Description of the Business and Basis of Presentation (Policies)	3 Months Ended
	Apr. 29, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Year	Fiscal Year The Company’s fiscal year is the 52- or 53-week period ending on the Friday closest to January 31. The Company refers to the fiscal year ending February 3, 2017 and the fiscal year ended January 29, 2016 as fiscal 2017 and fiscal 2016, respectively. Fiscal 2017 includes 53 weeks and fiscal 2016 included 52 weeks.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Estimates are revised as additional information becomes available. In the Condensed Consolidated Statements of Operations, estimates are used when accounting for revenue arrangements, determining cost of revenue, allocating cost in the form of depreciation and amortization and estimating the impact of contingencies. In the Statements of Financial Position, estimates are used in determining the valuation and recoverability of assets, such as accounts receivables, inventories, fixed assets, goodwill and other identifiable intangible assets, and estimates are used in determining the reported amounts of liabilities, such as taxes payable and the impact of contingencies, all of which also impact the Condensed Consolidated Statements of Operations. Actual results could differ from these estimates.
Stock-Based Compensation Policy	Stock-Based Compensation Policy In connection with the Company's IPO, its board of directors adopted the SecureWorks Corp. 2016 Long-Term Incentive Plan (the "2016 Plan"). The 2016 Plan became effective on April 18, 2016. The Company’s compensation programs also include grants under Dell’s share-based payment plans for two of the Company's named executive officers. Compensation expense related to these stock-based transactions was measured and recognized in the financial statements based on fair value. In general, the fair value of each option award was estimated on the grant date using the Black-Scholes option-pricing model. This model requires that at the date of grant the Company determine the fair value of the underlying common stock, the expected term of the award, the expected volatility of the stock price, risk-free interest rates, and the expected dividend yield. For more information regarding the Company's stock-based compensation programs see "Note 6—Stock-based Compensation."
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Revenue from Contracts with Customers — In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update ("ASU") No. 2014-09, “Revenue from Contracts with Customers.” The update gives entities a single comprehensive model to use in reporting information about the amount and timing of revenue resulting from contracts to provide goods or services to customers. The proposed ASU, which would apply to any entity that enters into contracts to provide goods or services, would supersede the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. In April 2016, the FASB issued ASU No. 2016-10, “Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing.” The update clarifies aspects of ASU 2014-09 pertaining to the identification of performance obligations and the licensing implementation guidance, while retaining the related principles for those areas. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal Versus Agent Considerations (Reporting Revenue Gross versus Net).” The update clarifies the principal-versus-agent implementation guidance in ASU 2014-09, which will impact whether an entity reports revenue on a gross or net basis. These updates are effective for the Company beginning in the first quarter of the fiscal year ending February 1, 2019. The Company is currently evaluating the impact of these updates on its consolidated financial statements. Compensation - Stock Compensation—In March 2016, the FASB issued ASU No. 2016-09, “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Accounting.” The update simplifies the income tax accounting and cash flow presentation related to share-based compensation by requiring the recognition of all excess tax benefits and deficiencies directly on the income statement and classification as cash flows from operating activities on the statement of cash flows. This update also makes several changes to the accounting for forfeitures and employee tax withholding on share-based compensation. The update is effective for the Company for annual and interim periods beginning after December 15, 2016, and early adoption is permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. Leases — In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” which requires lessees to recognize most lease liabilities on their balance sheets but recognize the expenses on their income statements in a manner similar to current practice. The update states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The update is effective for the Company for annual and interim periods beginning after December 15, 2018, and early adoption is permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. Balance Sheet Classifications of Deferred Taxes — In November 2015, the FASB issued an amendment to its accounting guidance related to balance sheet classification of deferred taxes in ASU 2015-17, “Income Taxes (Topic 740).” The amendment requires that deferred tax assets and liabilities be classified as noncurrent in the statement of financial position. The Company elected to early adopt this standard in the fourth quarter of fiscal 2016 on a prospective basis. Other than the reclassification of deferred tax amounts in the Condensed Consolidated Statements of Financial Position as of January 29, 2016, the amendment had no impact on the Company’s Condensed Consolidated Statements of Financial Position. Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern — In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements — Going concern (Subtopic 205-40).” The update requires companies to evaluate at each reporting period whether there are conditions or events that raise substantial doubt about the company’s ability to continue as a going concern within one year after the financial statements are issued. Additional disclosures will be required if management concludes that substantial doubt exists. This guidance is effective for the Company beginning in the first quarter of the fiscal year ending February 2, 2018. The Company does not expect this new guidance to impact its consolidated financial statements.