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Segment Information | 3 Months Ended
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Mar. 31, 2025
Segment Reporting [Abstract] |
Segment Information | 4. SEGMENT INFORMATION: Quanta’s operations are managed by senior executives who report to its Chief Executive Officer, the chief operating decision maker. The Chief Executive Officer uses operating income for each of Quanta’s reportable segments and considers forecast to actual variances to assess performance and when making decisions about allocating capital, craft skill labor and other resources. During the three months ending March 31, 2025, Quanta’s Chief Executive Officer reevaluated how performance of the business is assessed and how resources are allocated, which resulted in a change in the reporting of management’s internal financial information. As a result, beginning with the three months ended March 31, 2025, Quanta began reporting the results of its two operating segments, which are also its two reportable segments: (1) Electric Infrastructure Solutions (Electric) and (2) Underground Utility and Infrastructure Solutions (Underground and Infrastructure). The Electric segment consists of the historical Electric Power Infrastructure Solutions and the Renewable Energy Infrastructure Solutions segments. In conjunction with this change, certain prior period amounts have been recast to conform to this new segment reporting structure. Electric. Quanta’s Electric segment provides comprehensive services for the electric power, renewable energy, technology and communications markets. Services include, but are not limited to, the design, procurement, new construction, upgrade and repair and maintenance services for electric power transmission and distribution infrastructure, both overhead and underground, and substation facilities, along with other engineering and technical services, including services that support the implementation of upgrades by utilities to modernize and harden the electric power grid in order to ensure its safety and enhance reliability, to interconnect and transmit electricity from renewable energy generation and battery storage facilities and to accommodate increased residential and commercial use of electric vehicles. In addition, this segment provides engineering, procurement, new construction, repowering and repair and maintenance services for renewable generation facilities, such as utility-scale wind, solar and hydropower generation facilities and battery storage facilities, as well as emergency restoration services, including the repair of infrastructure damaged by fire and inclement weather and the installation of “smart grid” technologies on electric power networks. This segment also provides comprehensive design and construction solutions to wireline and wireless communications companies; electrical systems for technology, commercial and industrial facilities and other load centers, commercial and industrial facilities; and cable multi-system operators and other customers within the communications industry, as well as other related services. Additionally, this segment manufactures power transformers and components for the electric utility, renewable energy, municipal power and industrial markets. Underground and Infrastructure. Quanta’s Underground and Infrastructure segment provides comprehensive infrastructure solutions to customers involved in the transportation, distribution, storage, development and processing of natural gas, oil and other products. Services include, but are not limited to design, engineering, procurement, new construction, upgrade and repair and maintenance services for natural gas systems for gas utility customers; pipeline construction, protection, integrity testing, rehabilitation and replacement services; and civil solutions. Additionally, Quanta serves the midstream and downstream industrial energy markets through catalyst replacement services, high-pressure and critical-path turnaround services, instrumentation and electrical services, piping, fabrication and storage tank services. Quanta’s segment results are derived from the types of services provided across its operating companies in each of its end user markets. Quanta’s entrepreneurial business model allows multiple operating companies to serve the same or similar customers and to provide a range of services across end user markets. Reportable segment information, including revenues and operating income by type of work, is gathered from each operating company. Classification of operating company revenues by type of work for segment reporting purposes can require judgment on the part of management. Segment operating expenses (excluding depreciation expense) primarily includes cost of services, such as wages and benefits; subcontractor costs; materials; certain equipment rental and maintenance costs, and other direct and indirect project costs, as well as allocated segment selling, general and administrative expenses. Integrated operations and common administrative support for Quanta’s operating companies require that allocations be made to determine segment profitability, including allocations of certain corporate shared and indirect operating costs as well as general and administrative costs. Separate measures of Quanta’s assets and cash flows by reportable segment, including capital expenditures, are not produced or utilized by the Chief Executive Officer to evaluate segment performance since certain of Quanta’s fixed assets are used on an interchangeable basis across its reportable segments. As such, for reporting purposes, total depreciation expense is determined quarterly by allocating depreciation expense at each legal entity to Quanta’s reportable segments based on the ratio of each legal entity’s revenue contribution to each of Quanta’s segments. Corporate and non-allocated costs include corporate facility costs; non-allocated corporate salaries, benefits and incentive compensation; acquisition and integration costs; non-cash stock-based compensation; amortization related to intangible assets; asset impairment related to goodwill and intangible assets; and change in fair value of contingent consideration liabilities. The following table shows segment financial information in thousands of dollars for the periods presented. All revenues are from external customers. Segment operating margin is calculated by dividing operating income by revenues.
Three Months Ended March 31, 2025 |  | Electric |  | Underground and Infrastructure (1) |  | Total
Revenues |  | $ | 4,944,391 |  |  | $ | 1,288,943 |  |  | $ | 6,233,334 |
Segment operating expense (excluding segment depreciation expense) |  | 4,482,845 |  |  | 1,186,007 |  |  | 5,668,852 |
Segment depreciation expense |  | 66,311 |  |  | 26,069 |  |  | 92,380 |
Segment operating expenses |  | 4,549,156 |  |  | 1,212,076 |  |  | 5,761,232 |
Equity in earnings on integral unconsolidated affiliates |  | 12,929 |  |  | — |  |  | 12,929 |
Segment operating income |  | $ | 408,164 |  |  | $ | 76,867 |  |  | $ | 485,031 |
Segment operating margin |  | 8.3 | % |  | 6.0 | % |  |
Corporate and non-allocated costs (2) |  |  |  |  |  | (245,950) |
Total consolidated operating income |  |  |  |  |  | $ | 239,081 |
Three Months Ended March 31, 2024 |  | Electric |  | Underground and Infrastructure (3) |  | Total
Revenues |  | $ | 3,911,124 |  |  | $ | 1,120,695 |  |  | $ | 5,031,819 |
Segment operating expense (excluding segment depreciation expense) |  | 3,562,345 |  |  | 1,048,821 |  |  | 4,611,166 |
Segment depreciation expense |  | 58,242 |  |  | 24,986 |  |  | 83,228 |
Segment operating expenses |  | 3,620,587 |  |  | 1,073,807 |  |  | 4,694,394 |
Equity in earnings on integral unconsolidated affiliates |  | 12,334 |  |  | — |  |  | 12,334 |
Segment operating income |  | $ | 302,871 |  |  | $ | 46,888 |  |  | $ | 349,759 |
Segment operating margin |  | 7.7 | % |  | 4.2 | % |  |
Corporate and non-allocated costs (2) |  |  |  |  |  | (194,405) |
Total consolidated operating income |  |  |  |  |  | $ | 155,354 |
(1) Included in operating expenses (excluding segment depreciation expense) for the Underground and Infrastructure segment during the three months ended March 31, 2025 was $4.2 million that, pursuant to an acquisition purchase agreement, was withheld from the sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations. (2) Corporate and non-allocated costs included amortization expense of $109.6 million and $77.5 million and non-cash stock-based compensation of $38.2 million and $35.3 million for the three months ended March 31, 2025 and 2024. (3) Included in operating expenses (excluding segment depreciation expense) for the Underground and Infrastructure segment during the three months ended March 31, 2024 was a loss of $10.7 million related to the disposition of a non-core business.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards 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