Accounts payable Accounts receivable, net Accrued Income Taxes, Current Accrued income taxes Long term income taxes payable Accrued compensation Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Accumulated other comprehensive income (loss) Compensation expense related to stock options Tax benefits from employee stock plans Adjustments to reconcile net income to net cash provided by operating activities: Amendment Flag Impairment of goodwill and intangibles Assets Assets, Total ASSETS Total current assets Total current assets Current assets: Business Combinations This element may be used to describe the nature of the entity's business and to describe all significant accounting policies of the reporting entity. Business and Summary of Significant Accounting Policies Cash and cash equivalents Cash and cash equivalents at end of fiscal year Cash and cash equivalents at beginning of fiscal year Net increase (decrease) in cash and cash equivalents Net increase (decrease) in cash and cash equivalents Supplemental non-cash investing activity: Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common stock and additional paid-in capital, $0.01 par value; 750.0 million shares authorized; 228.9 million shares outstanding at January 31, 2010 and 226.4 million shares outstanding at January 31, 2009 Common stock and additional paid-in capital Common stock, par value Common stock, shares authorized Common stock, shares outstanding Ending Balance (in shares) Beginning Balance (in shares) Deferred Compensation Comprehensive Income Comprehensive income (loss) Comprehensive income (loss) Comprehensive income: Comprehensive Income Note [Text Block] Comprehensive Income Total cost of revenue Total cost of revenue Cost of revenue: Cumulative effect of the adoption of FIN 48 Current Fiscal Year End Date Deferred Revenue, Current Deferred revenue Deferred Revenue, Noncurrent Deferred revenue Deferred income taxes Deferred income taxes, net Long term deferred income taxes Depreciation and amortization This item represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets). This element is a also used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Financial Instruments and Hedging Activities Employee and Director Stock Plans Document Information [Text Block] Document Period End Date Document Type Basic net income per share Diluted net income per share Net Income Per Share Effect of exchange rate changes on cash and cash equivalents Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity [Domain] Entity Filer Category Entity Public Float Entity Registrant Name Entity [Text Block] Entity Voluntary Filers Entity Well-known Seasoned Issuer Equity Component [Domain] Fair Value Measurements General and administrative Goodwill Gross Profit Gross profit Income before income taxes Income before income taxes Income Statement [Abstract] Income Taxes Net cash paid during the period for income taxes Provision for income taxes Provision for income taxes Accounts payable and accrued liabilities Accounts receivable Accounts receivable Increase (Decrease) in Accrued Income Taxes Payable Accrued income taxes Increase (Decrease) in Deferred Income Taxes Deferred income taxes Increase (Decrease) in Deferred Revenue Deferred revenue Changes in operating assets and liabilities, net of business combinations: Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepaid expenses and other current assets Purchased technologies, net Interest and other income (expense), net Legal Entity [Axis] Liabilities and Stockholders' Equity Liabilities and Stockholders' Equity, Total LIABILITIES AND STOCKHOLDERS' EQUITY Total current liabilities Total current liabilities Current liabilities: Cost of license and other revenue License and other Borrowings under line of credit Cost of maintenance revenue Maintenance Marketable Securities, Current Marketable securities Marketable Securities, Noncurrent Marketable securities Net cash used in financing activities Net cash used in financing activities Financing Activities Net cash used in investing activities Net cash used in investing activities Investing Activities Net cash provided by operating activities Net cash provided by operating activities Operating Activities Net income Net income Notes to Financial Statements [Abstract] Notes to Financial Statements [Abstract] Total operating expenses Total operating expenses Operating expenses: Income from operations Income from operations Other accrued liabilities Other assets Change in unfunded portion of pension plans Net gain (loss) on derivative instruments, net of tax Net change in cumulative foreign currency translation gain (loss) Other comprehensive income (loss) Other comprehensive income (loss) Other comprehensive income, net of tax: Change in net unrealized gain (loss) on marketable securities, net of tax Interest and Other Income, net Other liabilities Parent Company [Member] Repurchases of common stock Repurchases of common stock Business combinations, net of cash acquired Business combinations, net of cash acquired Purchase of equity investment Purchase of equity investment Purchases of marketable securities Purchases of marketable securities Capital expenditures Capital expenditures Retirement Benefit Plans Preferred stock, par value Preferred stock, shares authorized Preferred stock, issued Preferred stock, outstanding Preferred stock, $0.01 par value; 2.0 million shares authorized; none issued or outstanding at January 31, 2010 and 2009 Prepaid expenses and other current assets Proceeds from issuance of common stock, net of issuance costs Draws on line of credit Maturities of marketable securities Sales of marketable securities Computer equipment, software, furniture and leasehold improvements, net Selected Quarterly Financial Information (Unaudited) Repayments of line of credit Repayments of line of credit Research and development Charge for acquired in-process research and development Restructuring Reserves Restructuring Restructuring charges, net Retained Earnings (Accumulated Deficit) Retained earnings Retained earnings Total net revenue Total net revenue Net revenue: Borrowing Arrangements FINANCIAL STATEMENT SCHEDULE II Segments Marketing and sales Stock-based compensation expense Statement, Equity Components [Axis] Statement [Line Items] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Total stockholders' equity Ending Balance Beginning Balance Total stockholders' equity Stockholders' equity: Stockholders' Equity Common shares issued under stock award and stock purchase plans (in shares) Common shares issued under stock award and stock purchase plans Repurchase and retirement of common shares (in shares) Repurchase and retirement of common shares Repurchase and retirement of common shares Supplemental cash flow information: Supplemental change in goodwill and other accrued liabilities resulting from adjustments to purchase accounting estimates. Increase in goodwill and corresponding change in other accrued liabilities resulting from adjustments to purchase accounting estimates Represents compensation expense in excess of cash distributed in conjunction with a tender offer charged to additional paid in capital. Tender offer Tender offer Trading Symbol Shares used in computing diluted net income per share Shares used in computing basic net income per share