Significant Accounting Policies and Estimates (Policies)	9 Months Ended
Oct. 29, 2022
Accounting Policies [Abstract]
Basis of Presentation	Dycom Industries, Inc. (“Dycom”, the “Company”, “we”, “our”, or “us”) is a leading provider of specialty contracting services throughout the United States. These services include program management; planning; engineering and design; aerial, underground, and wireless construction; maintenance; and fulfillment services for telecommunications providers. Additionally, Dycom provides underground facility locating services for various utilities, including telecommunications providers, and other construction and maintenance services for electric and gas utilities. Dycom supplies the labor, tools, and equipment necessary to provide these services to its customers.
Accounting Period	The Company uses a 52/53 week fiscal year ending on the last Saturday in January. Fiscal 2022 and fiscal 2023 each consist of 52 weeks of operations. The next 53 week fiscal period will occur in the fiscal year ending January 31, 2026.
Segment Information	Segment Information. The Company operates in one reportable segment. Its services are provided by its operating segments on a decentralized basis. Each operating segment consists of a subsidiary (or in certain instances, the combination of two or more subsidiaries), the results of which are regularly reviewed by the Company’s Chief Executive Officer, the chief operating decision maker. All of the Company’s operating segments have been aggregated into one reportable segment based on their similar economic characteristics, nature of services and production processes, type of customers, and service distribution methods. The United States continues to be impacted by a pandemic caused by a novel strain of coronavirus, including variants of the coronavirus (“COVID-19”). The response to COVID-19 by businesses and governmental agencies, and the ongoing impacts of COVID-19 on global supply chains continues to affect the economy. As the COVID-19 pandemic continues to evolve, we are closely monitoring its impact on all aspects of our business, including how it impacts our customers, subcontractors, suppliers, vendors and employees, in addition to its impact on our ability to provide services to our customers. We believe the full extent of the impact of the COVID-19 pandemic on the Company's operating results, cash flow and financial condition will be determined by factors which are uncertain, unpredictable and outside of our control, including the duration and severity of the pandemic, any worsening of the pandemic, the effectiveness of vaccinations or prior infection to protect against infection or a subsequent infection, the severity of impacts to the health of infected persons, the nature and duration of the containment and mitigation actions taken by federal, state and local governments and protocols and contractual requirements implemented by our customers, and the resulting impact on the demand for our services from our customers. In addition, the ability of our employees and our suppliers’ and customers’ employees to work may be significantly impacted by individuals contracting or being exposed to COVID-19, or as a result of the control measures noted above. Our customers may be directly impacted by business curtailments or weak market conditions and may not be willing to continue using the services we provide. Furthermore, the COVID-19 pandemic may cause delays in our provision of services due to interruptions or restrictions in our ability to obtain permits from government agencies and as a result of constraints to the availability of labor, supplies and equipment. The situation surrounding COVID-19 remains fluid, and if disruptions do arise, they could materially adversely impact our business.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. These estimates are based on our historical experience and management’s understanding of current facts and circumstances. At the time they are made, we believe that such estimates are fair when considered in conjunction with the Company’s consolidated financial position and results of operations taken as a whole. However, actual results could differ materially from those estimates.
Recently Issued Accounting Pronouncements	Accounting Standards Not Yet Adopted All other new accounting pronouncements that have been issued but not yet effective are currently being evaluated and at this time are not expected to have a material impact on our financial position or results of operations.

Significant Accounting Policies and Estimates (Policies)

9 Months Ended

Oct. 29, 2022

Dycom Industries, Inc. (“Dycom”, the “Company”, “we”, “our”, or “us”) is a leading provider of specialty contracting services throughout the United States. These services include program management; planning; engineering and design; aerial, underground, and wireless construction; maintenance; and fulfillment services for telecommunications providers. Additionally, Dycom provides underground facility locating services for various utilities, including telecommunications providers, and other construction and maintenance services for electric and gas utilities. Dycom supplies the labor, tools, and equipment necessary to provide these services to its customers.

Accounting Period

The Company uses a 52/53 week fiscal year ending on the last Saturday in January. Fiscal 2022 and fiscal 2023 each consist of 52 weeks of operations. The next 53 week fiscal period will occur in the fiscal year ending January 31, 2026.

Segment Information

Segment Information. The Company operates in one reportable segment. Its services are provided by its operating segments on a decentralized basis. Each operating segment consists of a subsidiary (or in certain instances, the combination of two or more subsidiaries), the results of which are regularly reviewed by the Company’s Chief Executive Officer, the chief operating decision maker. All of the Company’s operating segments have been aggregated into one reportable segment based on their similar economic characteristics, nature of services and production processes, type of customers, and service distribution methods. The United States continues to be impacted by a pandemic caused by a novel strain of coronavirus, including variants of the coronavirus (“COVID-19”). The response to COVID-19 by businesses and governmental agencies, and the ongoing impacts of COVID-19 on global supply chains continues to affect the economy. As the COVID-19 pandemic continues to evolve, we are closely monitoring its impact on all aspects of our business, including how it impacts our customers, subcontractors, suppliers, vendors and employees, in addition to its impact on our ability to provide services to our customers. We believe the full extent of the impact of the COVID-19 pandemic on the Company's operating results, cash flow and financial condition will be determined by factors which are uncertain, unpredictable and outside of our control, including the duration and severity of the pandemic, any worsening of the pandemic, the effectiveness of vaccinations or prior infection to protect against infection or a subsequent infection, the severity of impacts to the health of infected persons, the nature and duration of the containment and mitigation actions taken by federal, state and local governments and protocols and contractual requirements implemented by our customers, and the resulting impact on the demand for our services from our customers. In addition, the ability of our employees and our suppliers’ and customers’ employees to work may be significantly impacted by individuals contracting or being exposed to COVID-19, or as a result of the control measures noted above. Our customers may be directly impacted by business curtailments or weak market conditions and may not be willing to continue using the services we provide. Furthermore, the COVID-19 pandemic may cause delays in our provision of services due to interruptions or restrictions in our ability to obtain permits from government agencies and as a result of constraints to the availability of labor, supplies and equipment. The situation surrounding COVID-19 remains fluid, and if disruptions do arise, they could materially adversely impact our business.

Use of Estimates

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. These estimates are based on our historical experience and management’s understanding of current facts and circumstances. At the time they are made, we believe that such estimates are fair when considered in conjunction with the Company’s consolidated financial position and results of operations taken as a whole. However, actual results could differ materially from those estimates.

Recently Issued Accounting Pronouncements

Accounting Standards Not Yet Adopted

All other new accounting pronouncements that have been issued but not yet effective are currently being evaluated and at this time are not expected to have a material impact on our financial position or results of operations.