| **Description Of Business And Basis Of Presentation (Policies)** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| **Accounting Policies [Abstract]**                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     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| Impact of recently issued accounting standards                   | Impact of Recently Issued Accounting StandardsIn May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), (the “New Revenue Standard”), which will replace existing guidance under U.S. GAAP, including industry-specific requirements, and will provide companies with a single principles-based revenue recognition model for recognizing revenue from contracts with customers.  The core principle of the New Revenue Standard is that a company should recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. In addition, the FASB has issued several amendments to the New Revenue Standard, including principal versus agent considerations, clarifications on identification of performance obligations, and accounting for licenses of intellectual property. The amendments are intended to address implementation issues that were raised by stakeholders and provide additional practical expedients to reduce the cost and complexity of adoption.The New Revenue Standard is effective for us beginning in the first quarter of fiscal year 2019 and permits the use of either the full retrospective or modified retrospective transition methods. We anticipate adopting the New Revenue Standard on April 1, 2018 using the modified retrospective method, which recognizes the cumulative effect of initially applying the New Revenue Standard as an adjustment to retained earnings at the adoption date. The New Revenue Standard will have a significant impact on our Condensed Consolidated Financial Statements and related disclosures as it relates to the accounting for substantially all of our transactions with multiple elements or “bundled” arrangements. For example, for sales of online-enabled games, as currently reported we do not have vendor-specific objective evidence of fair value (“VSOE”) for unspecified future updates, and thus, revenue from the entire sales price is recognized ratably over the estimated offering period. However, under the New Revenue Standard, the VSOE requirement for undelivered elements is eliminated, allowing us to essentially “break-apart” our online-enabled games and account for the various promised goods or services identified as separate performance obligations. For example, for the sale of an online-enabled game, we usually have multiple distinct performance obligations such as software, future update rights, and an online service. The software performance obligation represents the initial game delivered digitally or via physical disc. The future update rights performance obligation may include software patches or updates, maintenance, and/or additional free content to be delivered in the future. And lastly, the online service performance obligation consists of providing the customer with a service of online activities (e.g., online playability). Under current software revenue recognition rules, we recognize as revenue the entire sales price over the estimated offering period. However, under the New Revenue Standard, we will recognize a portion of the sales price as revenue upon delivery of the software performance obligation with the future update rights and online services portions recognized ratably over the estimated offering period. In addition, both portions of sales price allocated to future update rights and online services will be classified as a service revenue under the New Revenue Standard (currently, future update rights are generally presented as product revenue). Therefore, upon adoption, an increased portion of our sales from online-enabled games will be presented as service revenue than is currently reported today. Also, upon adoption of the New Revenue Standard, we will present our sales returns and price protection reserves as liabilities (currently, sales returns and price protection reserves are classified as contra-assets within receivables on our Condensed Consolidated Balance Sheets).In January 2016, the FASB issued ASU 2016-01, Financial Instruments (Topic 825-10), which requires that most equity investments be measured at fair value, with subsequent changes in fair value recognized in net income. The ASU also impacts financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments.The requirements will be effective for us beginning in the first quarter of fiscal year 2019. We are currently evaluating the impact of this new standard on our Condensed Consolidated Financial Statements and related disclosures. In March 2016, the FASB issued ASU 2016-04, Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products. The amendments in the ASU are designed to provide guidance and eliminate diversity in the accounting for derecognition of prepaid stored-value product liabilities. Typically, a prepaid stored-value product liability is to be derecognized when it is probable that a significant reversal of the recognized breakage amount will not subsequently occur. This is when the likelihood of the product holder exercising its remaining rights becomes remote. This estimate shall be updated at the end of each period. The amendments in this ASU are effective for us beginning in the first quarter of fiscal year 2019. Early adoption is permitted. We do not expect the adoption to have a material impact on our Condensed Consolidated Financial Statements.In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This update is intended to reduce the existing diversity in practice in how certain transactions are classified in the statement of cash flows. This update is effective for us beginning in the first quarter of fiscal year 2019. Early adoption is permitted, provided that all of the amendments are adopted in the same period. We do not expect the adoption to have a material impact on our Condensed Consolidated Financial Statements.In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force), which requires amounts generally described as restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown in the statement of cash flows. This update is effective for us beginning in the first quarter of fiscal year 2019. Early adoption is permitted. We do not expect the adoption to have a material impact on our Condensed Consolidated Financial Statements.In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The FASB issued this standard to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The updated guidance is effective for us beginning in the first quarter of fiscal year 2020. Early adoption is permitted. We are currently evaluating the timing of adoption and impact of this new standard on our Condensed Consolidated Financial Statements and related disclosures.In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326). The standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. ASU 2016-13 is effective for us beginning in the first quarter of fiscal year 2021. Early adoption is permitted beginning in the first quarter of fiscal year 2020. We are currently evaluating the timing of adoption and impact of this new standard on our Condensed Consolidated Financial Statements and related disclosures.In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350). The standard simplifies the goodwill impairment test. This update removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This update is effective for us beginning in the first quarter of fiscal year 2021. Early adoption is permitted for any impairment tests performed after January 1, 2017. We anticipate early adopting ASU 2017-04 during the fourth quarter of fiscal year 2018. We do not expect the adoption to have a material impact on our Condensed Consolidated Financial Statements. |

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| - References
No definition available.
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| - Definition
The entire disclosure for a new accounting pronouncement that has been issued but not yet adopted.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 11.M) -URI http://asc.fasb.org/extlink&oid=26874127&loc=d3e31137-122693
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