Description of Business and Significant Accounting Policies	3 Months Ended
Jun. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Significant Accounting Policies	Description of Business and Significant Accounting Policies Business Symantec Corporation (“Symantec,” the “Company,” “we,” “us,” and “our” refer to Symantec Corporation and all of its subsidiaries) is a global leader in cybersecurity. We provide security products, services and solutions to organizations and individuals. Our Integrated Cyber Defense Platform helps enterprise, business and government customers unify cloud and on-premises security to protect against threats and safeguard information across every control point and attack vector. Our Cyber Safety Solutions (delivered through our Norton and LifeLock offerings) help consumers protect their information, identities, devices and networks at home and online. Basis of presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the United States of America (“U.S.”) for interim financial information. In the opinion of management, the unaudited Condensed Consolidated Financial Statements contain all adjustments, consisting only of normal recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations, and cash flows for the interim periods. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and accompanying Notes thereto included in our Annual Report on Form 10-K for the fiscal year ended March 30, 2018. The results of operations for the three months ended June 29, 2018, are not necessarily indicative of the results expected for the entire fiscal year. We have a 52/53-week fiscal year ending on the Friday closest to March 31. Unless otherwise stated, references to three-month periods in this report relate to fiscal periods ended June 29, 2018 and June 30, 2017, each consisting of 13 weeks. Our 2019 fiscal year consists of 52 weeks and ends on March 29, 2019. Use of estimates The preparation of Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Such estimates include, but are not limited to, the determination of revenue recognition, valuation of goodwill, intangible assets and long-lived assets, income taxes, valuation of stock-based awards and recognition of stock-based compensation expense, and loss contingencies. Management determines these estimates and assumptions based on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ significantly from these estimates, and such differences may be material to the Condensed Consolidated Financial Statements. Significant accounting policies There have been no material changes to our significant accounting policies as of and for the three months ended June 29, 2018, except for those noted in Note 2 and Note 3, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended March 30, 2018.

Description of Business and Significant Accounting Policies

Business

Symantec Corporation (“Symantec,” the “Company,” “we,” “us,” and “our” refer to Symantec Corporation and all of its subsidiaries) is a global leader in cybersecurity. We provide security products, services and solutions to organizations and individuals. Our Integrated Cyber Defense Platform helps enterprise, business and government customers unify cloud and on-premises security to protect against threats and safeguard information across every control point and attack vector. Our Cyber Safety Solutions (delivered through our Norton and LifeLock offerings) help consumers protect their information, identities, devices and networks at home and online.

Basis of presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the United States of America (“U.S.”) for interim financial information. In the opinion of management, the unaudited Condensed Consolidated Financial Statements contain all adjustments, consisting only of normal recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations, and cash flows for the interim periods. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and accompanying Notes thereto included in our Annual Report on Form 10-K for the fiscal year ended March 30, 2018. The results of operations for the three months ended June 29, 2018, are not necessarily indicative of the results expected for the entire fiscal year.

We have a 52/53-week fiscal year ending on the Friday closest to March 31. Unless otherwise stated, references to three-month periods in this report relate to fiscal periods ended June 29, 2018 and June 30, 2017, each consisting of 13 weeks. Our 2019 fiscal year consists of 52 weeks and ends on March 29, 2019.

Use of estimates

The preparation of Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Such estimates include, but are not limited to, the determination of revenue recognition, valuation of goodwill, intangible assets and long-lived assets, income taxes, valuation of stock-based awards and recognition of stock-based compensation expense, and loss contingencies. Management determines these estimates and assumptions based on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ significantly from these estimates, and such differences may be material to the Condensed Consolidated Financial Statements.

Significant accounting policies

There have been no material changes to our significant accounting policies as of and for the three months ended June 29, 2018, except for those noted in Note 2 and Note 3, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended March 30, 2018.