Overview and Basis of Presentation	3 Months Ended
Apr. 30, 2018
Accounting Policies [Abstract]
Overview and Basis of Presentation	Overview and Basis of Presentation Company and Background Workday provides financial management, human capital management, and analytics applications designed for the world's largest companies, educational institutions, and government agencies. We offer innovative and adaptable technology focused on the consumer internet experience and cloud delivery model. Our applications are designed for global enterprises to manage complex and dynamic operating environments. We provide our customers highly adaptable, accessible, and reliable applications to manage critical business functions that enable them to optimize their financial and human capital resources. We were originally incorporated in March 2005 in Nevada and in June 2012, we reincorporated in Delaware. As used in this report, the terms "Workday," "registrant," "we," "us," and "our" mean Workday, Inc. and its subsidiaries unless the context indicates otherwise. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. The condensed consolidated financial statements include the results of Workday, Inc. and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of our management, the information contained herein reflects all adjustments necessary for a fair presentation of Workday’s results of operations, financial position, and cash flows. All such adjustments are of a normal, recurring nature. The results of operations for the quarter ended April 30, 2018 shown in this report are not necessarily indicative of results to be expected for the full year ending January 31, 2019. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements in our Annual Report on Form 10-K for the year ended January 31, 2018, filed with the SEC on March 14, 2018. Certain prior period amounts reported in our condensed consolidated financial statements have been reclassified to conform to current period presentation. Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires us to make certain estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements as well as the reported amounts of revenues and expenses during the reporting period. These estimates include, but are not limited to, the determination of the period of benefit for deferred commissions, certain assumptions used in the valuation of equity awards, and the fair value of assets acquired and liabilities assumed through business combinations. Actual results could differ from those estimates and such differences could be material to our condensed consolidated financial position and results of operations. Segment Information We operate in one operating segment, cloud applications. Operating segments are defined as components of an enterprise where separate financial information is evaluated regularly by the chief operating decision maker, who is our chief executive officer, in deciding how to allocate resources and assessing performance. Our chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level.

Overview and Basis of Presentation

Company and Background

Workday provides financial management, human capital management, and analytics applications designed for the world's largest companies, educational institutions, and government agencies. We offer innovative and adaptable technology focused on the consumer internet experience and cloud delivery model. Our applications are designed for global enterprises to manage complex and dynamic operating environments. We provide our customers highly adaptable, accessible, and reliable applications to manage critical business functions that enable them to optimize their financial and human capital resources. We were originally incorporated in March 2005 in Nevada and in June 2012, we reincorporated in Delaware. As used in this report, the terms "Workday," "registrant," "we," "us," and "our" mean Workday, Inc. and its subsidiaries unless the context indicates otherwise.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. The condensed consolidated financial statements include the results of Workday, Inc. and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of our management, the information contained herein reflects all adjustments necessary for a fair presentation of Workday’s results of operations, financial position, and cash flows. All such adjustments are of a normal, recurring nature. The results of operations for the quarter ended April 30, 2018 shown in this report are not necessarily indicative of results to be expected for the full year ending January 31, 2019. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements in our Annual Report on Form 10-K for the year ended January 31, 2018, filed with the SEC on March 14, 2018.

Certain prior period amounts reported in our condensed consolidated financial statements have been reclassified to conform to current period presentation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires us to make certain estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements as well as the reported amounts of revenues and expenses during the reporting period. These estimates include, but are not limited to, the determination of the period of benefit for deferred commissions, certain assumptions used in the valuation of equity awards, and the fair value of assets acquired and liabilities assumed through business combinations. Actual results could differ from those estimates and such differences could be material to our condensed consolidated financial position and results of operations.

Segment Information

We operate in one operating segment, cloud applications. Operating segments are defined as components of an enterprise where separate financial information is evaluated regularly by the chief operating decision maker, who is our chief executive officer, in deciding how to allocate resources and assessing performance. Our chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level.