, including disontinued operations	36,900,000	36,200,000
Total assets	2,743,800,000	2,718,600,000
Liabilities and Equity
Total current liabilities	735,700,000	773,300,000
Long-term debt	833,300,000	760,900,000
Other liabilities	236,700,000	236,700,000
Total liabilities	1,805,700,000	1,770,900,000
Total equity	938,100,000	947,700,000
Total liabilities and equity	2,743,800,000	2,718,600,000
Non-Guarantor Subsidiaries [Member]
Assets
Current assets, including discontinued operations	192,600,000	150,300,000
Property and equipment, net	73,700,000	67,900,000
Goodwill and other intangible assets, net	152,700,000	132,200,000
Net investments in and advances to (from) consolidated affilliates	(25,000,000)	(24,100,000)
Other long-term assets, including disontinued operations	15,200,000	15,100,000
Total assets	409,200,000	341,400,000
Liabilities and Equity
Total current liabilities	84,700,000	53,400,000
Long-term debt	8,000,000	4,500,000
Other liabilities	78,200,000	71,100,000
Total liabilities	170,900,000	129,000,000
Total equity	238,300,000	212,400,000
Total liabilities and equity	$ 409,200,000	$ 341,400,000

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Property And Equipment, Net (Schedule Of Property And Equipment, Net) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Property and Equipment [Line Items]
Property and equipment	$ 899,300,000	$ 863,400,000
Less accumulated depreciation and amortization	(389,700,000)	(375,300,000)
Property and equipment, net	509,585,000	488,132,000
Land [Member]
Property and Equipment [Line Items]
Property and equipment	4,600,000	4,800,000
Building and Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and equipment	17,600,000	18,000,000
Machinery and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	752,200,000	727,100,000
Office Furniture and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	108,000,000	102,500,000
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment	$ 16,900,000	$ 11,000,000

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Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective income tax rate, continuing operations	38.00%	39.00%
Quarterly financial information, income taxes	In determining the quarterly provision for income taxes, management uses an estimated annual effective tax rate based on forecasted annual pre-tax income, permanent tax differences, statutory tax rates and tax planning opportunities in the various jurisdictions in which the Company operates. The impact of significant discrete items is separately recognized in the quarter(s) in which they occur.
Current deferred tax assets, net	$ 12,700,000		$ 16,300,000
Long-term deferred tax liabilities, net	$ 154,151,000		$ 155,012,000

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Related Party Transactions (Narrative) (Details) (USD $)	3 Months Ended		3 Months Ended				3 Months Ended					3 Months Ended
	Mar. 31, 2014 Management [Member] Investment [Member] Cross Country Pipeline [Member]	Nov. 08, 2013 Management [Member] Investment [Member] Cross Country Pipeline [Member]	Mar. 31, 2014 Management [Member] Lease Agreements [Member] Cross Country Pipeline [Member] Machinery and Equipment [Member]	Mar. 31, 2014 Management [Member] Employee Leasing Arrangements [Member] Related Customer [Member]	Mar. 31, 2013 Management [Member] Employee Leasing Arrangements [Member] Related Customer [Member]	Dec. 31, 2013 Management [Member] Employee Leasing Arrangements [Member] Related Customer [Member]	Mar. 31, 2014 Management [Member] Service Agreements [Member] Related Customer [Member]	Mar. 31, 2013 Management [Member] Service Agreements [Member] Related Customer [Member]	Dec. 31, 2013 Management [Member] Service Agreements [Member] Related Customer [Member]	Mar. 31, 2014 Management [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member] Other Long-Term Assets [Member]	Dec. 31, 2013 Management [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member] Other Long-Term Assets [Member]	Mar. 31, 2014 Board of Directors Chairman [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]	Mar. 31, 2013 Board of Directors Chairman [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]	Mar. 31, 2014 Chief Executive Officer [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]	Mar. 31, 2013 Chief Executive Officer [Member] Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Related Party Transaction [Line Items]
Cost method investment, original cost		$ 15,000,000
Cost method investments, additional information	14.85% ownership interest
Expenses from transactions with related party			900,000
Charges to related party				200,000	100,000
Due from related party				100,000		100,000
Revenue from related party							300,000	300,000
Accounts receivable, related party							400,000		400,000
Payments for life insurance policies												0	0	0	0
Carrying amount, life insurance policies										$ 10,100,000	$ 10,200,000

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Segments and Related Information (Reconciliation of EBITDA to Consolidated Income from Continuing Operations) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Less:
Interest expense, net	$ (12,003,000)	$ (10,045,000)
Depreciation and amortization	(33,494,000)	(31,753,000)
Income from continuing operations before income taxes	26,106,000	31,668,000
Continuing Operations [Member]
Segment Reporting Information [Line Items]
EBITDA	$ 71,600,000	$ 73,500,000

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information (Narrative) (Details)	3 Months Ended
	Mar. 31, 2014
Unsecured Debt [Member] | Senior Notes [Member] | 4.875% Senior Notes [Member]
Condensed Unaudited Consolidating Financial Statements [Line Items]
Debt instrument, interest rate	4.875%
Guarantor Subsidiaries [Member]
Condensed Unaudited Consolidating Financial Statements [Line Items]
Percentage of voting interests owned, guarantor subsidiaries	100.00%

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Segments and Related Information (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 segment	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Segment reporting, factors used to identify entity's reportable segments	MasTec presents its continuing operations in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. This structure is generally focused on broad end-user markets for MasTec's labor-based construction services.
Number of reportable segments	5
Segment reporting information, description of products and services	All five reportable segments derive their revenues from the engineering, installation and maintenance of infrastructure, primarily in North America.
Segment reporting, description of all other segments	The Other segment primarily includes small business units that perform construction services for a variety of end markets in Mexico and elsewhere internationally.
Revenue	$ 964,029,000	$ 918,648,000
Property and equipment, net	509,585,000		488,132,000
Intangible assets and goodwill, net	1,084,500,000		1,066,100,000
United States [Member] | Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Revenue	837,900,000	878,900,000
Property and equipment, net	461,800,000		436,900,000
Intangible assets and goodwill, net	995,800,000		973,300,000
Foreign Operations [Member] | Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Revenue	126,100,000	39,700,000
Property and equipment, net	47,800,000		51,200,000
Intangible assets and goodwill, net	88,600,000		92,700,000
Communications [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	The Communications segment performs engineering, construction and maintenance of communications infrastructure primarily related to wireless and wireline communications and install to the home, and to a lesser extent, infrastructure for electrical utilities.
Communications [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	447,100,000	424,900,000
Communications [Member] | Customer Concentration Risk [Member] | Revenue [Member] | Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Utilities customers, percentage of consolidated communications revenue	7.00%	8.30%
Oil and Gas [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	MasTec performs engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries through its Oil and Gas segment.
Oil and Gas [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	379,800,000	318,800,000
Electrical Transmission [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	The Electrical Transmission segment primarily serves the energy and utility industries through the engineering, construction and maintenance of electrical transmission lines and substations.
Electrical Transmission [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	80,100,000	84,600,000
Power Generation and Industrial [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	The Power Generation and Industrial segment primarily serves the energy and utility end markets and other end markets through the installation and construction of renewable power facilities, related electrical transmission infrastructure, ethanol facilities and various types of industrial infrastructure.
Power Generation and Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	$ 54,200,000	$ 88,900,000

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Stock-Based Compensation and Other Employee Benefit Plans (Summary of Stock-Based Compensation Expense and Related Tax Benefits) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 3,260,000		$ 2,357,000
Income Tax Effects:
Income tax benefit from stock-based compensation	4,500,000		1,500,000
Excess tax benefit from stock-based compensation	$ 3,246,000	[1]	$ 903,000	[1]

[1] Excess tax benefits, which represent cash flows from tax deductions in excess of the recorded tax effect of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

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Business, Basis of Presentation and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Nature of the Business

Nature of the Business

MasTec, Inc. (collectively with its subsidiaries, “MasTec” or the “Company”) is a leading infrastructure construction company operating mainly throughout North America across a range of industries. The Company’s primary activities include the engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure, such as: petroleum and natural gas pipeline infrastructure; wireless, wireline and satellite communications; electrical utility transmission and distribution; power generation; and industrial infrastructure. MasTec’s customers are in these industries. MasTec reports its results in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial; and (5) Other. See Note 15 - Segments and Related Information.

Basis of Presentation

Basis of Presentation

The accompanying condensed unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The accompanying condensed consolidated balance sheet as of December 31, 2013 is derived from the Company’s audited financial statements as of that date. Because certain information and footnote disclosures have been condensed or omitted, these condensed unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2013 contained in the Company’s most recent Annual Report on Form 10-K. In management’s opinion, all normal and recurring adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented have been included. Certain prior year amounts have been reclassified to conform to the current period presentation. Interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. The Company believes that the disclosures made in these condensed unaudited consolidated financial statements are adequate to make the information not misleading.

Reclassifications

Certain prior year amounts have been reclassified to conform to the current period presentation.

Principles of Consolidation

Principles of Consolidation

The accompanying condensed unaudited consolidated financial statements include MasTec, Inc. and its subsidiaries and include the accounts of all majority owned subsidiaries over which the Company exercises control and, when applicable, entities in which the Company has a controlling financial interest. Other parties’ interests in companies for which MasTec exercises control and has a controlling financial interest are reported as non-controlling interests within equity. Net income or loss attributable to non-controlling interests is reported as a separate line item below net income. The Company’s investments in entities in which the Company does not have a controlling interest, but has the ability to exert significant influence, are accounted for using the equity method of accounting. Equity method investments are recorded as long-term assets in the condensed unaudited consolidated balance sheets. Income or loss from these investments is recorded in other income or expense, net, in the condensed unaudited consolidated statements of operations. The cost method is used for investments in entities in which the Company does not have the ability to exert significant influence. All significant intercompany balances and transactions have been eliminated in consolidation. The assets and liabilities of foreign subsidiaries are translated into U.S. dollars at period-end exchange rates, with resulting translation gains or losses accumulated within other comprehensive income or loss. Revenue and expenses are translated into U.S. dollars at average rates of exchange prevailing during the applicable period. Gains or losses resulting from transactions executed in a foreign currency are included in other income or expense, net. The Company does not currently have any subsidiaries that operate in highly inflationary environments. The results of operations and financial position of any discontinued operations are aggregated and presented separately from the Company's continuing operations in the condensed unaudited consolidated financial statements for all periods presented.

Translation of Foreign Currencies

The assets and liabilities of foreign subsidiaries are translated into U.S. dollars at period-end exchange rates, with resulting translation gains or losses accumulated within other comprehensive income or loss. Revenue and expenses are translated into U.S. dollars at average rates of exchange prevailing during the applicable period. Gains or losses resulting from transactions executed in a foreign currency are included in other income or expense, net. The Company does not currently have any subsidiaries that operate in highly inflationary environments.

Management Estimates

Management Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Key estimates include: the recognition of revenue, in particular, on long-term construction contracts, including estimates of costs to complete projects and provisions for contract losses; allowances for doubtful accounts; accrued self-insured claims; estimated fair values of goodwill and intangible assets, acquisition-related contingent consideration, assets and liabilities classified as held-for-sale, convertible debt obligations and investments in cost and equity method investees; asset lives used in computing depreciation and amortization, including amortization of intangible assets; share-based compensation; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that such estimates are fair when considered in conjunction with the consolidated financial position and results of operations taken as a whole, actual results could differ from those estimates and such differences may be material to the condensed unaudited consolidated financial statements.

Significant Accounting Policies

Significant Accounting Policies

Revenue Recognition

Revenues are derived from projects performed under master and other service agreements as well as from fixed price contracts for specific projects or jobs requiring the construction and installation of an entire infrastructure system or specified units within an entire infrastructure system. Revenue and related costs for master and other service agreements billed on a time and materials basis are recognized as the services are rendered. The Company also performs services under master and other service agreements on a fixed fee basis, under which MasTec furnishes specified units of service for a fixed price per unit of service and revenue is recognized as the services are rendered. Revenues from fixed price contracts provide for a fixed amount of revenue for the entire project, subject to certain additions for changed scope or specifications. Revenues from these contracts are recognized using the percentage-of-completion method. Under this method, the percentage of revenue to be recognized for a given project is measured by the percentage of costs incurred to date on the contract to the total estimated costs for the contract. Such contracts provide that the customer accept completion of progress to date and compensate the Company for services rendered, which may be measured in terms of costs incurred, units installed, hours expended or some other measure of progress.

The Company may incur costs subject to change orders, whether approved or unapproved by the customer, and/or claims related to certain contracts. Management determines the probability that such costs will be recovered based upon evidence such as engineering studies and legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer. The Company treats project costs as a cost of contract performance in the period incurred if it is not probable that the costs will be recovered, or defers costs and/or recognizes revenue up to the amount of the related cost if it is probable that the contract price will be adjusted and can be reliably estimated. As of March 31, 2014 and December 31, 2013, the Company had approximately $163 million and $79 million, respectively, of change orders and/or claims that had been included as contract price adjustments on certain contracts that were in the process of being negotiated in the normal course of business, including arbitration and other proceedings. These contract price adjustments represent management's best estimate of additional contract revenues that have been earned and that management believes are probable of collection. The amounts ultimately realized upon final acceptance by its customers could be higher or lower than such estimated amounts, which are primarily expected to be billed and collected within one year. The $84 million increase in change orders and/or claims since December 31, 2013 is primarily due to a project in our Oil and Gas segment, which amounts have been approved in principle subsequent to March 31, 2014.

Except for adoption of the accounting pronouncement discussed below, there have been no material changes to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

Revenue Recognition

Revenue Recognition

Revenues are derived from projects performed under master and other service agreements as well as from fixed price contracts for specific projects or jobs requiring the construction and installation of an entire infrastructure system or specified units within an entire infrastructure system. Revenue and related costs for master and other service agreements billed on a time and materials basis are recognized as the services are rendered. The Company also performs services under master and other service agreements on a fixed fee basis, under which MasTec furnishes specified units of service for a fixed price per unit of service and revenue is recognized as the services are rendered. Revenues from fixed price contracts provide for a fixed amount of revenue for the entire project, subject to certain additions for changed scope or specifications. Revenues from these contracts are recognized using the percentage-of-completion method. Under this method, the percentage of revenue to be recognized for a given project is measured by the percentage of costs incurred to date on the contract to the total estimated costs for the contract. Such contracts provide that the customer accept completion of progress to date and compensate the Company for services rendered, which may be measured in terms of costs incurred, units installed, hours expended or some other measure of progress.

The Company may incur costs subject to change orders, whether approved or unapproved by the customer, and/or claims related to certain contracts. Management determines the probability that such costs will be recovered based upon evidence such as engineering studies and legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer. The Company treats project costs as a cost of contract performance in the period incurred if it is not probable that the costs will be recovered, or defers costs and/or recognizes revenue up to the amount of the related cost if it is probable that the contract price will be adjusted and can be reliably estimated. As of March 31, 2014 and December 31, 2013, the Company had approximately $163 million and $79 million, respectively, of change orders and/or claims that had been included as contract price adjustments on certain contracts that were in the process of being negotiated in the normal course of business, including arbitration and other proceedings. These contract price adjustments represent management's best estimate of additional contract revenues that have been earned and that management believes are probable of collection. The amounts ultimately realized upon final acceptance by its customers could be higher or lower than such estimated amounts, which are primarily expected to be billed and collected within one year. The $84 million increase in change orders and/or claims since December 31, 2013 is primarily due to a project in our Oil and Gas segment, which amounts have been approved in principle subsequent to March 31, 2014.

New Accounting Pronouncements

New Accounting Pronouncements

Accounting Standards Not Yet Adopted

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”). ASU 2014-08 changes the requirements for reporting discontinued operations and requires additional disclosures about discontinued operations. Only disposals of components of an entity representing a strategic shift that has, or will have, a major effect on an entity’s operations and financial results should be reported as discontinued operations under ASU 2014-08. Examples include a disposal of a major geographical area, a major line of business, or a major equity method investment. ASU 2014-08 also requires expanded disclosures about discontinued operations and requires disclosures about individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. The Company is currently evaluating the potential impact of this ASU on its condensed unaudited consolidated financial statements.

Recently Adopted Accounting Pronouncements

In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force) (“ASU 2013-11”).  ASU 2013-11 provides guidance on the presentation in the financial statements of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, and explains that unrecognized tax benefits should be presented as a reduction to deferred tax assets for net operating loss carryforwards, similar tax losses or tax credit carryforwards. To the extent a net operating loss carryforward, similar tax loss or tax credit carryforward is not available as of the reporting date under the tax law of the applicable jurisdiction, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists as of the reporting date. ASU 2013-11 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Retrospective application is permitted. The Company adopted ASU 2013-11 as of January 1, 2014. The adoption of this ASU did not have a material impact on the condensed unaudited consolidated financial statements.

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Goodwill And Other Intangible Assets (Rollforward of Other Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Other Intangible Assets [Line Items]
Other intangible assets, gross carrying amount				$ 245,100,000
Accumulated amortization, amortizing intangible assets				(79,500,000)
Other Intangible Assets [Rollforward]
Other intangible assets, net, beginning balance	165,606,000
Additions from new business combinations, other intangible assets	12,000,000
Amortization of intangible assets	(4,600,000)		(4,200,000)
Other intangible assets, net, ending balance	171,562,000
Other Intangible Assets [Member]
Other Intangible Assets [Rollforward]
Currency translation adjustments, other intangible assets	(1,400,000)
Customer Relationships and Backlog [Member]
Other Intangible Assets [Line Items]
Other intangible assets, amortizing, gross carrying amount				128,400,000
Accumulated amortization, amortizing intangible assets				(67,700,000)
Other Intangible Assets [Rollforward]
Other intangible assets, net, amortizing, beginning balance	60,700,000
Additions from new business combinations, amortizing intangible assets	11,700,000
Amortization of intangible assets	(4,200,000)
Currency translation adjustments, amortizing intangible assets	(200,000)
Other intangible assets, net, amortizing, ending balance	68,000,000
Other Finite-Lived Intangible Assets [Member]
Other Intangible Assets [Line Items]
Other intangible assets, amortizing, gross carrying amount				22,500,000	[1]
Accumulated amortization, amortizing intangible assets				(11,800,000)	[1]
Other Intangible Assets [Rollforward]
Other intangible assets, net, amortizing, beginning balance	10,700,000	[1]
Additions from new business combinations, amortizing intangible assets	300,000	[1]
Amortization of intangible assets	(400,000)	[1]
Currency translation adjustments, amortizing intangible assets	(100,000)	[1]
Other intangible assets, net, amortizing, ending balance	10,500,000	[1]
Trade Names [Member]
Other Intangible Assets [Line Items]
Other intangible assets, non-amortizing, gross carrying amount	34,800,000
Other Intangible Assets [Rollforward]
Other intangible assets, non-amortizing, beginning balance	34,800,000
Additions from new business combinations, non-amortizing intangible assets	0
Currency translation adjustments, non-amortizing intangible assets	0
Other intangible assets, non-amortizing, ending balance	34,800,000
Pre-Qualifications [Member]
Other Intangible Assets [Line Items]
Other intangible assets, non-amortizing, gross carrying amount	58,300,000
Other Intangible Assets [Rollforward]
Other intangible assets, non-amortizing, beginning balance	59,400,000
Additions from new business combinations, non-amortizing intangible assets	0
Currency translation adjustments, non-amortizing intangible assets	(1,100,000)
Other intangible assets, non-amortizing, ending balance	$ 58,300,000

[1] Consists principally of trade names and non-compete agreements.

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Earnings Per Share (Schedule Of Convertible Note Premium Share Information) (Details) (Convertible Debt [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
2011 4.0% Notes [Member]
Earnings Per Share [Line Items]
Number of conversion shares, principal amount	6,683	6,683
Weighted average premium value	$ 148,360	$ 86,316
Weighted average equivalent premium shares	3,909	3,010
2011 4.0% Notes [Member] | Weighted Average [Member]
Earnings Per Share [Line Items]
Weighted average actual per share price	$ 37.96	$ 28.68
2011 4.25% Notes [Member]
Earnings Per Share [Line Items]
Number of conversion shares, principal amount	6,268	6,268
Weighted average premium value	$ 140,925	$ 82,735
Weighted average equivalent premium shares	3,712	2,885
2011 4.25% Notes [Member] | Weighted Average [Member]
Earnings Per Share [Line Items]
Weighted average actual per share price	$ 37.96	$ 28.68

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Equity (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	$ (13,286)	$ (5,501)
Activity before reclassifications, net of tax	(5,335)	(603)
Reclassifications, net of tax	0	0
Activity, net of tax	(5,335)	(603)
Accumulated other comprehensive loss, ending balance	(18,621)	(6,104)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	(7,998)	(105)
Activity before reclassifications, net of tax	(5,335)	(824)
Reclassifications, net of tax	0	0
Activity, net of tax	(5,335)	(824)
Accumulated other comprehensive loss, ending balance	(13,333)	(929)
Available-for-Sale-Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	(5,288)	(5,396)
Activity before reclassifications, net of tax	0	221
Reclassifications, net of tax	0	0
Activity, net of tax	0	221
Accumulated other comprehensive loss, ending balance	$ (5,288)	$ (5,175)

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Segments and Related Information (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summarized financial information for MasTec’s reportable segments is presented and reconciled to consolidated continuing operations financial information for total MasTec in the following tables (in millions):

	For the Three Months Ended March 31,
Revenue:	2014		2013
Communications	$	447.1	$	424.9
Oil and Gas	379.8		318.8
Electrical Transmission	80.1		84.6
Power Generation and Industrial	54.2		88.9
Other	2.8		2.3
Eliminations	0.0		(0.9		)
Consolidated revenue	$	964.0	$	918.6

Revenue generated by utilities customers represented 7.0% and 8.3% of Communications segment revenue for the three month periods ended March 31, 2014 and 2013, respectively.

	For the Three Months Ended March 31,
EBITDA:	2014			2013
Communications	$	43.4		$	46.4
Oil and Gas	34.9			42.4
Electrical Transmission	3.5			3.4
Power Generation and Industrial	0.5			(0.2		)
Other	0.2			0.1
Corporate	(10.9		)	(18.6		)
Consolidated EBITDA	$	71.6		$	73.5

	For the Three Months Ended March 31,
Depreciation and Amortization:	2014		2013
Communications	$	9.9	$	8.2
Oil and Gas	18.1		18.7
Electrical Transmission	2.8		2.3
Power Generation and Industrial	1.5		1.7
Corporate	1.2		0.9
Consolidated Depreciation and Amortization	$	33.5	$	31.8

Reconciliation of EBITDA to Consolidated Income from Continuing Operations

The following table presents a reconciliation of EBITDA to consolidated income from continuing operations before income taxes (in millions):

	For the Three Months Ended March 31,
EBITDA Reconciliation:	2014			2013
EBITDA	$	71.6		$	73.5
Less:
Interest expense, net	(12.0		)	(10.0		)
Depreciation and amortization	(33.5		)	(31.8		)
Income from continuing operations before income taxes	$	26.1		$	31.7

Schedule of Significant Customers, Revenue Concentration

Revenue concentration information for significant customers as a percent of total consolidated revenue was as follows:

	For the Three Months Ended March 31,
	2014	2013
Customer:
AT&T	22%	18%
DIRECTV®	14%	16%
Enbridge, Inc.	14%	12%

The Company's relationship with AT&T is based upon master service agreements, other service agreements and construction/installation contracts for AT&T's wireless, wireline and home security and automation businesses. Revenue from AT&T is included in the Communications segment.The Company's relationship with DIRECTV® is based upon an agreement to provide installation and maintenance services for DIRECTV®. Revenue from DIRECTV® is included in the Communications segment.The Company's relationship with Enbridge, Inc. is based upon various construction contracts for natural gas pipelines. Revenue from Enbridge, Inc. is included in the Oil and Gas segment.

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Fair Value Of Financial Instruments (Schedule Of Fair Values Of Financial Assets And Liabilities Measured On A Recurring Basis) (Details) (Fair Value [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Life insurance surrender values	$ 5.5	$ 5.3
Earn-out Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Acquisition-related contingent consideration	170.3	162.9
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Life insurance surrender values	5.5	5.3
Level 3 [Member] | Earn-out Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Acquisition-related contingent consideration	$ 170.3	$ 162.9

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Stock-Based Compensation and Other Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Shares available for grant or issuance	6,243,047	6,243,047
Intrinsic value of stock options exercised		$ 6.3	$ 3.5
Proceeds from stock options exercised		0.6	1.9
Restricted Stock Plan [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Unearned compensation	24.3	24.3
Unearned compensation, weighted average expected recognition period	1 year 7 months 6 days
Intrinsic value of vested awards		$ 5.9	$ 0.7
Employee Stock Option Plan [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock-based compensation, percentage vested		100.00%
Employee Stock Purchase Plan [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock-based compensation plan, description		The Company's employee stock purchase plans allow qualified employees to purchase MasTec, Inc. common stock at 85% of the fair market value of the common stock at the lower of (i) the date of commencement of the offering period or (ii) the last day of the exercise period, as defined in the plan documents.
Stock-based compensation, purchase price of common stock, percentage of fair value		85.00%
Stock-based compensation, fair value assumptions, method used		The fair value of purchases under the Company's employee stock purchase plans is estimated using the Black-Scholes option-pricing valuation model.

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Debt (Credit Facility) (Narrative) (Details) (USD $)	0 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Debt Instrument [Line Items]
Line of credit facility, expiration date			Oct. 29, 2018
Line of credit facility, maximum borrowing capacity	$ 750,000,000		$ 750,000,000
Letters of credit outstanding	134,700,000	134,800,000	134,700,000
Line of credit facility, remaining borrowing capacity	486,800,000	562,100,000	486,800,000
Unused credit facility fee	0.30%	0.30%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, amount outstanding	128,600,000	53,000,000	128,600,000
Revolving Credit Facility [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate	2.08%	2.14%	2.08%
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, capacity available for issuance of letters of credit	315,300,000	315,200,000	315,300,000
Letter of Credit [Member] | Performance Standby [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate	0.75%	0.75%	0.75%
Letter of Credit [Member] | Financial Standby [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate	1.50%	1.50%	1.50%
Canadian Dollars [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, revolving loan sublimit	$ 100,000,000		$ 100,000,000

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Discontinued Operations (Summary of Assets and Liabilities) (Details) (Globetec [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Globetec [Member]
Discontinued Operations Disclosures [Line Items]
Current assets	$ 3.4	$ 2.3
Long-term assets	10.1	10.1
Assets of discontinued operations	13.5	12.4
Current liabilities of discontinued operations	$ 1.3	$ 1.2

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Acquisitions

3 Months Ended

Mar. 31, 2014

Business Combinations [Abstract]

Acquisitions

Acquisitions

Allocations of purchase prices for acquisitions are based on estimates of the fair value of consideration paid and of the net assets acquired and are subject to adjustment upon finalization of these fair value estimates. The Company acquired several businesses during 2013 and 2014, as discussed below and in Note 3 - Acquisitions in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013. As of March 31, 2014, the allocations of purchase price to the fair values of tangible and intangible assets and liabilities, including the estimated values of contingent earn-out obligations and the estimated useful lives of acquired assets for these acquisitions are provisional and remain preliminary. Management continues to assess the valuation of these items and any ultimate purchase price adjustments that may result based on the final net assets and net working capital of the acquired businesses, as prescribed in the corresponding purchase agreements.

The Company will revise its preliminary allocations for acquired businesses if new information is obtained about the facts and circumstances existing as of the date of acquisition, or for purchase price adjustments based on the final net assets and net working capital of the acquired businesses, as prescribed in the applicable purchase agreement. Such adjustments result in the recognition of, or adjust the fair values of, acquired assets and assumed liabilities, which results in the revision of comparative prior period financial information. These measurement period adjustments are presented as if the adjustments had been taken into account as of the date of acquisition. All changes that do not qualify as measurement period adjustments are included in current period results. See table below pertaining to measurement period adjustments associated with the Company's 2013 acquisitions.

2014 Acquisitions

Effective January 1, 2014, MasTec acquired a telecommunications services firm that specializes in the engineering, installation, furnishing and integration of telecommunications equipment for an aggregate purchase price composed of approximately $23.8 million in cash and a five year earn-out, valued at $8.7 million as of the date of acquisition. This company is included in MasTec's Communications segment.

2013 Acquisitions

Big Country

Effective May 1, 2013, MasTec acquired all of the issued and outstanding interests of Big Country Energy Services, Inc. and its affiliated operating companies (collectively, "Big Country").Big Country is a North American oil and gas pipeline and facility construction services company, headquartered in Calgary, Alberta, Canada.

Other 2013 Acquisitions

Effective April 1, 2013, MasTec acquired a former subcontractor to its wireless business, which provides self-perform communications tower construction, installation, maintenance and other services in support of telecommunications infrastructure construction in the Company's Communications segment. In addition, effective August 1, 2013, MasTec acquired an electrical transmission services company, which focuses primarily on substation construction activities and is included within the Company's Electrical Transmission segment.

Measurement Period Adjustments

Measurement period adjustments associated with the Company's 2013 acquisitions have been reflected in the Company's December 31, 2013 consolidated balance sheet as follows (in millions):

As of December 31, 2013	As Previously Reported		Measurement Period Adjustments		As Revised
Current assets	$	1,306.0	$	0.2	$	1,306.2
Goodwill	$	899.4	$	1.1	$	900.5
Current liabilities	$	825.5	$	1.2	$	826.7
Long-term deferred tax liabilities, net	$	154.9	$	0.1	$	155.0

Unaudited Pro Forma Information

The following unaudited supplemental pro forma financial information includes the results of operations of each of the companies acquired in 2014 and 2013 and is presented as if the acquired companies had been consolidated as of the beginning of the year immediately preceding the date of acquisition. The unaudited supplemental pro forma financial information has been provided for illustrative purposes only. The unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented, or of the results that may be achieved by the combined companies in the future. Future results may vary significantly from the results reflected in the following unaudited supplemental pro forma financial information because of future events and transactions, as well as other factors, many of which are beyond MasTec’s control.

The unaudited supplemental pro forma financial information presented below has been prepared by adjusting the historical results of MasTec to include the historical results of the acquired businesses described above. The unaudited supplemental pro forma combined historical results were then adjusted (i) to remove one-time acquisition costs; (ii) to increase amortization expense resulting from the incremental intangible assets acquired in such acquisitions; (iii) to increase interest expense as a result of the cash consideration paid; and (iv) to reduce interest expense from the repayment of acquired debt. The unaudited supplemental pro forma financial information does not include any adjustments to reflect the impact of cost savings or other synergies that may result from these acquisitions. As noted above, the unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented or that may be achieved by the combined companies in the future.

	For the Three Months Ended March 31,
	2014		2013
Pro forma financial information:	(unaudited, in millions)
Revenue	$	964.0	$	1,029.1
Net income from continuing operations	$	16.2	$	24.1

Results of Businesses Acquired

Revenues and net income resulting from the year over year incremental impact of acquired businesses, which are included within the Company's consolidated results of operations for the years indicated, are as follows (in millions):

	For the Three Months Ended March 31,
	2014		2013
Year over year impact of acquired businesses:	(unaudited, in millions)
Revenue	$	119.8	$	43.1
Net income from continuing operations	$	1.0	$	1.8

The above results do not include acquisition costs of $0.2 million and $0.4 million for the three month periods ended March 31, 2014 and March 31, 2013, respectively. The above results also do not include interest expense associated with consideration paid for these acquisitions.

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Debt (Senior Convertible Notes) (Narrative) (Details) (Convertible Debt [Member], Unsecured Debt [Member], USD $) In Millions, unless otherwise specified			3 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2014 2011 Convertible Notes [Member]	Dec. 31, 2013 2011 Convertible Notes [Member]	Mar. 31, 2014 2011 4.0% Notes [Member]	Mar. 31, 2014 2011 4.25% Notes [Member]	Mar. 31, 2014 Total Convertible Debt [Member] Plan [Member]	Mar. 31, 2014 Total Convertible Debt [Member] Plan [Member]
Debt Instrument [Line Items]
Unamortized debt discount and financing costs	$ 2.7	$ 4.0
Debt instrument, maturity date			Jun. 15, 2014	Dec. 15, 2014
Debt, intent to refinance, amount					$ 215.0
Debt, intent to refinance, description						The Company expects to refinance the $215.0 million principal amount of its senior convertible notes on a long-term basis either through its 2013 Credit Facility or through other sources of available funding and, therefore, has reflected the carrying amounts of these notes within long-term debt in the Company's condensed unaudited consolidated balance sheets.

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Acquisitions (Narrative) (Details) (USD $)	3 Months Ended					0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Earn-out Arrangements [Member]	Mar. 31, 2013 Earn-out Arrangements [Member]	Mar. 31, 2014 2014 and 2013 Acquisitions [Member]	Jan. 02, 2014 2014 Acquisitions [Member]	Mar. 31, 2014 2014 Acquisitions [Member]	Jan. 02, 2014 2014 Acquisitions [Member] Earn-out Arrangements [Member]	Mar. 31, 2014 Big Country [Member]	May 02, 2013 Big Country [Member]	Mar. 31, 2014 Other 2013 Acquisitions [Member]
Business Acquisition [Line Items]
Business combination, provisional information, initial accounting incomplete, items					As of March 31, 2014, the allocations of purchase price to the fair values of tangible and intangible assets and liabilities, including the estimated values of contingent earn-out obligations and the estimated useful lives of acquired assets for these acquisitions are provisional and remain preliminary. Management continues to assess the valuation of these items and any ultimate purchase price adjustments that may result based on the final net assets and net working capital of the acquired businesses, as prescribed in the corresponding purchase agreements.
Business combination, provisional information, initial accounting incomplete, reasons	The Company will revise its preliminary allocations for acquired businesses if new information is obtained about the facts and circumstances existing as of the date of acquisition, or for purchase price adjustments based on the final net assets and net working capital of the acquired businesses, as prescribed in the applicable purchase agreement.
Business combination, description of acquired entity							Effective January 1, 2014, MasTec acquired a telecommunications services firm that specializes in the engineering, installation, furnishing and integration of telecommunications equipment for an aggregate purchase price composed of approximately $23.8 million in cash and a five year earn-out, valued at $8.7 million as of the date of acquisition. This company is included in MasTec's Communications segment.		Big Country is a North American oil and gas pipeline and facility construction services company, headquartered in Calgary, Alberta, Canada.		Effective April 1, 2013, MasTec acquired a former subcontractor to its wireless business, which provides self-perform communications tower construction, installation, maintenance and other services in support of telecommunications infrastructure construction in the Company's Communications segment. In addition, effective August 1, 2013, MasTec acquired an electrical transmission services company, which focuses primarily on substation construction activities and is included within the Company's Electrical Transmission segment.
Acquisition payments in cash						$ 23,800,000
Estimated fair value of contingent consideration			8,700,000	0				8,700,000
Earn-out period								5 years
Effective date of acquisition									May 01, 2013
Business combination, percentage of voting interests acquired										100.00%
Business combination, name of acquired entity									Big Country Energy Services, Inc. and its affiliated operating companies (collectively, "Big Country").
Business combination, acquisition costs	$ 200,000	$ 400,000

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Rollforward of Goodwill by Segment

The following table provides a reconciliation of changes in goodwill by reportable segment (in millions):

	Communications		Oil and Gas			Electrical Transmission		Power Generation and Industrial		Total Goodwill
Balance as of December 31, 2013	$	327.9	$	305.2		$	149.8	$	117.6	$	900.5
Additions from new business combinations	14.5		—			—		—		14.5
Currency translation adjustments	—		(2.1		)	—		—		(2.1		)
Balance as of March 31, 2014	$	342.4	$	303.1		$	149.8	$	117.6	$	912.9

Rollforward of Other Intangible Assets

The following table provides a reconciliation of changes in other intangible assets (in millions):

	Other Intangible Assets
	Non-amortizing					Amortizing
	Trade Names		Pre-Qualifications			Customer Relationships and Backlog			Other (a)			Total
Other intangible assets, gross carrying amount as of December 31, 2013	$	34.8	$	59.4		$	128.4		$	22.5		$	245.1
Accumulated amortization						$	(67.7	)	$	(11.8	)	$	(79.5	)
Other intangible assets, net, as of December 31, 2013	$	34.8	$	59.4		$	60.7		$	10.7		$	165.6
Additions from new business combinations	—		—			11.7			0.3			12.0
Amortization expense						(4.2		)	(0.4		)	(4.6		)
Currency translation adjustments	—		(1.1		)	(0.2		)	(0.1		)	(1.4		)
Other intangible assets, net, as of March 31, 2014	$	34.8	$	58.3		$	68.0		$	10.5		$	171.6

(a) Consists principally of trade names and non-compete agreements.

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Discontinued Operations (Tables) (Globetec [Member])

3 Months Ended

Mar. 31, 2014

Globetec [Member]

Discontinued Operations Disclosures [Line Items]

Summary of Assets, Liabilities and Results of Operations from Discontinued Operations

The following table contains a summary of the contingent assets and liabilities associated with Globetec that were retained by the Company as of March 31, 2014 and as of December 31, 2013 (in millions):

	March 31, 2014		December 31, 2013
Current assets	$	3.4	$	2.3
Long-term assets	10.1		10.1
Assets of discontinued operations	$	13.5	$	12.4
Current liabilities of discontinued operations	$	1.3	$	1.2

The following table presents results from discontinued operations associated with the Globetec operation for the periods indicated (in millions):

	For the Three Months Ended March 31, 2013
Revenue	$	6.3
Loss from operations, before tax	(1.2		)
Benefit from income taxes	0.3
Net loss from discontinued operations	$	(0.9	)

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Debt (Schedule of Long Term Debt Instruments) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Line of credit facility, expiration date	Oct. 29, 2018
Capital lease obligations	$ 123,200,000	$ 126,000,000
Total debt	894,200,000	816,800,000
Less current maturities	(52,949,000)	(51,376,000)
Long-term debt	841,335,000	765,425,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, amount outstanding	128,600,000	53,000,000
Senior Notes [Member] | 4.875% Senior Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Mar. 15, 2023
Carrying value of debt	400,000,000	400,000,000
Convertible Debt [Member] | 2011 4.0% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Jun. 15, 2014
Carrying value of debt	104,600,000	103,800,000
Convertible Debt [Member] | 2011 4.25% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 15, 2014
Carrying value of debt	95,100,000	94,500,000
Convertible Debt [Member] | 2009 4.0% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Jun. 15, 2014
Carrying value of debt	9,600,000	9,600,000
Convertible Debt [Member] | 2009 4.25% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 15, 2014
Carrying value of debt	3,000,000	3,000,000
Capital Lease Obligations [Member] | Maximum [Member]
Debt Instrument [Line Items]
Lease expiration date	Mar. 30, 2020
Notes Payable [Member] | Equipment [Member]
Debt Instrument [Line Items]
Carrying value of debt	$ 30,100,000	$ 26,900,000
Notes Payable [Member] | Equipment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	May 01, 2018

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Acquisitions (Schedule of Measurement Period Adjustments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Measurement Period Adjustments [Line Items]
Current assets	$ 1,357,936	$ 1,306,223
Goodwill	912,885	900,454
Current liabilties	820,389	826,746
Long-term deferred tax liabilities, net	154,151	155,012
As Previously Reported [Member]
Measurement Period Adjustments [Line Items]
Current assets		1,306,000
Goodwill		899,400
Current liabilties		825,500
Long-term deferred tax liabilities, net		154,900
Adjustments [Member] | Measurement Period Adjustments [Member] | 2013 Acquisitions [Member]
Measurement Period Adjustments [Line Items]
Current assets		200
Goodwill		1,100
Current liabilties		1,200
Long-term deferred tax liabilities, net		$ 100

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Schedule Of Fair Values Of Financial Assets And Liabilities Measured On A Recurring Basis

The fair values of financial assets and liabilities measured on a recurring basis were determined using the following inputs as of the dates indicated (in millions):

			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of March 31, 2014		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.5	$	5.5
Liabilities
Acquisition-related contingent consideration	$	170.3				$	170.3
			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2013		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.3	$	5.3
Liabilities
Acquisition-related contingent consideration	$	162.9				$	162.9

Schedule of Fair Values of Financial Assets And Liabilities Measured On A Non-Recurring Basis

Carrying amounts and estimated fair values of selected financial instruments measured on a non-recurring basis as of the dates indicated were as follows (in millions):     

	March 31, 2014				December 31, 2013
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
4.875% Senior Notes	$	400.0	$	390.5	$	400.0	$	380.0
2009 Convertible Notes	$	12.6	$	35.0	$	12.6	$	26.6
2011 Convertible Notes	$	199.7	$	563.2	$	198.3	$	428.3

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Accounts Receivable, Net of Allowance (Tables) (Trade Accounts Receivable [Member])

3 Months Ended

Mar. 31, 2014

Trade Accounts Receivable [Member]

Schedule of Accounts Receivable, Net of Allowance [Line Items]

Schedule Of Accounts Receivable, Net of Allowance

The following table provides details of accounts receivable, net of allowance, as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Contract billings	$	627.1		$	606.5
Retainage	135.6			159.3
Costs and earnings in excess of billings	448.6			384.6
Accounts receivable, gross	$	1,211.3		$	1,150.4
Less allowance for doubtful accounts	(15.7		)	(15.8		)
Accounts receivable, net	$	1,195.6		$	1,134.6

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Earnings Per Share

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Basic earnings per share is computed by dividing earnings available to MasTec’s common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share is computed by dividing earnings by the number of fully diluted shares, which includes the effect of dilutive potential issuances of common shares as determined using earnings from continuing operations. The potential issuance of common shares upon the exercise, conversion or vesting of outstanding stock options and unvested restricted share awards, as calculated under the treasury stock method, as well as shares associated with the Company’s outstanding convertible debt securities, may be dilutive.

The following table provides details underlying the Company’s earnings per share calculations for the periods indicated (in thousands):

	For the Three Months Ended March 31,
	2014			2013
Net income attributable to MasTec:
Net income, continuing operations - basic (a)	$	16,145		$	19,317
Interest expense, net of tax, 2009 Convertible Notes	78			77
Net income, continuing operations - diluted	$	16,223		$	19,394
Net loss from discontinued operations - basic and diluted (a)	(122		)	(947		)
Net income attributable to MasTec - diluted	$	16,101		$	18,447
Weighted average shares outstanding:
Weighted average shares outstanding - basic	77,345			76,608
Dilutive common stock equivalents	850			785
Dilutive premium shares, 2011 Convertible Notes	7,621			5,895
Dilutive shares, 2009 Convertible Notes	806			806
Weighted average shares outstanding - diluted	86,622			84,094

(a) Calculated as total net income less amounts attributable to non-controlling interests.

Outstanding Convertibles Notes - Diluted Share Impact

The Company has $215 million aggregate principal amount of senior convertible notes outstanding, composed of $202.3 million of senior convertible notes issued in 2011 (the “2011 Convertible Notes”) and approximately $12.6 million of senior convertible notes issued in 2009 (the “2009 Convertible Notes”). Dilutive shares associated with the 2009 Convertible Notes are attributable to the underlying principal amounts. The number of common shares issuable upon conversion of the Company’s 2009 Convertible Notes is reflected in the calculation of weighted average diluted earnings per share for the corresponding periods by application of the “if-converted” method to the extent its effect on the computation of earnings per share from continuing operations is dilutive. Under the “if-converted” method, net income from continuing operations is adjusted to add back the after-tax amount of interest recognized for the period associated with the convertible notes, and correspondingly, the convertible notes are assumed to have been converted with the resulting common shares added to the number of weighted average shares outstanding.Due to the optional cash settlement feature of the 2011 Convertible Notes and the Company's intent to settle the principal amount of such notes in cash, the conversion shares underlying the outstanding principal amount of the 2011 Convertible Notes, totaling approximately 13.0 million shares, are not required to be included in the Company's diluted share count. If, however, the average price per share of the Company's common stock exceeds the respective conversion prices of the 2011 Convertible Notes, then the resulting premium is translated into shares, referred to as “premium shares,” the number of which is required to be included in the Company's diluted share count. The number of premium shares included in our diluted share count varies with fluctuations in our share price. Higher share prices result in a greater number of premium shares. The Company’s weighted average share price for the three month periods ended March 31, 2014 and 2013 exceeded the conversion prices of the 2011 Convertible Notes, and as a result, dilutive premium shares have been included in the Company's share count for the corresponding periods.

The 2011 Convertible Notes consist of $105.3 million principal amount of 4.0% senior convertible notes, convertible at $15.76 per share (the “2011 4.0% Notes”), and $97.0 million principal amount of 4.25% senior convertible notes, convertible at $15.48 per share (the “2011 4.25% Notes”). The calculations underlying the number of premium shares included in the Company’s diluted share count for the periods indicated are as follows (in thousands, except per share amounts):

	As of and for the Three Months Ended March 31,
	2014				2013
Premium Share Information:	2011 4.0% Notes		2011 4.25% Notes		2011 4.0% Notes		2011 4.25% Notes
Number of conversion shares, principal amount	6,683		6,268		6,683		6,268
Weighted average actual per share price	$	37.96	$	37.96	$	28.68	$	28.68
Weighted average premium value	$	148,360	$	140,925	$	86,316	$	82,735
Weighted average equivalent premium shares	3,909		3,712		3,010		2,885

Diluted Shares, Other Information

For the three month period ended March 31, 2014, a total of 61,226 weighted average anti-dilutive common stock equivalents were not included in the Company's diluted earnings per share calculations. There were no anti-dilutive common stock equivalents for the three month period ended March 31, 2013.

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Debt (Tables)

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long Term Debt Instruments

The following table provides details of the carrying values of debt as of the dates indicated (in millions):

Description	Maturity Date	March 31, 2014			December 31, 2013
Credit facility	October 29, 2018	$	128.6		$	53.0
4.875% senior notes	March 15, 2023	400.0			400.0
2011 4.0% senior convertible notes	June 15, 2014	104.6			103.8
2011 4.25% senior convertible notes	December 15, 2014	95.1			94.5
2009 4.0% senior convertible notes	June 15, 2014	9.6			9.6
2009 4.25% senior convertible notes	December 15, 2014	3.0			3.0
Capital lease obligations, weighted average interest rate of 2.9%	In installments through March 30, 2020	123.2			126.0
Notes payable for equipment, weighted average interest rate of 3.0%	In installments through May 1, 2018	30.1			26.9
Total debt		$	894.2		$	816.8
Less current maturities		(52.9		)	(51.4		)
Long-term debt		$	841.3		$	765.4

Schedule of Interest Expense, Net

The following table provides details of interest expense, net, for the periods indicated (in millions):

	For the Three Months Ended March 31,
	2014		2013
Interest expense:
Contractual and other interest expense	$	9.7	$	7.9
Accretion of senior convertible note discount	1.4		1.3
Amortization of deferred financing costs	0.9		0.9
Total interest expense	$	12.0	$	10.1
Interest income	0.0		(0.1		)
Interest expense, net	$	12.0	$	10.0

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Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended										0 Months Ended						3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Uninsured Risk [Member] Other Non-Current Assets [Member]	Dec. 31, 2013 Uninsured Risk [Member] Other Non-Current Assets [Member]	Mar. 31, 2014 Uninsured Risk [Member] Workers Compensation, General And Automobile Policies [Member]	Dec. 31, 2013 Uninsured Risk [Member] Workers Compensation, General And Automobile Policies [Member]	Mar. 31, 2014 Uninsured Risk [Member] Group Insurance Policies [Member] Health Insurance [Member]	Dec. 31, 2013 Uninsured Risk [Member] Group Insurance Policies [Member] Health Insurance [Member]	Mar. 31, 2014 Performance Standby [Member]	Dec. 31, 2013 Performance Standby [Member]	Mar. 31, 2014 Performance Standby [Member] Plan [Member]	Dec. 31, 2013 Performance Standby [Member] Plan [Member]	Mar. 31, 2014 Financial Standby [Member] Uninsured Risk [Member]	Dec. 31, 2013 Financial Standby [Member] Uninsured Risk [Member]	Mar. 31, 2014 Surety Bond [Member] Uninsured Risk [Member] Workers Compensation [Member]	Dec. 31, 2013 Surety Bond [Member] Uninsured Risk [Member] Workers Compensation [Member]	Mar. 31, 2014 Subsidiary [Member]	Mar. 31, 2014 Pending Litigation [Member] Sunlight Entities [Member]	Mar. 31, 2014 Pending Litigation [Member] Sunlight Entities [Member] Construction Contracts [Member]	Mar. 31, 2014 Pending Litigation [Member] Sunlight General Somerset [Member]	Mar. 31, 2014 Pending Litigation [Member] Sunlight General Morris [Member]	Mar. 31, 2014 Pending Litigation [Member] Sunlight General Sussex [Member]
Commitments and Contingencies [Line Items]
Pending litigation, number																		3	3
Contract price, pending litigation																				$ 29	$ 36	$ 26
Liens sought, pending litigation																		50
Letters of credit, outstanding amount	134.7	134.8											57.4	57.4
Outstanding bonds, amount									1,000.0	1,100.0					10.9	10.9
Estimated cost to complete bonded projects											281.6	297.1
Self insurance reserve					50.9	50.8	1.9	2.1
Self insurance reserve, non-current					32.0	31.3
Cash collateral held by insurance carriers			$ 1.4	$ 1.4
Other guarantees, description																	In the ordinary course of its business, from time to time, MasTec guarantees the obligations of its subsidiaries, including obligations under certain contracts with customers, certain lease obligations and in some states, obligations in connection with obtaining contractors’ licenses.
General warranty, description	MasTec also generally warrants the work it performs for a one to two year period following substantial completion of a project.

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Earnings Per Share (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Line Items]
Computation of earnings per share, methodology	Basic earnings per share is computed by dividing earnings available to MasTec’s common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share is computed by dividing earnings by the number of fully diluted shares, which includes the effect of dilutive potential issuances of common shares as determined using earnings from continuing operations. The potential issuance of common shares upon the exercise, conversion or vesting of outstanding stock options and unvested restricted share awards, as calculated under the treasury stock method, as well as shares associated with the Company’s outstanding convertible debt securities, may be dilutive.
Anti-dilutive common stock equivalents, shares	61,226	0
Convertible Debt [Member] | 2011 Convertible Notes [Member]
Earnings Per Share [Line Items]
Computation of earnings per share, methodology	Due to the optional cash settlement feature of the 2011 Convertible Notes and the Company's intent to settle the principal amount of such notes in cash, the conversion shares underlying the outstanding principal amount of the 2011 Convertible Notes, totaling approximately 13.0 million shares, are not required to be included in the Company's diluted share count. If, however, the average price per share of the Company's common stock exceeds the respective conversion prices of the 2011 Convertible Notes, then the resulting premium is translated into shares, referred to as “premium shares,” the number of which is required to be included in the Company's diluted share count. The number of premium shares included in our diluted share count varies with fluctuations in our share price. Higher share prices result in a greater number of premium shares. The Company’s weighted average share price for the three month periods ended March 31, 2014 and 2013 exceeded the conversion prices of the 2011 Convertible Notes, and as a result, dilutive premium shares have been included in the Company's share count for the corresponding periods.
Number of conversion shares, principal amount	13,000,000
Convertible Debt [Member] | 2009 Convertible Notes [Member]
Earnings Per Share [Line Items]
Computation of earnings per share, methodology	Dilutive shares associated with the 2009 Convertible Notes are attributable to the underlying principal amounts. The number of common shares issuable upon conversion of the Company’s 2009 Convertible Notes is reflected in the calculation of weighted average diluted earnings per share for the corresponding periods by application of the “if-converted” method to the extent its effect on the computation of earnings per share from continuing operations is dilutive. Under the “if-converted” method, net income from continuing operations is adjusted to add back the after-tax amount of interest recognized for the period associated with the convertible notes, and correspondingly, the convertible notes are assumed to have been converted with the resulting common shares added to the number of weighted average shares outstanding.
Convertible Debt [Member] | 2011 4.0% Notes [Member]
Earnings Per Share [Line Items]
Number of conversion shares, principal amount	6,683,000	6,683,000
Convertible Debt [Member] | 2011 4.25% Notes [Member]
Earnings Per Share [Line Items]
Number of conversion shares, principal amount	6,268,000	6,268,000
Unsecured Debt [Member] | Convertible Debt [Member] | Total Convertible Debt [Member]
Earnings Per Share [Line Items]
Principal amount	$ 215.0
Unsecured Debt [Member] | Convertible Debt [Member] | 2011 Convertible Notes [Member]
Earnings Per Share [Line Items]
Principal amount	202.3
Unsecured Debt [Member] | Convertible Debt [Member] | 2009 Convertible Notes [Member]
Earnings Per Share [Line Items]
Principal amount	12.6
Unsecured Debt [Member] | Convertible Debt [Member] | 2011 4.0% Notes [Member]
Earnings Per Share [Line Items]
Principal amount	105.3
Debt instrument, interest rate	4.00%
Conversion price per share	$ 15.76
Unsecured Debt [Member] | Convertible Debt [Member] | 2011 4.25% Notes [Member]
Earnings Per Share [Line Items]
Principal amount	$ 97.0
Debt instrument, interest rate	4.25%
Conversion price per share	$ 15.48

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Fair Value Of Financial Instruments (Narrative) (Details) (USD $)		3 Months Ended			12 Months Ended	3 Months Ended
	Mar. 31, 2014 Senior Notes [Member] Unsecured Debt [Member] 4.875% Senior Notes [Member]	Mar. 31, 2014 Earn-out Arrangements [Member]	Mar. 31, 2013 Earn-out Arrangements [Member]	Mar. 31, 2014 Earn-out Arrangements [Member] Foreign Currency Translation Adjustments [Member]	Dec. 31, 2013 Earn-out Arrangements [Member] Foreign Currency Translation Adjustments [Member]	Mar. 31, 2014 Level 1 [Member] Senior Notes [Member] Unsecured Debt [Member] Total Senior And Senior Convertible Notes [Member]	Mar. 31, 2014 Level 1 [Member] Cash Surrender Value [Member]	Mar. 31, 2014 Level 3 [Member] Earn-out Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Non-Recurring Basis [Line Items]
Fair value measurements, valuation techniques						The estimated fair values of the Company’s 4.875% Senior Notes, 2009 Convertible Notes and 2011 Convertible Notes are based on quoted market prices, a Level 1 input.	Cash surrender values of life insurance policies are based on current cash surrender values as quoted by insurance carriers.	The fair value of such acquisition-related contingent consideration is based on management’s estimates and entity-specific assumptions and is evaluated on an on-going basis.
Debt instrument, interest rate	4.875%
Additions from new business combinations, acquisition-related contingent consideration		$ 8,700,000	$ 0
Payments of acquisition-related contingent consideration		0	600,000
Foreign currency translation adjustments included in other comprehensive income, acquisition-related contingent consideration				$ 1,400,000	$ 400,000

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Other Retirement Plans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2014
Multiemployer Plans [Abstract]
Multi-employer plans, general nature	Certain of MasTec’s subsidiaries contribute amounts to multi-employer pension and other multi-employer benefit plans and trusts. Contributions are generally based on fixed amounts per hour per employee for employees covered under these plans. Multi-employer plan contribution rates are determined annually and assessed on a “pay-as-you-go” basis based on union employee payrolls. Union payrolls cannot be determined for future periods because the number of union employees employed at any given time, and the plans in which they may participate, vary depending upon the location and number of ongoing projects at a given time and the need for union resources in connection with those projects.

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Condensed Unaudited Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Income Statement [Abstract]
Revenue	$ 964,029		$ 918,648
Costs of revenue, excluding depreciation and amortization	841,054		791,499
Depreciation and amortization	33,494		31,753
General and administrative expenses	53,327		48,885
Interest expense, net	12,003		10,045
Loss on extinguishment of debt	0		5,624
Other income, net	(1,955)		(826)
Income from continuing operations before income taxes	26,106		31,668
Provision for income taxes	(9,916)		(12,348)
Net income from continuing operations	16,190		19,320
Discontinued operations:
Net loss from discontinued operations (See Note 4)	(122)		(947)
Net income	16,068		18,373
Net income attributable to non-controlling interests	45		3
Net income attributable to MasTec, Inc.	$ 16,023		$ 18,370
Basic earnings (loss) per share:
Continuing operations	$ 0.21		$ 0.25
Discontinued operations	$ 0.00		$ (0.01)
Total basic earnings per share	$ 0.21	[1]	$ 0.24	[1]
Basic weighted average common shares outstanding	77,345		76,608
Diluted earnings (loss) per share:
Continuing operations	$ 0.19		$ 0.23
Discontinued operations	$ 0.00		$ (0.01)
Total diluted earnings per share	$ 0.19	[1]	$ 0.22	[1]
Diluted weighted average common shares outstanding	86,622		84,094

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

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Acquisitions (Schedule of Business Acquisition Pro Forma Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Business Acquisition, Pro Forma Information [Abstract]
Business acquisitions, pro forma information, description	The unaudited supplemental pro forma financial information presented below has been prepared by adjusting the historical results of MasTec to include the historical results of the acquired businesses described above. The unaudited supplemental pro forma combined historical results were then adjusted (i) to remove one-time acquisition costs; (ii) to increase amortization expense resulting from the incremental intangible assets acquired in such acquisitions; (iii) to increase interest expense as a result of the cash consideration paid; and (iv) to reduce interest expense from the repayment of acquired debt. The unaudited supplemental pro forma financial information does not include any adjustments to reflect the impact of cost savings or other synergies that may result from these acquisitions. As noted above, the unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented or that may be achieved by the combined companies in the future.
Business acquisitions, pro forma revenue	$ 964.0	$ 1,029.1
Business acquisitions, pro forma net income from continuing operations	16.2	24.1
Aquiree revenue, year over year incremental impact	119.8	43.1
Acquiree net income from continuing operations, year over year incremental impact	$ 1.0	$ 1.8

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Condensed Unaudited Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 16,068		$ 18,373
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	33,494		31,753
Non-cash interest expense, including write-off of deferred financing costs on redeemed debt	2,362		3,747
Non-cash stock-based compensation expense	3,260		2,357
Excess tax benefit from stock-based compensation	(3,246)	[1]	(903)	[1]
Provision for deferred income taxes	3,281		(3,626)
(Gains) losses on sales of assets	(1,622)		(683)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(43,440)		(28,497)
Inventories	(13,313)		12,167
Other assets, current and non-current portion	9,034		6,978
Accounts payable and accrued expenses	(14,683)		(4,844)
Billings in excess of costs and earnings	(12,247)		(19,596)
Book overdrafts	1,266		(5,970)
Other liabilities, current and non-current portion	(1,339)		11,542
Net cash (used in) provided by operating activities	(20,394)		26,130
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	(23,831)		(4,653)
Capital expenditures	(35,554)		(25,851)
Proceeds from sale of property and equipment	3,373		3,411
Payments for other investments	(1,098)		0
Net cash used in investing activities	(57,110)		(27,093)
Cash flows provided by (used in) financing activities:
Proceeds from credit facility	233,872		231,600
Repayments of credit facility	(157,349)		(365,600)
Proceeds from issuance of senior notes	0		400,000
Repayment of senior notes	0		(150,000)
Repayments of other borrowings	(2,830)		(11,429)
Payments of capital lease obligations	(10,956)		(7,692)
Excess tax benefit from stock-based compensation	3,246		903
Payments of financing costs, including call premiums on extinguishment of debt	(218)		(10,968)
Net cash provided by financing activities	64,314		84,365
Net (decrease) increase in cash and cash equivalents	(13,190)		83,402
Net effect of currency translation on cash	(476)		(60)
Cash and cash equivalents - beginning of period	22,927		26,767
Cash and cash equivalents - end of period	9,261		110,109
Cash and cash equivalents of discontinued operations	0		862
Cash and cash equivalents of continuing operations	9,261		109,247
Supplemental cash flow information:
Interest paid	12,430		10,720
Income taxes paid, net of refunds	11,928		8,245
Supplemental disclosure of non-cash information:
Equipment acquired under capital lease	8,240		23,002
Equipment [Member]
Supplemental disclosure of non-cash information:
Equipment acquired under financing arrangements	5,780		14,569
Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Payments of acquisition-related contingent consideration	0		(5,003)
Supplemental disclosure of non-cash information:
Value of acquisition-related contingent consideration	8,700		0
Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Payments of tax withholdings and proceeds from stock-based awards, net	(1,451)		2,554
Payments of acquisition-related contingent consideration	1,800		3,500
Operating Expense [Member]
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for losses on operating assets	623		3,584
Contracts Accounted for under Percentage of Completion [Member]
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for losses on construction projects, net	$ 108		$ (252)

[1] Excess tax benefits, which represent cash flows from tax deductions in excess of the recorded tax effect of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

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Debt (Schedule of Long Term Debt Instruments) (Parenthetical) (Details)	Mar. 31, 2014
Senior Notes [Member] | 4.875% Senior Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.875%
Convertible Debt [Member] | 2011 4.0% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%
Convertible Debt [Member] | 2011 4.25% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.25%
Convertible Debt [Member] | 2009 4.0% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%
Convertible Debt [Member] | 2009 4.25% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.25%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Debt instrument, weighted average interest rate	2.90%
Notes Payable [Member] | Equipment [Member]
Debt Instrument [Line Items]
Debt instrument, weighted average interest rate	3.00%

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Other Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2014

Multiemployer Plans [Abstract]

Schedule of Multi-Employer Plan Contribution Details

Total contributions to multi-employer plans, and the related number of employees covered by these plans, for the periods indicated ranged as follows:

	Multi-Employer Plans
	Covered Employees		Contributions (in millions)
For the Three Months Ended March 31,	Low	High	Pension		Post-Retirement Benefit		Total
2014	1,098	1,308	$	7.8	$	0.5	$	8.3
2013	778	1,149	$	8.3	$	0.8	$	9.1

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Lease Obligations (Capital Lease Obligations) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Leases [Abstract]
Assets held under capital lease, gross	$ 207.8	$ 199.6
Assets held under capital lease, net	$ 144.1	$ 141.3

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

In addition to the matters discussed below, MasTec is subject to a variety of legal cases, claims and other disputes that arise from time to time in the ordinary course of its business. MasTec cannot provide assurance that it will be successful in recovering all or any of the potential damages it has claimed or in defending claims against it. The outcome of such cases, claims and disputes (including the one set forth below) cannot be predicted with certainty and an unfavorable resolution of one or more of them could have a material adverse effect on the Company's business, financial condition, results of operations, cash flows and the trading price of its common stock.

SunLight Entities. In 2011, Power Partners MasTec, LLC., a MasTec, Inc. subsidiary (“Power Partners”), entered into engineering, procurement, and construction agreements with special purpose entities, SunLight General Somerset Solar, LLC, SunLight General Morris Solar, LLC and SunLight General Sussex Solar, LLC (collectively, the “SunLight Entities”), respectively, to perform design and construction services for three public solar projects in New Jersey located in Somerset, Morris and Sussex Counties (the “Projects”). The initial contract price of each of the Projects was, subject to adjustment, approximately as follows: Somerset ($29 million); Morris ($36 million); and Sussex ($26 million). The Projects were funded on a project finance basis, including the proceeds of municipal bonds issued by the Morris County and Somerset Improvement Authorities (collectively, the “Authorities”).

Power Partners and the SunLight Entities commenced three separate arbitration proceedings against each other to address various disputes that presently exist between the parties on the three Projects. The parties allege, among other things, breach of contract against each other. The arbitrations began in January 2014 and an award is anticipated in the summer of 2014. Power Partners believes it has presented meritorious support of its claims against Sunlight and, additionally, believes that it has meritorious defenses against Sunlight’s claims. Power Partners is vigorously pursuing its claims against Sunlight and vigorously defending against Sunlight’s claims.

Power Partners filed municipal liens and construction liens of approximately $50 million for the work performed but the liens were challenged by the SunLight Entities and the Authorities. On March 24, 2014, the New Jersey appellate court found that Power Partners did not have municipal or construction liens on the proceeds of the municipal bonds. The New Jersey Supreme Court denied Power Partner’s emergency motion to stay the adverse ruling. The Company is currently petitioning the New Jersey Supreme Court to review the New Jersey appellate court’s adverse ruling.

Power Partners also filed a federal lawsuit in the United States District Court of New Jersey against the Authorities and the principals of the SunLight Entities in June 2013. The claims against the Authorities include violations of the New Jersey Public Works Bond Act and the New Jersey Construction Trust Fund Act, tortious interference and unjust enrichment and quantum meruit. The Authorities and the SunLight principals have filed motions to dismiss. Power Partners has filed a response to the motions to dismiss. The litigation is in the early stages.

Other Commitments and Contingencies

Leases. In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facility, vehicle and equipment needs, including related party leases. See Note 10 - Lease Obligations.

Letters of Credit. In the ordinary course of business, the Company is required to post letters of credit for its insurance carriers, surety bond providers and in support of performance under certain contracts. Such letters of credit are generally issued by a bank or similar financial institution. The letter of credit commits the issuer to pay specified amounts to the holder of the letter of credit under certain conditions. If this were to occur, the Company would be required to reimburse the issuer of the letter of credit, which, depending upon the circumstances, could result in a charge to earnings. As of March 31, 2014 and December 31, 2013, the Company had $134.7 million and $134.8 million, respectively, of letters of credit issued under its 2013 Credit Facility. The Company was not aware of any material claims relating to outstanding letters of credit as of March 31, 2014 or December 31, 2013.

Performance and Payment Bonds. In the ordinary course of business, MasTec is required by certain customers to provide performance and payment bonds for some of the Company’s contractual commitments related to projects in process. These bonds provide a guarantee to the customer that the Company will perform under the terms of a contract and that the Company will pay subcontractors and vendors. If the Company fails to perform under a contract or to pay subcontractors and vendors, the customer may demand that the surety make payments or provide services under the bond. The Company must reimburse the surety for any expenses or outlays it incurs. As of March 31, 2014, the estimated cost to complete projects secured by the Company’s $1.0 billion in performance and payment bonds was $281.6 million. As of December 31, 2013, the estimated cost to complete projects secured by the Company’s $1.1 billion in performance and payment bonds was $297.1 million.

Self-Insurance. MasTec maintains insurance policies for workers’ compensation, general liability and automobile liability, which are subject to per claim deductibles. The Company also maintains excess umbrella coverage. As of March 31, 2014 and December 31, 2013, MasTec’s liability for unpaid claims and associated expenses, including incurred but not reported losses related to its workers compensation, general liability and automobile liability insurance policies, was $50.9 million and $50.8 million, respectively, of which $32.0 million and $31.3 million, respectively, was reflected within non-current other liabilities in the condensed unaudited consolidated balance sheets. MasTec also maintains an insurance policy with respect to employee group medical claims, which is subject to annual per employee maximum losses. MasTec’s liability for employee group medical claims as of March 31, 2014 and December 31, 2013 was $1.9 million and $2.1 million, respectively.

The Company is required to post letters of credit and provide cash collateral to certain of its insurance carriers and to provide surety bonds in certain states. These letters of credit amounted to $57.4 million as of both March 31, 2014 and December 31, 2013. In addition, cash collateral deposited with insurance carriers, which is included in other long-term assets in the condensed unaudited consolidated balance sheets, amounted to $1.4 million as of both March 31, 2014 and December 31, 2013. Outstanding surety bonds related to workers’ compensation self-insurance programs amounted to $10.9 million as of both March 31, 2014 and December 31, 2013.

Employment Agreements. The Company has employment agreements with certain executives and other employees, which provide for compensation and certain other benefits and for severance payments under certain circumstances. Certain employment agreements also contain clauses that become effective upon a change of control of the Company. Upon the occurrence of any of the defined events in the various employment agreements, the Company would be obligated to pay certain amounts to the relevant employees, which vary with the level of the employees’ respective responsibility.

Collective Bargaining Agreements and Multi-Employer Plans.Certain of MasTec’s subsidiaries are party to various collective bargaining agreements with unions representing certain of their employees. The agreements require the subsidiaries party to the agreements to pay specified wages, provide certain benefits to their union employees and contribute certain amounts to multi-employer pension plans and employee benefit trusts. The collective bargaining agreements expire at various times and have typically been renegotiated and renewed on terms similar to the ones contained in the expiring agreements.

The Employee Retirement Income Security Act of 1974, as amended by the Multi-Employer Pension Plan Amendments Act of 1980 (collectively, “ERISA”), subjects employers to substantial liabilities in the event of the employer’s complete or partial withdrawal from, or upon termination of, such plans. Under current law regarding employers who are contributors to multi-employer defined benefit plans, a plan’s termination, an employer’s voluntary withdrawal from, or the mass withdrawal of all contributing employers from, an underfunded multi-employer defined benefit plan requires participating employers to make payments to the plan for their proportionate share of the multi-employer plan’s unfunded vested liabilities. Furthermore, the Pension Protection Act of 2006 added new funding rules generally applicable to plan years beginning after 2007 for multi-employer plans that are classified as “endangered,” “seriously endangered,” or “critical” status. If plans in which the Company’s subsidiaries participate are in critical status, benefit reductions may apply and/or the Company could be required to make additional contributions if the plans are determined to be underfunded. Based upon the information available to the Company from plan administrators as of March 31, 2014, several of the multi-employer pension plans in which the Company’s subsidiaries participate are underfunded and the Company could be required to increase its contributions to such plans.

On November 15, 2011, the Company, along with other members of the Pipe Line Contractors Association (“PLCA”), voluntarily withdrew from the Central States Southeast and Southwest Areas Pension Fund (“Central States”), a defined benefit multi-employer pension plan that is in critical status. In connection with this withdrawal, a $6.4 million withdrawal liability was established based on an estimate provided by the Central States administrator of such liability as of the date of withdrawal. The Company began paying installments towards this withdrawal liability in 2013, of which $5.1 million was outstanding as of March 31, 2014. The Company withdrew from Central States in order to mitigate its liability in connection with the plan; however, Central States has asserted that the PLCA members did not effectively withdraw in 2011 and are, therefore, responsible for a withdrawal liability that includes 2011 contribution amounts. By letter dated March 14, 2013, Central States demanded $11 million in withdrawal liability from the Company, which included 2011 contribution amounts. The Company is vigorously opposing this demand because it believes that it legally and effectively withdrew from Central States on November 15, 2011. If Central States were to prevail in its assertion that the Company withdrew after that date, then the initial amount of the Company’s withdrawal liability would increase to approximately $11 million. In addition, if Central States were to undergo a mass withdrawal, as defined by ERISA and the Pension Benefit Guaranty Corporation, within the three year period commencing with the beginning of the calendar year during which the Company withdrew from the plan, there could be additional liability. The Company currently does not have plans to withdraw from any other multi-employer pension plan.

Indemnities. The Company generally indemnifies its customers for the services it provides under its contracts, as well as other specified liabilities, which may subject the Company to indemnity claims, liabilities and related litigation. As of March 31, 2014 and December 31, 2013, the Company was not aware of any material asserted or unasserted claims in connection with these indemnity obligations.

Other Guarantees.In the ordinary course of its business, from time to time, MasTec guarantees the obligations of its subsidiaries, including obligations under certain contracts with customers, certain lease obligations and in some states, obligations in connection with obtaining contractors’ licenses.MasTec also generally warrants the work it performs for a one to two year period following substantial completion of a project. MasTec has not historically accrued any reserves for potential warranty claims as they have been immaterial.

Concentrations of Risk. The Company had approximately 290 customers as of March 31, 2014. For the three months ended March 31, 2014 and 2013, the Company derived 73% and 69%, respectively, of revenues from its top ten customers. See Note 15 - Segments and Related Information for significant customer revenue concentration information.

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Equity (Tables)

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Schedule of Share Activity

The following is a summary of share activity for the period indicated:

Share Activity (in thousands):	Common Shares Outstanding		Treasury Shares
Balance as of December 31, 2013	77,258		9,467
Shares issued for stock option exercises	201
Shares issued for restricted stock awards	141
Other shares issued, net of shares withheld for taxes	(73	)
Balance as of March 31, 2014	77,527		9,467

Schedule of Changes in Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss by component during the periods indicated are as follows (in thousands):

	For the Three Months Ended March 31,
	2014									2013
	Unrealized (Losses) Gains
	Foreign Currency			Available-for-Sale Securities			Total			Foreign Currency			Available-for-Sale Securities			Total
Balance as of January 1	$	(7,998	)	$	(5,288	)	$	(13,286	)	$	(105	)	$	(5,396	)	$	(5,501	)
Activity before reclassifications, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Reclassifications, net of tax	—			—			—			—			—			—
Activity, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Balance as of March 31	$	(13,333	)	$	(5,288	)	$	(18,621	)	$	(929	)	$	(5,175	)	$	(6,104	)

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information

3 Months Ended

Mar. 31, 2014

Condensed Unaudited Financial Statements, Supplemental Guarantor Information [Abstract]

Supplemental Guarantor Condensed Unaudited Consolidating Financial Information

Supplemental Guarantor Condensed Unaudited Consolidating Financial Information

The 2011 Convertible Notes, 2009 Convertible Notes and 4.875% Senior Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are each guarantors of the Company's 2013 Credit Facility or other outstanding indebtedness (the “Guarantor Subsidiaries”).  Certain subsidiaries included in the Company's Guarantor Subsidiaries, which are minor individually and in the aggregate, do not guarantee the 4.875% Senior Notes. The Company's subsidiaries organized outside of the United States and certain domestic subsidiaries (collectively, the “Non-Guarantor Subsidiaries”) do not guarantee any of these notes. A Guarantor Subsidiary's guaranty is subject to release in certain customary circumstances, including upon the sale of a majority of the capital stock or substantially all of the assets of such Subsidiary Guarantor, if such Subsidiary Guarantor's guarantee under our 2013 Credit Facility and other indebtedness is released or discharged (other than due to payment under such guarantee), or when the requirements for legal defeasance are satisfied or the obligations are discharged in accordance with the related indentures.

The following supplemental financial information sets forth the condensed unaudited consolidating balance sheets and the condensed unaudited consolidating statements of operations and comprehensive income and cash flows for the parent company (MasTec, Inc.), the Guarantor Subsidiaries on a combined basis, the Non-Guarantor Subsidiaries on a combined basis and the eliminations necessary to arrive at the information for the Company as reported on a consolidated basis. Eliminations represent adjustments to eliminate investments in subsidiaries and intercompany balances and transactions between or among MasTec, Inc., the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries.  Investments in subsidiaries are accounted for using the equity method for this presentation.

.

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	793.1		$	170.9		$	—		$	964.0
Costs of revenue, excluding depreciation and amortization	—			689.8			151.3			—			841.1
Depreciation and amortization	—			27.4			6.1			—			33.5
General and administrative expenses	0.6			47.3			5.4			—			53.3
Interest expense, net	—			11.7			0.3			—			12.0
Other (income) expense, net	—			(2.1		)	0.1			—			(2.0		)
(Loss) income from continuing operations before income taxes	$	(0.6	)	$	19.0		$	7.7		$	—		$	26.1
Benefit from (provision for) income taxes	0.2			(9.4		)	(0.7		)	—			(9.9		)
Net (loss) income from continuing operations	$	(0.4	)	$	9.6		$	7.0		$	—		$	16.2
Net loss from discontinued operations	—			—			(0.1		)	—			(0.1		)
Equity in income from subsidiaries, net of tax	16.4			—			—			(16.4		)	—
Net income (loss)	$	16.0		$	9.6		$	6.9		$	(16.4	)	$	16.1
Net income attributable to non-controlling interests	—			—			0.1			—			0.1
Net income (loss) attributable to MasTec, Inc.	$	16.0		$	9.6		$	6.8		$	(16.4	)	$	16.0
Comprehensive income (loss)	$	10.6		$	9.5		$	1.6		$	(11.0	)	$	10.7

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	843.1		$	77.2		$	(1.7	)	$	918.6
Costs of revenue, excluding depreciation and amortization	—			721.2			72.0			(1.7		)	791.5
Depreciation and amortization	—			28.9			2.9			—			31.8
General and administrative expenses	0.3			45.1			3.5			—			48.9
Interest expense, net	—			10.0			—			—			10.0
Loss on extinguishment of debt	—			5.6			—			—			5.6
Other income, net	—			(0.9		)	—			—			(0.9		)
(Loss) income from continuing operations before income taxes	$	(0.3	)	$	33.2		$	(1.2	)	$	—		$	31.7
Benefit from (provision for) income taxes	0.1			(13.0		)	0.5			—			(12.4		)
Net (loss) income from continuing operations	$	(0.2	)	$	20.2		$	(0.7	)	$	—		$	19.3
Net loss from discontinued operations	—			—			(0.9		)	—			(0.9		)
Equity in income from subsidiaries, net of tax	18.8			—			—			(18.8		)	—
Net income (loss)	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Net income attributable to non-controlling interests	—			—			0.0			—			0.0
Net income (loss) attributable to MasTec, Inc.	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Comprehensive income (loss)	$	17.8		$	20.5		$	(2.5	)	$	(18.0	)	$	17.8

CONDENSED UNAUDITED CONSOLIDATING BALANCE SHEETS (in millions)

As of March 31, 2014	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,165.3	$	192.6		$	—		$	1,357.9
Property and equipment, net	—		435.9		73.7			—			509.6
Goodwill and other intangible assets, net	—		931.8		152.7			—			1,084.5
Net investments in and advances to (from) consolidated affiliates	1,022.5		173.9		(25.0		)	(1,171.4		)	—
Other long-term assets, including discontinued operations	9.3		36.9		15.2			—			61.4
Total assets	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4
Liabilities and Equity
Total current liabilities	$	—	$	735.7	$	84.7		$	—		$	820.4
Long-term debt	—		833.3		8.0			—			841.3
Other liabilities	—		236.7		78.2			—			314.9
Total liabilities	$	—	$	1,805.7	$	170.9		$	—		$	1,976.6
Total equity	$	1,031.8	$	938.1	$	238.3		$	(1,171.4	)	$	1,036.8
Total liabilities and equity	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4

As of December 31, 2013	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,155.9	$	150.3		$	—		$	1,306.2
Property and equipment, net	—		420.2		67.9			—			488.1
Goodwill and other intangible assets, net	—		933.9		132.2			—			1,066.1
Net investments in and advances to (from) consolidated affiliates	1,006.8		172.4		(24.1		)	(1,155.1		)	—
Other long-term assets, including discontinued operations	9.3		36.2		15.1			—			60.6
Total assets	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0
Liabilities and Equity
Total current liabilities	$	—	$	773.3	$	53.4		$	—		$	826.7
Long-term debt	—		760.9		4.5			—			765.4
Other liabilities	—		236.7		71.1			—			307.8
Total liabilities	$	—	$	1,770.9	$	129.0		$	—		$	1,899.9
Total equity	$	1,016.1	$	947.7	$	212.4		$	(1,155.1	)	$	1,021.1
Total liabilities and equity	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF CASH FLOWS (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.3	)	$	15.2		$	(35.3	)	$	—	$	(20.4	)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(23.8		)	—			—		(23.8		)
Capital expenditures	—			(32.6		)	(3.0		)	—		(35.6		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Payments for other investments	—			(1.1		)	—			—		(1.1		)
Net cash used in investing activities	$	—		$	(54.1	)	$	(3.0	)	$	—	$	(57.1	)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	—			76.5			—			—		76.5
Repayments of other borrowings and capital lease obligations	—			(12.9		)	(0.9		)	—		(13.8		)
Excess tax benefits and net proceeds from stock-based awards	1.1			0.7			—			—		1.8
Payments of financing costs	—			(0.2		)	—			—		(0.2		)
Net financing activities and advances (to) from consolidated affiliates	(0.8		)	(24.7		)	25.5			—		—
Net cash provided by financing activities	$	0.3		$	39.4		$	24.6		$	—	$	64.3
Net increase (decrease) in cash and cash equivalents	—			0.5			(13.7		)	—		(13.2		)
Net effect of currency translation on cash	—			—			(0.5		)	—		(0.5		)
Cash and cash equivalents - beginning of period	—			5.3			17.7			—		23.0
Cash and cash equivalents - end of period	$	—		$	5.8		$	3.5		$	—	$	9.3
Cash and cash equivalents of discontinued operations	$	—		$	—		$	—		$	—	$	—
Cash and cash equivalents of continuing operations	$	—		$	5.8		$	3.5		$	—	$	9.3

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.6	)	$	50.3		$	(23.6	)	$	—	$	26.1
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(4.7		)	—			—		(4.7		)
Capital expenditures	—			(25.4		)	(0.4		)	—		(25.8		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Net cash used in investing activities	$	—		$	(26.7	)	$	(0.4	)	$	—	$	(27.1	)
Cash flows provided by (used in) financing activities:
(Repayments of) proceeds from credit facility	$	—		$	(134.0	)	$	—		$	—	$	(134.0	)
Proceeds from senior notes, net	—			250.0			—			—		250.0
Repayments of other borrowings and capital lease obligations	—			(19.1		)	—			—		(19.1		)
Excess tax benefits and net proceeds from stock-based awards	2.8			0.7			—			—		3.5
Payments of acquisition-related contingent consideration	—			(5.0		)	—			—		(5.0		)
Payments of financing costs, including call premiums on extinguishment of debt	—			(11.0		)	—			—		(11.0		)
Net financing activities and advances (to) from consolidated affiliates	(2.2		)	(12.9		)	15.1			—		—
Net cash provided by financing activities	$	0.6		$	68.7		$	15.1		$	—	$	84.4
Net increase (decrease) in cash and cash equivalents	—			92.3			(8.9		)	—		83.4
Net effect of currency translation on cash	—			(0.1		)	—			—		(0.1		)
Cash and cash equivalents - beginning of period	—			12.7			14.1			—		26.8
Cash and cash equivalents - end of period	$	—		$	104.9		$	5.2		$	—	$	110.1
Cash and cash equivalents of discontinued operations	$	—		$	—		$	0.9		$	—	$	0.9
Cash and cash equivalents of continuing operations	$	—		$	104.9		$	4.3		$	—	$	109.2

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Stock-Based Compensation and Other Employee Benefit Plans (Summary of Restricted Share Awards) (Details) (Restricted Stock Plan [Member], USD $)	3 Months Ended
	Mar. 31, 2014
Restricted Stock Plan [Member]
Restricted Share Award Activity, Number of Shares [Roll Forward]
Non-vested restricted shares, beginning balance	1,123,545
Granted	326,442
Vested	(141,138)
Canceled/forfeited	(13,450)
Non-vested restricted shares, ending balance	1,295,399
Restricted Share Award Activity, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant date fair value, beginning balance	$ 23.78
Granted	$ 41.39
Vested	$ 19.41
Canceled/forfeited	$ 16.05
Weighted average grant date fair value, ending balance	$ 28.77

XML

Business, Basis of Presentation and Significant Accounting Policies

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Business, Basis of Presentation and Significant Accounting Policies

Business, Basis of Presentation and Significant Accounting Policies

Nature of the Business

MasTec, Inc. (collectively with its subsidiaries, “MasTec” or the “Company”) is a leading infrastructure construction company operating mainly throughout North America across a range of industries. The Company’s primary activities include the engineering, building, installation, maintenance and upgrade of energy, utility and communications infrastructure, such as: petroleum and natural gas pipeline infrastructure; wireless, wireline and satellite communications; electrical utility transmission and distribution; power generation; and industrial infrastructure. MasTec’s customers are in these industries. MasTec reports its results in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial; and (5) Other. See Note 15 - Segments and Related Information.

Basis of Presentation

The accompanying condensed unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The accompanying condensed consolidated balance sheet as of December 31, 2013 is derived from the Company’s audited financial statements as of that date. Because certain information and footnote disclosures have been condensed or omitted, these condensed unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2013 contained in the Company’s most recent Annual Report on Form 10-K. In management’s opinion, all normal and recurring adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented have been included. Certain prior year amounts have been reclassified to conform to the current period presentation. Interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. The Company believes that the disclosures made in these condensed unaudited consolidated financial statements are adequate to make the information not misleading.

Principles of Consolidation

The accompanying condensed unaudited consolidated financial statements include MasTec, Inc. and its subsidiaries and include the accounts of all majority owned subsidiaries over which the Company exercises control and, when applicable, entities in which the Company has a controlling financial interest. Other parties’ interests in companies for which MasTec exercises control and has a controlling financial interest are reported as non-controlling interests within equity. Net income or loss attributable to non-controlling interests is reported as a separate line item below net income. The Company’s investments in entities in which the Company does not have a controlling interest, but has the ability to exert significant influence, are accounted for using the equity method of accounting. Equity method investments are recorded as long-term assets in the condensed unaudited consolidated balance sheets. Income or loss from these investments is recorded in other income or expense, net, in the condensed unaudited consolidated statements of operations. The cost method is used for investments in entities in which the Company does not have the ability to exert significant influence. All significant intercompany balances and transactions have been eliminated in consolidation. The assets and liabilities of foreign subsidiaries are translated into U.S. dollars at period-end exchange rates, with resulting translation gains or losses accumulated within other comprehensive income or loss. Revenue and expenses are translated into U.S. dollars at average rates of exchange prevailing during the applicable period. Gains or losses resulting from transactions executed in a foreign currency are included in other income or expense, net. The Company does not currently have any subsidiaries that operate in highly inflationary environments. The results of operations and financial position of any discontinued operations are aggregated and presented separately from the Company's continuing operations in the condensed unaudited consolidated financial statements for all periods presented.

Management Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Key estimates include: the recognition of revenue, in particular, on long-term construction contracts, including estimates of costs to complete projects and provisions for contract losses; allowances for doubtful accounts; accrued self-insured claims; estimated fair values of goodwill and intangible assets, acquisition-related contingent consideration, assets and liabilities classified as held-for-sale, convertible debt obligations and investments in cost and equity method investees; asset lives used in computing depreciation and amortization, including amortization of intangible assets; share-based compensation; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that such estimates are fair when considered in conjunction with the consolidated financial position and results of operations taken as a whole, actual results could differ from those estimates and such differences may be material to the condensed unaudited consolidated financial statements.

Significant Accounting Policies

Revenue Recognition

Revenues are derived from projects performed under master and other service agreements as well as from fixed price contracts for specific projects or jobs requiring the construction and installation of an entire infrastructure system or specified units within an entire infrastructure system. Revenue and related costs for master and other service agreements billed on a time and materials basis are recognized as the services are rendered. The Company also performs services under master and other service agreements on a fixed fee basis, under which MasTec furnishes specified units of service for a fixed price per unit of service and revenue is recognized as the services are rendered. Revenues from fixed price contracts provide for a fixed amount of revenue for the entire project, subject to certain additions for changed scope or specifications. Revenues from these contracts are recognized using the percentage-of-completion method. Under this method, the percentage of revenue to be recognized for a given project is measured by the percentage of costs incurred to date on the contract to the total estimated costs for the contract. Such contracts provide that the customer accept completion of progress to date and compensate the Company for services rendered, which may be measured in terms of costs incurred, units installed, hours expended or some other measure of progress.

The Company may incur costs subject to change orders, whether approved or unapproved by the customer, and/or claims related to certain contracts. Management determines the probability that such costs will be recovered based upon evidence such as engineering studies and legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer. The Company treats project costs as a cost of contract performance in the period incurred if it is not probable that the costs will be recovered, or defers costs and/or recognizes revenue up to the amount of the related cost if it is probable that the contract price will be adjusted and can be reliably estimated. As of March 31, 2014 and December 31, 2013, the Company had approximately $163 million and $79 million, respectively, of change orders and/or claims that had been included as contract price adjustments on certain contracts that were in the process of being negotiated in the normal course of business, including arbitration and other proceedings. These contract price adjustments represent management's best estimate of additional contract revenues that have been earned and that management believes are probable of collection. The amounts ultimately realized upon final acceptance by its customers could be higher or lower than such estimated amounts, which are primarily expected to be billed and collected within one year. The $84 million increase in change orders and/or claims since December 31, 2013 is primarily due to a project in our Oil and Gas segment, which amounts have been approved in principle subsequent to March 31, 2014.

Except for adoption of the accounting pronouncement discussed below, there have been no material changes to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

New Accounting Pronouncements

Accounting Standards Not Yet Adopted

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”). ASU 2014-08 changes the requirements for reporting discontinued operations and requires additional disclosures about discontinued operations. Only disposals of components of an entity representing a strategic shift that has, or will have, a major effect on an entity’s operations and financial results should be reported as discontinued operations under ASU 2014-08. Examples include a disposal of a major geographical area, a major line of business, or a major equity method investment. ASU 2014-08 also requires expanded disclosures about discontinued operations and requires disclosures about individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. The Company is currently evaluating the potential impact of this ASU on its condensed unaudited consolidated financial statements.

Recently Adopted Accounting Pronouncements

In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force) (“ASU 2013-11”).  ASU 2013-11 provides guidance on the presentation in the financial statements of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, and explains that unrecognized tax benefits should be presented as a reduction to deferred tax assets for net operating loss carryforwards, similar tax losses or tax credit carryforwards. To the extent a net operating loss carryforward, similar tax loss or tax credit carryforward is not available as of the reporting date under the tax law of the applicable jurisdiction, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. ASU 2013-11 applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, similar tax loss, or tax credit carryforward exists as of the reporting date. ASU 2013-11 is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Retrospective application is permitted. The Company adopted ASU 2013-11 as of January 1, 2014. The adoption of this ASU did not have a material impact on the condensed unaudited consolidated financial statements.

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Condensed Unaudited Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 16,068	$ 18,373
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	(5,335)	(603)
Comprehensive income	10,733	17,770
Comprehensive income attributable to non-controlling interests	45	3
Comprehensive income attributable to MasTec, Inc.	10,688	17,767
Foreign Currency [Member]
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	(5,335)	(824)
Available-for-Sale-Securities [Member]
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	$ 0	$ 221

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Stock-Based Compensation and Other Employee Benefit Plans

3 Months Ended

Mar. 31, 2014

Share-based Compensation [Abstract]

Stock-Based Compensation and Other Employee Benefit Plans

Stock-Based Compensation and Other Employee Benefit Plans

The Company has certain stock-based compensation plans, under which stock options and restricted share awards are available for issuance or outstanding. Under stock-based compensation plans in effect as of March 31, 2014, there were a total of 6,243,047 shares available for grant or issuance.

Restricted Share Awards

MasTec grants restricted share awards, which are valued based on the market price of MasTec common stock on the date of grant. Total unearned compensation related to restrictedshare awards as ofMarch 31, 2014was approximately$24.3 million, which is expected to be recognized over a weighted average period of approximately1.6years. The total intrinsic value, or fair value, of restricted share awards that vested, which is based on the market price on the date of vesting, was $5.9 million and $0.7 million for the three month periods ended March 31, 2014 and 2013.

Activity, restricted share awards:	Restricted Shares		Weighted Average Grant Date Fair Value
Non-vested restricted shares, as of December 31, 2013	1,123,545		$	23.78
Granted	326,442		41.39
Vested	(141,138	)	19.41
Canceled/forfeited	(13,450	)	16.05
Non-vested restricted shares, as of March 31, 2014	1,295,399		$	28.77

Stock Options

The Company has granted options to purchase its common stock to employees and members of the Board of Directors and affiliates under various stock option plans at not less than the fair market value of the underlying stock on the date of grant. All outstanding stock options are fully vested.

Activity, stock options:	StockOptions		Per Share Weighted AverageExercise Price		Weighted Average Remaining Contractual Life(in years)	Aggregate Intrinsic Value (a)(in millions)
Options outstanding as of December 31, 2013	495,571		$	11.17	1.96	$	10.7
Exercised	(200,900	)	9.77
Canceled/forfeited	—		—
Options outstanding as of March 31, 2014	294,671		$	12.13	2.04	$	9.2
Options exercisable as of March 31, 2014	294,671		$	12.13	2.04	$	9.2

(a) Amount represents the difference between the exercise price and the market price of the Company’s stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.

The total intrinsic value of options exercised during the three month periods ended March 31, 2014 and 2013, which is based on the difference between the exercise price and the market price of the Company’s stock at the date of exercise, was $6.3 million and $3.5 million, respectively. Proceeds from options exercised during the three month periods ended March 31, 2014 and 2013 totaled $0.6 million and $1.9 million, respectively.

Employee Stock Purchase Plans

The Company's employee stock purchase plans allow qualified employees to purchase MasTec, Inc. common stock at 85% of the fair market value of the common stock at the lower of (i) the date of commencement of the offering period or (ii) the last day of the exercise period, as defined in the plan documents.The fair value of purchases under the Company's employee stock purchase plans is estimated using the Black-Scholes option-pricing valuation model.

	Three Months Ended March 31,
Activity, employee stock purchase plan:	2014		2013
Cash proceeds (in millions)	$	0.8	$	0.9
Common shares issued	26,968		67,556
Weighted average price per share	$	27.81	$	13.19
Weighted average grant date fair value per share	$	6.59	$	5.00

Stock-Based Compensation Expense and Tax Benefits

Details of stock based compensation expense, which is included within general and administrative expense in the condensed unaudited consolidated statement of operations, and related tax benefits for the periods indicated are as follows (in millions):

	Three Months Ended March 31,
	2014		2013
Stock-based compensation expense	$	3.3	$	2.4
Income Tax Effects:
Income tax benefit from stock-based compensation	$	4.5	$	1.5
Excess tax benefit from stock-based compensation (a)	$	3.2	$	0.9

(a) Excess tax benefits, which represent cash flows from tax deductions in excess of the recorded tax effect of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 28, 2014
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Entity Registrant Name	MASTEC INC
Trading Symbol	MTZ
Entity Central Index Key	0000015615
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		77,556,250

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Other Retirement Plans

3 Months Ended

Mar. 31, 2014

Multiemployer Plans [Abstract]

Other Retirement Plans

Other Retirement Plans

Multi-Employer Plans. Certain of MasTec’s subsidiaries contribute amounts to multi-employer pension and other multi-employer benefit plans and trusts. Contributions are generally based on fixed amounts per hour per employee for employees covered under these plans. Multi-employer plan contribution rates are determined annually and assessed on a “pay-as-you-go” basis based on union employee payrolls. Union payrolls cannot be determined for future periods because the number of union employees employed at any given time, and the plans in which they may participate, vary depending upon the location and number of ongoing projects at a given time and the need for union resources in connection with those projects. Total contributions to multi-employer plans, and the related number of employees covered by these plans, for the periods indicated ranged as follows:

	Multi-Employer Plans
	Covered Employees		Contributions (in millions)
For the Three Months Ended March 31,	Low	High	Pension		Post-Retirement Benefit		Total
2014	1,098	1,308	$	7.8	$	0.5	$	8.3
2013	778	1,149	$	8.3	$	0.8	$	9.1

XML

Segments and Related Information (Schedule of Segment Reporting Information, by Segment - Depreciation and Amortization) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 33,494	$ 31,753
Operating Segments [Member] | Communications [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	9,900	8,200
Operating Segments [Member] | Oil and Gas [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	18,100	18,700
Operating Segments [Member] | Electrical Transmission [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2,800	2,300
Operating Segments [Member] | Power Generation and Industrial [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	1,500	1,700
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 1,200	$ 900

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information (Condensed Unaudited Consolidating Statements Of Cash Flows) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Unaudited Consolidating Statements of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	$ (20,394,000)	$ 26,130,000
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	(23,831,000)	(4,653,000)
Capital expenditures	(35,554,000)	(25,851,000)
Proceeds from sale of property and equipment	3,373,000	3,411,000
Payments for other investments	(1,098,000)	0
Net cash used in investing activities	(57,110,000)	(27,093,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	76,500,000	(134,000,000)
Proceeds from senior notes, net		250,000,000
Repayments of other borrowings and capital lease obligations	(13,800,000)	(19,100,000)
Payments of financing costs, including call premiums on extinguishment of debt	(218,000)	(10,968,000)
Net financing activities and advances (to) from consolidated affiliates	0	0
Net cash provided by financing activities	64,314,000	84,365,000
Net (decrease) increase in cash and cash equivalents	(13,190,000)	83,402,000
Net effect of currency translation on cash	(476,000)	(60,000)
Cash and cash equivalents - beginning of period	22,927,000	26,767,000
Cash and cash equivalents - end of period	9,261,000	110,109,000
Cash and cash equivalents of discontinued operations	0	862,000
Cash and cash equivalents of continuing operations	9,261,000	109,247,000
Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	(5,003,000)
Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	1,800,000	3,500,000
Eliminations [Member]
Condensed Unaudited Consolidating Statements of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	0	0
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	0	0
Capital expenditures	0	0
Proceeds from sale of property and equipment	0	0
Payments for other investments	0
Net cash used in investing activities	0	0
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	0	0
Proceeds from senior notes, net		0
Repayments of other borrowings and capital lease obligations	0	0
Payments of financing costs, including call premiums on extinguishment of debt	0	0
Net financing activities and advances (to) from consolidated affiliates	0	0
Net cash provided by financing activities	0	0
Net (decrease) increase in cash and cash equivalents	0	0
Net effect of currency translation on cash	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Cash and cash equivalents of discontinued operations	0	0
Cash and cash equivalents of continuing operations	0	0
Eliminations [Member] | Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities		0
Eliminations [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	0
MasTec, Inc. [Member]
Condensed Unaudited Consolidating Statements of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	(300,000)	(600,000)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	0	0
Capital expenditures	0	0
Proceeds from sale of property and equipment	0	0
Payments for other investments	0
Net cash used in investing activities	0	0
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	0	0
Proceeds from senior notes, net		0
Repayments of other borrowings and capital lease obligations	0	0
Payments of financing costs, including call premiums on extinguishment of debt	0	0
Net financing activities and advances (to) from consolidated affiliates	(800,000)	(2,200,000)
Net cash provided by financing activities	300,000	600,000
Net (decrease) increase in cash and cash equivalents	0	0
Net effect of currency translation on cash	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Cash and cash equivalents of discontinued operations	0	0
Cash and cash equivalents of continuing operations	0	0
MasTec, Inc. [Member] | Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities		0
MasTec, Inc. [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	1,100,000	2,800,000
Guarantor Subsidiaries [Member]
Condensed Unaudited Consolidating Statements of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	15,200,000	50,300,000
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	(23,800,000)	(4,700,000)
Capital expenditures	(32,600,000)	(25,400,000)
Proceeds from sale of property and equipment	3,400,000	3,400,000
Payments for other investments	(1,100,000)
Net cash used in investing activities	(54,100,000)	(26,700,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	76,500,000	(134,000,000)
Proceeds from senior notes, net		250,000,000
Repayments of other borrowings and capital lease obligations	(12,900,000)	(19,100,000)
Payments of financing costs, including call premiums on extinguishment of debt	(200,000)	(11,000,000)
Net financing activities and advances (to) from consolidated affiliates	(24,700,000)	(12,900,000)
Net cash provided by financing activities	39,400,000	68,700,000
Net (decrease) increase in cash and cash equivalents	500,000	92,300,000
Net effect of currency translation on cash	0	(100,000)
Cash and cash equivalents - beginning of period	5,300,000	12,700,000
Cash and cash equivalents - end of period	5,800,000	104,900,000
Cash and cash equivalents of discontinued operations	0	0
Cash and cash equivalents of continuing operations	5,800,000	104,900,000
Guarantor Subsidiaries [Member] | Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities		(5,000,000)
Guarantor Subsidiaries [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	700,000	700,000
Non-Guarantor Subsidiaries [Member]
Condensed Unaudited Consolidating Statements of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	(35,300,000)	(23,600,000)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	0	0
Capital expenditures	(3,000,000)	(400,000)
Proceeds from sale of property and equipment	0	0
Payments for other investments	0
Net cash used in investing activities	(3,000,000)	(400,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	0	0
Proceeds from senior notes, net		0
Repayments of other borrowings and capital lease obligations	(900,000)	0
Payments of financing costs, including call premiums on extinguishment of debt	0	0
Net financing activities and advances (to) from consolidated affiliates	25,500,000	15,100,000
Net cash provided by financing activities	24,600,000	15,100,000
Net (decrease) increase in cash and cash equivalents	(13,700,000)	(8,900,000)
Net effect of currency translation on cash	(500,000)	0
Cash and cash equivalents - beginning of period	17,700,000	14,100,000
Cash and cash equivalents - end of period	3,500,000	5,200,000
Cash and cash equivalents of discontinued operations	0	900,000
Cash and cash equivalents of continuing operations	3,500,000	4,300,000
Non-Guarantor Subsidiaries [Member] | Earn-out Arrangements [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities		0
Non-Guarantor Subsidiaries [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	$ 0	$ 0

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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

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The Company’s financial instruments include cash and cash equivalents, accounts and notes receivable, cash collateral deposited with insurance carriers, life insurance assets, cost and equity method investments, deferred compensation plan assets and liabilities, accounts payable and other current liabilities, acquisition-related contingent consideration and debt obligations.

Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value guidance establishes a valuation hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:

Level 1 - Quoted market prices in active markets for identical assets or liabilities.

Level 2 - Observable market based inputs or other observable inputs.

Level 3 - Significant unobservable inputs that cannot be corroborated by observable market data. These values are generally determined using valuation models incorporating management’s estimates of market participant assumptions.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

As of March 31, 2014, the Company held certain assets and liabilities required to be measured at fair value on a recurring basis. The fair value hierarchy requires the use of observable market data when available. In instances in which the inputs used to measure fair value fall into different levels of the fair value hierarchy, the fair value measurement classification below has been determined based on the lowest level input that is significant to the fair value measurement in its entirety.  Management’s assessment of the significance of a particular item to the fair value measurement in its entirety requires judgment, including the consideration of inputs specific to the asset or liability.  The fair values of financial assets and liabilities measured on a recurring basis were determined using the following inputs as of the dates indicated (in millions):

			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of March 31, 2014		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.5	$	5.5
Liabilities
Acquisition-related contingent consideration	$	170.3				$	170.3
			Fair Value Measurements Using Inputs Considered as Significant
	Fair Value as of December 31, 2013		Level 1		Level 2	Level 3
Assets
Life insurance surrender values	$	5.3	$	5.3
Liabilities
Acquisition-related contingent consideration	$	162.9				$	162.9

Life Insurance Surrender Values. Cash surrender values of life insurance policies are based on current cash surrender values as quoted by insurance carriers. Life insurance policies support the Company’s deferred compensation plan assets and certain of its split dollar agreements.

Acquisition-Related Contingent Consideration. Acquisition-related contingent consideration presented in the table above represents the estimated fair value of additional future earn-outs payable for acquisitions of businesses that closed after January 1, 2009, in accordance with U.S. GAAP. The fair value of such acquisition-related contingent consideration is based on management’s estimates and entity-specific assumptions and is evaluated on an on-going basis. Additions to acquisition-related contingent consideration totaled $8.7 million for the three month period ended March 31, 2014. There were no additions for the three month period ended March 31, 2013. The Company made no payments in connection with acquisition-related contingent consideration obligations measured at fair value on a recurring basis for the three months ended March 31, 2014. The Company paid approximately $0.6 million for the three month period ended March 31, 2013. Foreign currency translation gains included in other comprehensive income totaled $1.4 million and $0.4 million for the three month periods ended March 31, 2014 and 2013, respectively.

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

Assets and liabilities recognized or disclosed at fair value on a non-recurring basis, which are initially measured at fair value, and are subsequently remeasured in the event of an impairment or other measurement event, if applicable, include items such as cost and equity method investments, goodwill, other intangible assets, long-lived assets and debt.

Carrying amounts and estimated fair values of selected financial instruments measured on a non-recurring basis as of the dates indicated were as follows (in millions):     

	March 31, 2014				December 31, 2013
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
4.875% Senior Notes	$	400.0	$	390.5	$	400.0	$	380.0
2009 Convertible Notes	$	12.6	$	35.0	$	12.6	$	26.6
2011 Convertible Notes	$	199.7	$	563.2	$	198.3	$	428.3

The estimated fair values of the Company’s 4.875% Senior Notes, 2009 Convertible Notes and 2011 Convertible Notes are based on quoted market prices, a Level 1 input.

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The following table provides a reconciliation of changes in goodwill by reportable segment (in millions):

	Communications		Oil and Gas			Electrical Transmission		Power Generation and Industrial		Total Goodwill
Balance as of December 31, 2013	$	327.9	$	305.2		$	149.8	$	117.6	$	900.5
Additions from new business combinations	14.5		—			—		—		14.5
Currency translation adjustments	—		(2.1		)	—		—		(2.1		)
Balance as of March 31, 2014	$	342.4	$	303.1		$	149.8	$	117.6	$	912.9

The following table provides a reconciliation of changes in other intangible assets (in millions):

	Other Intangible Assets
	Non-amortizing					Amortizing
	Trade Names		Pre-Qualifications			Customer Relationships and Backlog			Other (a)			Total
Other intangible assets, gross carrying amount as of December 31, 2013	$	34.8	$	59.4		$	128.4		$	22.5		$	245.1
Accumulated amortization						$	(67.7	)	$	(11.8	)	$	(79.5	)
Other intangible assets, net, as of December 31, 2013	$	34.8	$	59.4		$	60.7		$	10.7		$	165.6
Additions from new business combinations	—		—			11.7			0.3			12.0
Amortization expense						(4.2		)	(0.4		)	(4.6		)
Currency translation adjustments	—		(1.1		)	(0.2		)	(0.1		)	(1.4		)
Other intangible assets, net, as of March 31, 2014	$	34.8	$	58.3		$	68.0		$	10.5		$	171.6

(a) Consists principally of trade names and non-compete agreements.

Amortization expense associated with intangible assets for the three month periods ended March 31, 2014 and 2013 totaled $4.6 million and $4.2 million, respectively.

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Related Party Transactions

3 Months Ended

Mar. 31, 2014

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

MasTec purchases, rents and leases equipment used in its business from a number of different vendors on a non-exclusive basis, including Cross Country Pipeline Supply, Inc. (“CCP”), in which MasTec invested $15 million for a 14.85% ownership interest effective November 8, 2013. Juan Carlos Mas, who is the brother of Jorge Mas, Chairman of MasTec's Board of Directors, and Jose Mas, MasTec's Chief Executive Officer, serves as the chairman of CCP. In addition, an entity owned by the Mas family, including Jorge and Jose Mas, is a minority shareholder of CCP. MasTec paid CCP approximately $0.9 million for equipment rentals, leases and servicing for the three month period ended March 31, 2014.

MasTec leases employees to a customer, in which Jorge Mas and Jose Mas own a minority interest. For the three month periods ended March 31, 2014 and 2013, MasTec charged to the customer approximately $0.2 million and $0.1 million, respectively. As of both March 31, 2014 and December 31, 2013, receivables of $0.1 million attributable to this arrangement were outstanding. The Company also provides satellite communication services to this customer. For both of the three month periods ended March 31, 2014 and 2013, revenues relating to this customer were approximately $0.3 million. As of both March 31, 2014 and December 31, 2013, outstanding receivables from this arrangement totaled $0.4 million.        

Split Dollar and Deferred Bonus Agreements

MasTec has a split dollar agreement with Jorge Mas. The Company made no payments in connection with this agreement in either of the three month periods ended March 31, 2014 or 2013. MasTec also has a split dollar agreement and a deferred bonus agreement with Jose Mas. For the three month periods ended March 31, 2014 and 2013, no payments were made in connection with the agreements for Jose Mas. As of March 31, 2014 and December 31, 2013, life insurance assets associated with these agreements of $10.1 million and $10.2 million, respectively, are included within other long-term assets in the condensed unaudited consolidated balance sheets. For additional information regarding the foregoing agreements with Jorge Mas and Jose Mas, see Note 17 - Related Party Transactions in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

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Equity

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Equity

Equity

The following is a summary of share activity for the period indicated:

Share Activity (in thousands):	Common Shares Outstanding		Treasury Shares
Balance as of December 31, 2013	77,258		9,467
Shares issued for stock option exercises	201
Shares issued for restricted stock awards	141
Other shares issued, net of shares withheld for taxes	(73	)
Balance as of March 31, 2014	77,527		9,467

Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss by component during the periods indicated are as follows (in thousands):

	For the Three Months Ended March 31,
	2014									2013
	Unrealized (Losses) Gains
	Foreign Currency			Available-for-Sale Securities			Total			Foreign Currency			Available-for-Sale Securities			Total
Balance as of January 1	$	(7,998	)	$	(5,288	)	$	(13,286	)	$	(105	)	$	(5,396	)	$	(5,501	)
Activity before reclassifications, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Reclassifications, net of tax	—			—			—			—			—			—
Activity, net of tax	(5,335		)	—			(5,335		)	(824		)	221			(603		)
Balance as of March 31	$	(13,333	)	$	(5,288	)	$	(18,621	)	$	(929	)	$	(5,175	)	$	(6,104	)

Foreign currency activity is primarily related to the Company's Canadian operations. The Company's Canadian presence has grown in recent years due to acquisitions. See Note 3 - Acquisitions.

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Commitments and Contingencies (Collective Bargaining Agreements and Multi-Employer Plans) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Nov. 15, 2011
Loss Contingencies [Line Items]
Multi-employer plans, collective bargaining arrangement, description	Certain of MasTec’s subsidiaries are party to various collective bargaining agreements with unions representing certain of their employees. The agreements require the subsidiaries party to the agreements to pay specified wages, provide certain benefits to their union employees and contribute certain amounts to multi-employer pension plans and employee benefit trusts. The collective bargaining agreements expire at various times and have typically been renegotiated and renewed on terms similar to the ones contained in the expiring agreements.
Multi-Employer Plans, Pension [Member] | Withdrawal from Multi-Employer Defined Benefit Plan [Member] | Central States Southeast And Southwest Areas Pension Fund [Member]
Loss Contingencies [Line Items]
Loss contingency, evaluation of estimated loss	On November 15, 2011, the Company, along with other members of the Pipe Line Contractors Association (“PLCA”), voluntarily withdrew from the Central States Southeast and Southwest Areas Pension Fund (“Central States”), a defined benefit multi-employer pension plan that is in critical status. In connection with this withdrawal, a $6.4 million withdrawal liability was established based on an estimate provided by the Central States administrator of such liability as of the date of withdrawal. The Company began paying installments towards this withdrawal liability in 2013, of which $5.1 million was outstanding as of March 31, 2014. The Company withdrew from Central States in order to mitigate its liability in connection with the plan; however, Central States has asserted that the PLCA members did not effectively withdraw in 2011 and are, therefore, responsible for a withdrawal liability that includes 2011 contribution amounts. By letter dated March 14, 2013, Central States demanded $11 million in withdrawal liability from the Company, which included 2011 contribution amounts. The Company is vigorously opposing this demand because it believes that it legally and effectively withdrew from Central States on November 15, 2011. If Central States were to prevail in its assertion that the Company withdrew after that date, then the initial amount of the Company’s withdrawal liability would increase to approximately $11 million. In addition, if Central States were to undergo a mass withdrawal, as defined by ERISA and the Pension Benefit Guaranty Corporation, within the three year period commencing with the beginning of the calendar year during which the Company withdrew from the plan, there could be additional liability.
Withdrawal liability	$ 5.1	$ 6.4
Maximum loss	$ 11

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Property and Equipment, Net

3 Months Ended

Mar. 31, 2014

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

Property and Equipment, Net

The following table provides details of property and equipment, net, including property and equipment held under capital leases as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Land	$	4.6		$	4.8
Buildings and leasehold improvements	17.6			18.0
Machinery and equipment	752.2			727.1
Office furniture and equipment	108.0			102.5
Construction in progress	16.9			11.0
Total property and equipment	$	899.3		$	863.4
Less accumulated depreciation and amortization	(389.7		)	(375.3		)
Property and equipment, net	$	509.6		$	488.1

Depreciation and amortization expense associated with property and equipment for the three month periods ended March 31, 2014 and 2013 totaled $28.9 million and $27.6 million, respectively.

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Property And Equipment, Net (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Property and Equipment [Line Items]
Depreciation and amortization	$ 33,494	$ 31,753
Property and Equipment [Member]
Property and Equipment [Line Items]
Depreciation and amortization	$ 28,900	$ 27,600

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Accounts Receivable, Net of Allowance

3 Months Ended

Mar. 31, 2014

Receivables [Abstract]

Accounts Receivable, Net of Allowance

Accounts Receivable, Net of Allowance

The following table provides details of accounts receivable, net of allowance, as of the dates indicated (in millions):

	March 31, 2014			December 31, 2013
Contract billings	$	627.1		$	606.5
Retainage	135.6			159.3
Costs and earnings in excess of billings	448.6			384.6
Accounts receivable, gross	$	1,211.3		$	1,150.4
Less allowance for doubtful accounts	(15.7		)	(15.8		)
Accounts receivable, net	$	1,195.6		$	1,134.6

Provisions for doubtful accounts were $0.6 million and $3.3 million, respectively, for the three month periods ended March 31, 2014 and March 31, 2013.

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Debt

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Debt

Debt

The following table provides details of the carrying values of debt as of the dates indicated (in millions):

Description	Maturity Date	March 31, 2014			December 31, 2013
Credit facility	October 29, 2018	$	128.6		$	53.0
4.875% senior notes	March 15, 2023	400.0			400.0
2011 4.0% senior convertible notes	June 15, 2014	104.6			103.8
2011 4.25% senior convertible notes	December 15, 2014	95.1			94.5
2009 4.0% senior convertible notes	June 15, 2014	9.6			9.6
2009 4.25% senior convertible notes	December 15, 2014	3.0			3.0
Capital lease obligations, weighted average interest rate of 2.9%	In installments through March 30, 2020	123.2			126.0
Notes payable for equipment, weighted average interest rate of 3.0%	In installments through May 1, 2018	30.1			26.9
Total debt		$	894.2		$	816.8
Less current maturities		(52.9		)	(51.4		)
Long-term debt		$	841.3		$	765.4

Credit Facility

The Company has a senior secured credit facility, referred to as the 2013 Credit Facility. The 2013 Credit Facility matures on October 29, 2018 and has a maximum available borrowing capacity of $750 million, of which up to $100 million may be borrowed in Canadian dollars. As of March 31, 2014 and December 31, 2013, the Company had outstanding revolving loans under the 2013 Credit Facility of $128.6 million and $53.0 million, respectively, which accrued interest at a weighted average rate of approximately 2.08% and 2.14% per annum, respectively. Letters of credit of approximately $134.7 million and $134.8 million were outstanding as of March 31, 2014 and December 31, 2013, respectively. The remaining borrowing capacity of $486.8 million and $562.1 million as of March 31, 2014 and December 31, 2013, respectively, was available for revolving loans, or up to $315.3 million and $315.2 million, respectively, of new letters of credit. Outstanding letters of credit mature at various dates and most have automatic renewal provisions, subject to prior notice of cancellation. As of March 31, 2014 and December 31, 2013, interest on outstanding letters of credit accrued at 0.75% per annum for performance standby letters of credit and at 1.50% per annum for financial standby letters of credit. The unused facility fee was 0.30%as of both March 31, 2014 and December 31, 2013. The 2013 Credit Facility is guaranteed by certain subsidiaries of the Company.

For additional information regarding the Company's 2013 Credit Facility see Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Senior Convertible Notes

Unamortized debt discount and financing costs associated with the Company's 2011 Convertible Notes totaled $2.7 million and $4.0 million as of March 31, 2014 and December 31, 2013, respectively. The 4.0% senior convertible notes mature in June 2014 and the 4.25% senior convertible notes mature in December 2014. The Company expects to refinance the $215.0 million principal amount of its senior convertible notes on a long-term basis either through its 2013 Credit Facility or through other sources of available funding and, therefore, has reflected the carrying amounts of these notes within long-term debt in the Company's condensed unaudited consolidated balance sheets.

For additional information regarding the Company's senior convertible notes, see Note 9 - Debt in the notes to the Company's consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2013.

Debt Guarantees and Covenants

The Company’s 4.875% Senior Notes, 2011 Convertible Notes and 2009 Convertible Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of the 2013 Credit Facility or other outstanding indebtedness. See Note 18 - Supplemental Guarantor Condensed Unaudited Consolidating Financial Information.

MasTec was in compliance with all provisions and covenants pertaining to its outstanding debt instruments as of March 31, 2014 and December 31, 2013.

Interest Expense, Net

The following table provides details of interest expense, net, for the periods indicated (in millions):

	For the Three Months Ended March 31,
	2014		2013
Interest expense:
Contractual and other interest expense	$	9.7	$	7.9
Accretion of senior convertible note discount	1.4		1.3
Amortization of deferred financing costs	0.9		0.9
Total interest expense	$	12.0	$	10.1
Interest income	0.0		(0.1		)
Interest expense, net	$	12.0	$	10.0

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Lease Obligations

3 Months Ended

Mar. 31, 2014

Leases [Abstract]

Lease Obligations

Lease Obligations

Capital Leases

MasTec enters into agreements that provide financing for machinery and equipment, which expire on various dates. The gross amount of assets held under capital leases as of March 31, 2014 and December 31, 2013 totaled $207.8 million and $199.6 million, respectively. Assets held under capital leases, net of accumulated depreciation, totaled $144.1 million and $141.3 million as of March 31, 2014 and December 31, 2013, respectively.

Operating Leases

In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facility, vehicle and equipment needs, including related party leases. Rent expense relating to operating leases that have non-cancelable terms in excess of one year was approximately $15.5 million and $11.9 million for the three month periods ended March 31, 2014 and 2013, respectively. The Company also incurred expenses relating to facilities, vehicles and equipment having original terms of one year or less of approximately $48.4 million and $36.9 million for the three month periods ended March 31, 2014 and 2013, respectively.

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Debt (Schedule Of Interest Expense, Net) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest expense:
Contractual and other interest expense	$ 9,700,000	$ 7,900,000
Accretion of senior convertible note discount	1,400,000	1,300,000
Amortization of deferred financing costs	900,000	900,000
Total interest expense	12,000,000	10,100,000
Interest income	0	(100,000)
Interest expense, net	$ 12,003,000	$ 10,045,000

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Commitments and Contingencies (Concentrations of Risk) (Narrative) (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Concentration Risk [Line Items]
Number of customers	290
Ten Largest Customers [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Concentration Risk [Line Items]
Significant customer, percentage of consolidated revenue	73.00%	69.00%

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Lease Obligations (Operating Lease Obligations) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Lease Term In Excess Of One Year [Member]
Operating Leased Assets [Line Items]
Operating leases, rent expense	$ 15.5	$ 11.9
Lease Term Less Than One Year [Member]
Operating Leased Assets [Line Items]
Operating leases, rent expense	$ 48.4	$ 36.9

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Debt (Debt Guarantees and Covenants) (Narrative) (Details)	3 Months Ended
	Mar. 31, 2014
Debt Instrument [Line Items]
Debt instrument, covenant compliance	MasTec was in compliance with all provisions and covenants pertaining to its outstanding debt instruments as of March 31, 2014 and December 31, 2013.
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of voting interests owned, guarantor subsidiaries	100.00%
Total Senior And Senior Convertible Notes [Member] | Senior Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, guarantees	The Company’s 4.875% Senior Notes, 2011 Convertible Notes and 2009 Convertible Notes are fully and unconditionally guaranteed on an unsecured, unsubordinated, joint and several basis by certain of the Company's existing and future 100%-owned direct and indirect domestic subsidiaries that are guarantors of the 2013 Credit Facility or other outstanding indebtedness.

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Stock-Based Compensation and Other Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

Share-based Compensation [Abstract]

Summary of Restricted Share Award Activity

Activity, restricted share awards:	Restricted Shares		Weighted Average Grant Date Fair Value
Non-vested restricted shares, as of December 31, 2013	1,123,545		$	23.78
Granted	326,442		41.39
Vested	(141,138	)	19.41
Canceled/forfeited	(13,450	)	16.05
Non-vested restricted shares, as of March 31, 2014	1,295,399		$	28.77

Summary of Stock Option Activity

Activity, stock options:	StockOptions		Per Share Weighted AverageExercise Price		Weighted Average Remaining Contractual Life(in years)	Aggregate Intrinsic Value (a)(in millions)
Options outstanding as of December 31, 2013	495,571		$	11.17	1.96	$	10.7
Exercised	(200,900	)	9.77
Canceled/forfeited	—		—
Options outstanding as of March 31, 2014	294,671		$	12.13	2.04	$	9.2
Options exercisable as of March 31, 2014	294,671		$	12.13	2.04	$	9.2

(a) Amount represents the difference between the exercise price and the market price of the Company’s stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.

Summary of Employee Stock Purchase Plan Activity

	Three Months Ended March 31,
Activity, employee stock purchase plan:	2014		2013
Cash proceeds (in millions)	$	0.8	$	0.9
Common shares issued	26,968		67,556
Weighted average price per share	$	27.81	$	13.19
Weighted average grant date fair value per share	$	6.59	$	5.00

Summary of Stock-Based Compensation Expense And Related Tax Benefits

Details of stock based compensation expense, which is included within general and administrative expense in the condensed unaudited consolidated statement of operations, and related tax benefits for the periods indicated are as follows (in millions):

	Three Months Ended March 31,
	2014		2013
Stock-based compensation expense	$	3.3	$	2.4
Income Tax Effects:
Income tax benefit from stock-based compensation	$	4.5	$	1.5
Excess tax benefit from stock-based compensation (a)	$	3.2	$	0.9

(a) Excess tax benefits, which represent cash flows from tax deductions in excess of the recorded tax effect of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

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Goodwill and Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 4.6	$ 4.2

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Segments and Related Information

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Segments and Related Information

Segments and Related Information    

Segment Discussion

MasTec presents its continuing operations in five reportable segments: (1) Communications; (2) Oil and Gas; (3) Electrical Transmission; (4) Power Generation and Industrial and (5) Other. This structure is generally focused on broad end-user markets for MasTec's labor-based construction services.All five reportable segments derive their revenues from the engineering, installation and maintenance of infrastructure, primarily in North America.

The Communications segment performs engineering, construction and maintenance of communications infrastructure primarily related to wireless and wireline communications and install to the home, and to a lesser extent, infrastructure for electrical utilities.MasTec performs engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities for the energy and utilities industries through its Oil and Gas segment.The Electrical Transmission segment primarily serves the energy and utility industries through the engineering, construction and maintenance of electrical transmission lines and substations.The Power Generation and Industrial segment primarily serves the energy and utility end markets and other end markets through the installation and construction of renewable power facilities, related electrical transmission infrastructure, ethanol facilities and various types of industrial infrastructure.The Other segment primarily includes small business units that perform construction services for a variety of end markets in Mexico and elsewhere internationally.

Earnings before interest, taxes, depreciation and amortization (“EBITDA”) is the measure of profitability used by management to manage its segments and, accordingly, in its segment reporting. As appropriate, the Company supplements the reporting of consolidated financial information determined in accordance with U.S. GAAP with certain non-U.S. GAAP financial measures, including EBITDA. The Company believes these non-U.S. GAAP measures provide meaningful information that helps investors understand the Company's financial results and assess its prospects for future performance. The Company uses EBITDA to evaluate its performance, both internally and versus that of its peers, because it excludes certain items that may not be indicative of the Company's reportable segment results, as well as items that can vary widely across different industries or among companies within the same industry. Segment EBITDA is calculated in a manner consistent with consolidated EBITDA.

Summarized financial information for MasTec’s reportable segments is presented and reconciled to consolidated continuing operations financial information for total MasTec in the following tables (in millions):

	For the Three Months Ended March 31,
Revenue:	2014		2013
Communications	$	447.1	$	424.9
Oil and Gas	379.8		318.8
Electrical Transmission	80.1		84.6
Power Generation and Industrial	54.2		88.9
Other	2.8		2.3
Eliminations	0.0		(0.9		)
Consolidated revenue	$	964.0	$	918.6

Revenue generated by utilities customers represented 7.0% and 8.3% of Communications segment revenue for the three month periods ended March 31, 2014 and 2013, respectively.

	For the Three Months Ended March 31,
EBITDA:	2014			2013
Communications	$	43.4		$	46.4
Oil and Gas	34.9			42.4
Electrical Transmission	3.5			3.4
Power Generation and Industrial	0.5			(0.2		)
Other	0.2			0.1
Corporate	(10.9		)	(18.6		)
Consolidated EBITDA	$	71.6		$	73.5

	For the Three Months Ended March 31,
Depreciation and Amortization:	2014		2013
Communications	$	9.9	$	8.2
Oil and Gas	18.1		18.7
Electrical Transmission	2.8		2.3
Power Generation and Industrial	1.5		1.7
Corporate	1.2		0.9
Consolidated Depreciation and Amortization	$	33.5	$	31.8

The following table presents a reconciliation of EBITDA to consolidated income from continuing operations before income taxes (in millions):

	For the Three Months Ended March 31,
EBITDA Reconciliation:	2014			2013
EBITDA	$	71.6		$	73.5
Less:
Interest expense, net	(12.0		)	(10.0		)
Depreciation and amortization	(33.5		)	(31.8		)
Income from continuing operations before income taxes	$	26.1		$	31.7

Foreign Operations. MasTec operates throughout North America, primarily in the United States and Canada, as well as in parts of Latin America. For the three months ended March 31, 2014 and 2013, revenues of $837.9 million and $878.9 million, respectively, were derived in the United States, and $126.1 million and $39.7 million, respectively, were derived from foreign operations. Long-lived assets held in the United States include property and equipment, net, of $461.8 million and $436.9 million as of March 31, 2014 and December 31, 2013, respectively. Long-lived assets held in foreign countries, primarily in Canada, include property and equipment, net, of $47.8 million and $51.2 million as of March 31, 2014 and December 31, 2013, respectively. Intangible assets and goodwill, net of $995.8 million and $973.3 million as of March 31, 2014 and December 31, 2013, respectively, relate to businesses in the United States. Intangible assets and goodwill, net, of $88.6 million and $92.7 million as of March 31, 2014 and December 31, 2013, respectively, relate to businesses in foreign countries.

Significant Customers

Revenue concentration information for significant customers as a percent of total consolidated revenue was as follows:

	For the Three Months Ended March 31,
	2014	2013
Customer:
AT&T	22%	18%
DIRECTV®	14%	16%
Enbridge, Inc.	14%	12%

The Company's relationship with AT&T is based upon master service agreements, other service agreements and construction/installation contracts for AT&T's wireless, wireline and home security and automation businesses. Revenue from AT&T is included in the Communications segment.The Company's relationship with DIRECTV® is based upon an agreement to provide installation and maintenance services for DIRECTV®. Revenue from DIRECTV® is included in the Communications segment.The Company's relationship with Enbridge, Inc. is based upon various construction contracts for natural gas pipelines. Revenue from Enbridge, Inc. is included in the Oil and Gas segment.

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Line Items]

Schedule of Earnings Per Share Information

The following table provides details underlying the Company’s earnings per share calculations for the periods indicated (in thousands):

	For the Three Months Ended March 31,
	2014			2013
Net income attributable to MasTec:
Net income, continuing operations - basic (a)	$	16,145		$	19,317
Interest expense, net of tax, 2009 Convertible Notes	78			77
Net income, continuing operations - diluted	$	16,223		$	19,394
Net loss from discontinued operations - basic and diluted (a)	(122		)	(947		)
Net income attributable to MasTec - diluted	$	16,101		$	18,447
Weighted average shares outstanding:
Weighted average shares outstanding - basic	77,345			76,608
Dilutive common stock equivalents	850			785
Dilutive premium shares, 2011 Convertible Notes	7,621			5,895
Dilutive shares, 2009 Convertible Notes	806			806
Weighted average shares outstanding - diluted	86,622			84,094

(a) Calculated as total net income less amounts attributable to non-controlling interests.

2011 Convertible Notes [Member]

Earnings Per Share [Line Items]

Schedule of Convertible Note Premium Share Information

The calculations underlying the number of premium shares included in the Company’s diluted share count for the periods indicated are as follows (in thousands, except per share amounts):

	As of and for the Three Months Ended March 31,
	2014				2013
Premium Share Information:	2011 4.0% Notes		2011 4.25% Notes		2011 4.0% Notes		2011 4.25% Notes
Number of conversion shares, principal amount	6,683		6,268		6,683		6,268
Weighted average actual per share price	$	37.96	$	37.96	$	28.68	$	28.68
Weighted average premium value	$	148,360	$	140,925	$	86,316	$	82,735
Weighted average equivalent premium shares	3,909		3,712		3,010		2,885

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Goodwill and Other Intangible Assets (Rollforward of Goodwill by Segment) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Goodwill [Line Items]
Goodwill, beginning balance	$ 900,454,000
Additions from new business combinations, goodwill	14,500,000
Currency translation adjustments, goodwill	(2,100,000)
Goodwill, ending balance	912,885,000
Operating Segments [Member] | Communications [Member]
Goodwill [Line Items]
Goodwill, beginning balance	327,900,000
Additions from new business combinations, goodwill	14,500,000
Currency translation adjustments, goodwill	0
Goodwill, ending balance	342,400,000
Operating Segments [Member] | Oil and Gas [Member]
Goodwill [Line Items]
Goodwill, beginning balance	305,200,000
Additions from new business combinations, goodwill	0
Currency translation adjustments, goodwill	(2,100,000)
Goodwill, ending balance	303,100,000
Operating Segments [Member] | Electrical Transmission [Member]
Goodwill [Line Items]
Goodwill, beginning balance	149,800,000
Additions from new business combinations, goodwill	0
Currency translation adjustments, goodwill	0
Goodwill, ending balance	149,800,000
Operating Segments [Member] | Power Generation and Industrial [Member]
Goodwill [Line Items]
Goodwill, beginning balance	117,600,000
Additions from new business combinations, goodwill	0
Currency translation adjustments, goodwill	0
Goodwill, ending balance	$ 117,600,000

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Earnings Per Share (Schedule Of Earnings Per Share Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Net income attributable to MasTec:
Net income, continuing operations - basic	$ 16,145	[1]	$ 19,317	[1]
Net loss from discontinued operations - basic and diluted	(122)	[1]	(947)	[1]
Net income attributable to MasTec - diluted	16,101		18,447
Weighted average shares outstanding:
Weighted average shares outstanding - basic	77,345		76,608
Dilutive common stock equivalents	850		785
Weighted average shares outstanding - diluted	86,622		84,094
Continuing Operations [Member]
Net income attributable to MasTec:
Net income attributable to MasTec - diluted	16,223		19,394
Convertible Debt [Member] | 2009 Convertible Notes [Member]
Net income attributable to MasTec:
Interest expense, net of tax, 2009 Convertible Notes	$ 78		$ 77
Weighted average shares outstanding:
Dilutive shares, 2009 Convertible Notes	806		806
Convertible Debt [Member] | 2011 Convertible Notes [Member]
Weighted average shares outstanding:
Dilutive premium shares, 2011 Convertible Notes	7,621		5,895

[1] Calculated as total net income less amounts attributable to non-controlling interests.

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Condensed Unaudited Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	145,000,000	145,000,000
Common stock, shares issued	86,993,988	86,725,372
Treasury stock, shares	9,467,286	9,467,286

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information (Condensed Unaudited Consolidating Statements Of Operations and Comprehensive Income) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items]
Revenue	$ 964,029,000	$ 918,648,000
Costs of revenue, excluding depreciation and amortization	841,054,000	791,499,000
Depreciation and amortization	33,494,000	31,753,000
General and administrative expenses	53,327,000	48,885,000
Interest expense, net	12,003,000	10,045,000
Loss on extinguishment of debt	0	5,624,000
Other (income) expense, net	(1,955,000)	(826,000)
Income from continuing operations before income taxes	26,106,000	31,668,000
Benefit from (provision for) income taxes	(9,916,000)	(12,348,000)
Net income from continuing operations	16,190,000	19,320,000
Net loss from discontinued operations	(122,000)	(947,000)
Equity in income from subsidiaries, net of tax	0	0
Net income	16,068,000	18,373,000
Net income attributable to non-controlling interests	45,000	3,000
Net income attributable to MasTec, Inc.	16,023,000	18,370,000
Comprehensive income (loss)	10,733,000	17,770,000
Eliminations [Member]
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items]
Revenue	0	(1,700,000)
Costs of revenue, excluding depreciation and amortization	0	(1,700,000)
Depreciation and amortization	0	0
General and administrative expenses	0	0
Interest expense, net	0	0
Loss on extinguishment of debt		0
Other (income) expense, net	0	0
Income from continuing operations before income taxes	0	0
Benefit from (provision for) income taxes	0	0
Net income from continuing operations	0	0
Net loss from discontinued operations	0	0
Equity in income from subsidiaries, net of tax	(16,400,000)	(18,800,000)
Net income	(16,400,000)	(18,800,000)
Net income attributable to non-controlling interests	0	0
Net income attributable to MasTec, Inc.	(16,400,000)	(18,800,000)
Comprehensive income (loss)	(11,000,000)	(18,000,000)
MasTec, Inc. [Member]
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items]
Revenue	0	0
Costs of revenue, excluding depreciation and amortization	0	0
Depreciation and amortization	0	0
General and administrative expenses	600,000	300,000
Interest expense, net	0	0
Loss on extinguishment of debt		0
Other (income) expense, net	0	0
Income from continuing operations before income taxes	(600,000)	(300,000)
Benefit from (provision for) income taxes	200,000	100,000
Net income from continuing operations	(400,000)	(200,000)
Net loss from discontinued operations	0	0
Equity in income from subsidiaries, net of tax	16,400,000	18,800,000
Net income	16,000,000	18,600,000
Net income attributable to non-controlling interests	0	0
Net income attributable to MasTec, Inc.	16,000,000	18,600,000
Comprehensive income (loss)	10,600,000	17,800,000
Guarantor Subsidiaries [Member]
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items]
Revenue	793,100,000	843,100,000
Costs of revenue, excluding depreciation and amortization	689,800,000	721,200,000
Depreciation and amortization	27,400,000	28,900,000
General and administrative expenses	47,300,000	45,100,000
Interest expense, net	11,700,000	10,000,000
Loss on extinguishment of debt		5,600,000
Other (income) expense, net	(2,100,000)	(900,000)
Income from continuing operations before income taxes	19,000,000	33,200,000
Benefit from (provision for) income taxes	(9,400,000)	(13,000,000)
Net income from continuing operations	9,600,000	20,200,000
Net loss from discontinued operations	0	0
Equity in income from subsidiaries, net of tax	0	0
Net income	9,600,000	20,200,000
Net income attributable to non-controlling interests	0	0
Net income attributable to MasTec, Inc.	9,600,000	20,200,000
Comprehensive income (loss)	9,500,000	20,500,000
Non-Guarantor Subsidiaries [Member]
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items]
Revenue	170,900,000	77,200,000
Costs of revenue, excluding depreciation and amortization	151,300,000	72,000,000
Depreciation and amortization	6,100,000	2,900,000
General and administrative expenses	5,400,000	3,500,000
Interest expense, net	300,000	0
Loss on extinguishment of debt		0
Other (income) expense, net	100,000	0
Income from continuing operations before income taxes	7,700,000	(1,200,000)
Benefit from (provision for) income taxes	(700,000)	500,000
Net income from continuing operations	7,000,000	(700,000)
Net loss from discontinued operations	(100,000)	(900,000)
Equity in income from subsidiaries, net of tax	0	0
Net income	6,900,000	(1,600,000)
Net income attributable to non-controlling interests	100,000	0
Net income attributable to MasTec, Inc.	6,800,000	(1,600,000)
Comprehensive income (loss)	$ 1,600,000	$ (2,500,000)

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Discontinued Operations

3 Months Ended

Mar. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

Discontinued Operations

Globetec

In 2012, the Company's board of directors approved a plan of sale for its Globetec business. Accordingly, Globetec's projects and assets are reflected as assets and liabilities of discontinued operations in the condensed unaudited consolidated balance sheets for all periods presented, and Globetec's results of operations are presented as discontinued operations in the condensed unaudited consolidated statements of operations for all periods presented. Effective August 31, 2013, the Company sold all of its membership interests in Globetec for nominal consideration and retained certain contingent assets and liabilities. Additionally, the Company has $15.9 million of outstanding surety bonds associated with Globetec as of March 31, 2014 for projects that Globetec has either completed or expects to complete in 2014. The expected cost to complete these projects was estimated to be $0.5 million as of March 31, 2014. The Company believes that there was an insignificant amount at risk under these surety bonds as of March 31, 2014. The Company is not obligated and does not intend to support Globetec in the future.

The following table contains a summary of the contingent assets and liabilities associated with Globetec that were retained by the Company as of March 31, 2014 and as of December 31, 2013 (in millions):

	March 31, 2014		December 31, 2013
Current assets	$	3.4	$	2.3
Long-term assets	10.1		10.1
Assets of discontinued operations	$	13.5	$	12.4
Current liabilities of discontinued operations	$	1.3	$	1.2

The following table presents results from discontinued operations associated with the Globetec operation for the periods indicated (in millions):

	For the Three Months Ended March 31, 2013
Revenue	$	6.3
Loss from operations, before tax	(1.2		)
Benefit from income taxes	0.3
Net loss from discontinued operations	$	(0.9	)

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Accounts Receivable, Net of Allowance (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Receivables [Abstract]
Provision for doubtful accounts	$ 0.6	$ 3.3

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Segments and Related Information (Schedule of Significant Customers, Revenue Concentration Information) (Details) (Operating Segments [Member], Customer Concentration Risk [Member], Revenue [Member])	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
AT&T [Member] | Communications [Member]
Revenue, Significant Customer [Line Items]
Significant customer, percentage of consolidated revenue	22.00%	18.00%
Segment reporting, disclosure of significant customers	The Company's relationship with AT&T is based upon master service agreements, other service agreements and construction/installation contracts for AT&T's wireless, wireline and home security and automation businesses. Revenue from AT&T is included in the Communications segment.
DIRECTV[Member] | Communications [Member]
Revenue, Significant Customer [Line Items]
Significant customer, percentage of consolidated revenue	14.00%	16.00%
Segment reporting, disclosure of significant customers	The Company's relationship with DIRECTV® is based upon an agreement to provide installation and maintenance services for DIRECTV®. Revenue from DIRECTV® is included in the Communications segment.
Enbridge [Member] | Oil and Gas [Member]
Revenue, Significant Customer [Line Items]
Significant customer, percentage of consolidated revenue	14.00%	12.00%
Segment reporting, disclosure of significant customers	The Company's relationship with Enbridge, Inc. is based upon various construction contracts for natural gas pipelines. Revenue from Enbridge, Inc. is included in the Oil and Gas segment.

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Stock-Based Compensation and Other Employee Benefit Plans (Summary of Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended				3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2014
Outstanding Stock Options, Activity [Roll Forward]
Options outstanding, vested, beginning balance					495,571
Exercised					(200,900)
Canceled/forfeited					0
Options outstanding, vested, ending balance	294,671		495,571		294,671
Outstanding Stock Options, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, vested, beginning balance					$ 11.17
Exercised					$ 9.77
Canceled/forfeited					$ 0
Weighted average exercise price, vested, ending balance	$ 12.13		$ 11.17		$ 12.13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable	294,671				294,671
Options exercisable, weighted average exercise price	$ 12.13				$ 12.13
Options outstanding, vested, weighted average remaining contractual life	2 years 0 months 15 days		1 year 11 months 16 days
Options exercisable, weighted average remaining contractual life	2 years 0 months 15 days
Options outstanding, vested, aggregate intrinsic value	$ 9.2	[1]	$ 10.7	[1]	$ 9.2	[1]
Options exercisable, aggregate intrinsic value	$ 9.2	[1]			$ 9.2	[1]

[1] Amount represents the difference between the exercise price and the market price of the Company’s stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2014

Business Acquisition [Line Items]

Schedule of Business Acquisitions, Pro Forma Information

The unaudited supplemental pro forma financial information presented below has been prepared by adjusting the historical results of MasTec to include the historical results of the acquired businesses described above. The unaudited supplemental pro forma combined historical results were then adjusted (i) to remove one-time acquisition costs; (ii) to increase amortization expense resulting from the incremental intangible assets acquired in such acquisitions; (iii) to increase interest expense as a result of the cash consideration paid; and (iv) to reduce interest expense from the repayment of acquired debt. The unaudited supplemental pro forma financial information does not include any adjustments to reflect the impact of cost savings or other synergies that may result from these acquisitions. As noted above, the unaudited supplemental pro forma financial information does not purport to be indicative of the actual results that would have been achieved by the combined companies for the periods presented or that may be achieved by the combined companies in the future.

	For the Three Months Ended March 31,
	2014		2013
Pro forma financial information:	(unaudited, in millions)
Revenue	$	964.0	$	1,029.1
Net income from continuing operations	$	16.2	$	24.1

Results of Businesses Acquired

Revenues and net income resulting from the year over year incremental impact of acquired businesses, which are included within the Company's consolidated results of operations for the years indicated, are as follows (in millions):

	For the Three Months Ended March 31,
	2014		2013
Year over year impact of acquired businesses:	(unaudited, in millions)
Revenue	$	119.8	$	43.1
Net income from continuing operations	$	1.0	$	1.8

The above results do not include acquisition costs of $0.2 million and $0.4 million for the three month periods ended March 31, 2014 and March 31, 2013, respectively. The above results also do not include interest expense associated with consideration paid for these acquisitions.

2013 Acquisitions [Member]

Business Acquisition [Line Items]

Schedule of Business Acquisitions, Measurement Period Adjustments

Measurement period adjustments associated with the Company's 2013 acquisitions have been reflected in the Company's December 31, 2013 consolidated balance sheet as follows (in millions):

As of December 31, 2013	As Previously Reported		Measurement Period Adjustments		As Revised
Current assets	$	1,306.0	$	0.2	$	1,306.2
Goodwill	$	899.4	$	1.1	$	900.5
Current liabilities	$	825.5	$	1.2	$	826.7
Long-term deferred tax liabilities, net	$	154.9	$	0.1	$	155.0

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Equity (Schedule of Share Activity) (Details)	3 Months Ended
	Mar. 31, 2014
Rollforward of Share Activity
Common shares outstanding, beginning balance	77,258,000
Shares issued for stock option exercises	200,900
Shares issued for restricted stock awards	141,138
Common shares outstanding, ending balance	77,527,000
Treasury shares, beginning balance	9,467,286
Treasury shares, ending balance	9,467,286
Other Share Activity [Member]
Rollforward of Share Activity
Other shares issued, net of shares withheld for taxes	(73,000)

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Supplemental Guarantor Condensed Unaudited Consolidating Financial Information (Tables)

3 Months Ended

Mar. 31, 2014

Condensed Unaudited Financial Statements, Supplemental Guarantor Information [Abstract]

Condensed Unaudited Consolidating Statements Of Operations And Comprehensive Income

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	793.1		$	170.9		$	—		$	964.0
Costs of revenue, excluding depreciation and amortization	—			689.8			151.3			—			841.1
Depreciation and amortization	—			27.4			6.1			—			33.5
General and administrative expenses	0.6			47.3			5.4			—			53.3
Interest expense, net	—			11.7			0.3			—			12.0
Other (income) expense, net	—			(2.1		)	0.1			—			(2.0		)
(Loss) income from continuing operations before income taxes	$	(0.6	)	$	19.0		$	7.7		$	—		$	26.1
Benefit from (provision for) income taxes	0.2			(9.4		)	(0.7		)	—			(9.9		)
Net (loss) income from continuing operations	$	(0.4	)	$	9.6		$	7.0		$	—		$	16.2
Net loss from discontinued operations	—			—			(0.1		)	—			(0.1		)
Equity in income from subsidiaries, net of tax	16.4			—			—			(16.4		)	—
Net income (loss)	$	16.0		$	9.6		$	6.9		$	(16.4	)	$	16.1
Net income attributable to non-controlling interests	—			—			0.1			—			0.1
Net income (loss) attributable to MasTec, Inc.	$	16.0		$	9.6		$	6.8		$	(16.4	)	$	16.0
Comprehensive income (loss)	$	10.6		$	9.5		$	1.6		$	(11.0	)	$	10.7

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Revenue	$	—		$	843.1		$	77.2		$	(1.7	)	$	918.6
Costs of revenue, excluding depreciation and amortization	—			721.2			72.0			(1.7		)	791.5
Depreciation and amortization	—			28.9			2.9			—			31.8
General and administrative expenses	0.3			45.1			3.5			—			48.9
Interest expense, net	—			10.0			—			—			10.0
Loss on extinguishment of debt	—			5.6			—			—			5.6
Other income, net	—			(0.9		)	—			—			(0.9		)
(Loss) income from continuing operations before income taxes	$	(0.3	)	$	33.2		$	(1.2	)	$	—		$	31.7
Benefit from (provision for) income taxes	0.1			(13.0		)	0.5			—			(12.4		)
Net (loss) income from continuing operations	$	(0.2	)	$	20.2		$	(0.7	)	$	—		$	19.3
Net loss from discontinued operations	—			—			(0.9		)	—			(0.9		)
Equity in income from subsidiaries, net of tax	18.8			—			—			(18.8		)	—
Net income (loss)	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Net income attributable to non-controlling interests	—			—			0.0			—			0.0
Net income (loss) attributable to MasTec, Inc.	$	18.6		$	20.2		$	(1.6	)	$	(18.8	)	$	18.4
Comprehensive income (loss)	$	17.8		$	20.5		$	(2.5	)	$	(18.0	)	$	17.8

Condensed Unaudited Consolidating Balance Sheets

CONDENSED UNAUDITED CONSOLIDATING BALANCE SHEETS (in millions)

As of March 31, 2014	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,165.3	$	192.6		$	—		$	1,357.9
Property and equipment, net	—		435.9		73.7			—			509.6
Goodwill and other intangible assets, net	—		931.8		152.7			—			1,084.5
Net investments in and advances to (from) consolidated affiliates	1,022.5		173.9		(25.0		)	(1,171.4		)	—
Other long-term assets, including discontinued operations	9.3		36.9		15.2			—			61.4
Total assets	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4
Liabilities and Equity
Total current liabilities	$	—	$	735.7	$	84.7		$	—		$	820.4
Long-term debt	—		833.3		8.0			—			841.3
Other liabilities	—		236.7		78.2			—			314.9
Total liabilities	$	—	$	1,805.7	$	170.9		$	—		$	1,976.6
Total equity	$	1,031.8	$	938.1	$	238.3		$	(1,171.4	)	$	1,036.8
Total liabilities and equity	$	1,031.8	$	2,743.8	$	409.2		$	(1,171.4	)	$	3,013.4

As of December 31, 2013	MasTec, Inc.		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated MasTec, Inc.
Assets
Current assets, including discontinued operations	$	—	$	1,155.9	$	150.3		$	—		$	1,306.2
Property and equipment, net	—		420.2		67.9			—			488.1
Goodwill and other intangible assets, net	—		933.9		132.2			—			1,066.1
Net investments in and advances to (from) consolidated affiliates	1,006.8		172.4		(24.1		)	(1,155.1		)	—
Other long-term assets, including discontinued operations	9.3		36.2		15.1			—			60.6
Total assets	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0
Liabilities and Equity
Total current liabilities	$	—	$	773.3	$	53.4		$	—		$	826.7
Long-term debt	—		760.9		4.5			—			765.4
Other liabilities	—		236.7		71.1			—			307.8
Total liabilities	$	—	$	1,770.9	$	129.0		$	—		$	1,899.9
Total equity	$	1,016.1	$	947.7	$	212.4		$	(1,155.1	)	$	1,021.1
Total liabilities and equity	$	1,016.1	$	2,718.6	$	341.4		$	(1,155.1	)	$	2,921.0

Condensed Unaudited Consolidating Statements Of Cash Flows

CONDENSED UNAUDITED CONSOLIDATING STATEMENTS OF CASH FLOWS (in millions)

For the Three Months Ended March 31, 2014	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.3	)	$	15.2		$	(35.3	)	$	—	$	(20.4	)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(23.8		)	—			—		(23.8		)
Capital expenditures	—			(32.6		)	(3.0		)	—		(35.6		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Payments for other investments	—			(1.1		)	—			—		(1.1		)
Net cash used in investing activities	$	—		$	(54.1	)	$	(3.0	)	$	—	$	(57.1	)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	—			76.5			—			—		76.5
Repayments of other borrowings and capital lease obligations	—			(12.9		)	(0.9		)	—		(13.8		)
Excess tax benefits and net proceeds from stock-based awards	1.1			0.7			—			—		1.8
Payments of financing costs	—			(0.2		)	—			—		(0.2		)
Net financing activities and advances (to) from consolidated affiliates	(0.8		)	(24.7		)	25.5			—		—
Net cash provided by financing activities	$	0.3		$	39.4		$	24.6		$	—	$	64.3
Net increase (decrease) in cash and cash equivalents	—			0.5			(13.7		)	—		(13.2		)
Net effect of currency translation on cash	—			—			(0.5		)	—		(0.5		)
Cash and cash equivalents - beginning of period	—			5.3			17.7			—		23.0
Cash and cash equivalents - end of period	$	—		$	5.8		$	3.5		$	—	$	9.3
Cash and cash equivalents of discontinued operations	$	—		$	—		$	—		$	—	$	—
Cash and cash equivalents of continuing operations	$	—		$	5.8		$	3.5		$	—	$	9.3

For the Three Months Ended March 31, 2013	MasTec, Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated MasTec, Inc.
Net cash (used in) provided by operating activities	$	(0.6	)	$	50.3		$	(23.6	)	$	—	$	26.1
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired	—			(4.7		)	—			—		(4.7		)
Capital expenditures	—			(25.4		)	(0.4		)	—		(25.8		)
Proceeds from sale of property and equipment	—			3.4			—			—		3.4
Net cash used in investing activities	$	—		$	(26.7	)	$	(0.4	)	$	—	$	(27.1	)
Cash flows provided by (used in) financing activities:
(Repayments of) proceeds from credit facility	$	—		$	(134.0	)	$	—		$	—	$	(134.0	)
Proceeds from senior notes, net	—			250.0			—			—		250.0
Repayments of other borrowings and capital lease obligations	—			(19.1		)	—			—		(19.1		)
Excess tax benefits and net proceeds from stock-based awards	2.8			0.7			—			—		3.5
Payments of acquisition-related contingent consideration	—			(5.0		)	—			—		(5.0		)
Payments of financing costs, including call premiums on extinguishment of debt	—			(11.0		)	—			—		(11.0		)
Net financing activities and advances (to) from consolidated affiliates	(2.2		)	(12.9		)	15.1			—		—
Net cash provided by financing activities	$	0.6		$	68.7		$	15.1		$	—	$	84.4
Net increase (decrease) in cash and cash equivalents	—			92.3			(8.9		)	—		83.4
Net effect of currency translation on cash	—			(0.1		)	—			—		(0.1		)
Cash and cash equivalents - beginning of period	—			12.7			14.1			—		26.8
Cash and cash equivalents - end of period	$	—		$	104.9		$	5.2		$	—	$	110.1
Cash and cash equivalents of discontinued operations	$	—		$	—		$	0.9		$	—	$	0.9
Cash and cash equivalents of continuing operations	$	—		$	104.9		$	4.3		$	—	$	109.2

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Income Taxes

3 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company’s consolidated tax rates on income from continuing operations for the three month periods ended March 31, 2014 and 2013 were 38.0% and 39.0%, respectively. In determining the quarterly provision for income taxes, management uses an estimated annual effective tax rate based on forecasted annual pre-tax income, permanent tax differences, statutory tax rates and tax planning opportunities in the various jurisdictions in which the Company operates. The impact of significant discrete items is separately recognized in the quarter(s) in which they occur.

As of March 31, 2014, the Company had $12.7 million of current deferred tax assets, net, and $154.2 million of long-term deferred tax liabilities, net. As of December 31, 2013, current deferred tax assets, net, totaled $16.3 million and long-term deferred tax liabilities, net, totaled $155.0 million.