Income Statement [Abstract] Net sales Cost of sales Gross profit Research and development Sales, general and administrative Restructuring charges Operating loss Interest income and other, net Interest expense Gain on acquisition of Microcontroller and Analog business Gain on acquisition of Microcontroller and Analog business Loss before income taxes Provision (benefit) for income taxes Income tax expense (benefit) Income Tax Expense (Benefit) Net loss Net loss Net loss (in Dollars) Basic (in Dollars per share) Diluted (in Dollars per share) Basic (in Shares) Diluted (in Shares) Statement of Comprehensive Income [Abstract] Unrealized gain on recovery from impaired investments reclassified into earnings Net foreign currency translation gain (loss) Net unrealized hedge gain (loss) arising during the period Net gain reclassified into earnings for revenue hedges (ineffective portion) Net gain reclassified from accumulated OCI into income (ineffective portion) (2) Hedging Relationship [Axis] Revenue Hedges [Member] Net loss (gain) reclassified into earnings for revenue hedges (effective portion) Net loss reclassified into earnings for expense hedges Expense Hedges [Member] Net unrealized gain (loss) on cash flow hedges Other comprehensive income (loss), net of tax Net other comprehensive income Total comprehensive loss Statement of Financial Position [Abstract] Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and cash equivalents Short-term investments Short-term investments Accounts receivable, net Account receivable, net Inventories Inventories Deferred income taxes Prepaid expenses and other current assets Total current assets Property, plant and equipment, net Property, plant and equipment, net Intangible assets, net Goodwill Other assets Total assets Accounts payable Accrued compensation and benefits Accrued liabilities and other Income taxes payable Deferred income Current portion of long-term debt Less: current portion Total current liabilities Deferred income taxes Long-term debt, less current portion Long-term debt Other long-term liabilities Other long term liabilities Total liabilities Class of Stock [Axis] Common Class A [Member] Common stock Common stock par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Common Class B [Member] Preferred stock par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Additional paid-in capital Accumulated deficit Accumulated other comprehensive loss (Note 5) Beginning Balance, December 29, 2013 Ending Balance, September 28, 2014 Total stockholders' equity Total liabilities and stockholders' equity Statement of Cash Flows [Abstract] Depreciation and amortization Gain on liquidation of auction rate securities Gain on recovery of impaired investments Benefit for deferred income taxes Gain on pension assets Net gain on sale and disposal of property, plant and equipment Costs relating to partial repurchase of 7.875% Senior Notes Compensation recognized under employee stock plans Reserve reversal on final settlement of bankruptcy claims Gain (Loss) on Bankruptcy Related Reserve on Final Settlement Changes in assets and liabilities Net cash provided by operating activities Proceeds from liquidation of auction rate securities Proceeds from recovery of impaired investments Proceeds from sale of property, plant and equipment Purchases of property, plant and equipment Proceeds from sales and maturities of marketable securities Purchases of marketable securities Acquisition of Microcontroller and Analog business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Net cash used for investing activities Proceeds from issuance of common stock due to options exercised Refinancing cost on Term Loan and Revolver Payments on financing arrangements Proceeds from issuance of 2.00% Senior Exchangeable Notes Costs relating to issuance of 2.00% Senior Exchangeable Notes Purchase of capped call for the 2.00% Senior Exchangeable Notes Partial repurchase of 7.875% Senior Notes including costs Net proceeds from sale of Sunnyvale property Sale Leaseback Transaction, Net Proceeds, Financing Activities Cash settlement on hedging activities Net cash provided by (used for) financing activities Effect of exchange rate changes on cash and cash equivalents Net decrease in cash and cash equivalents Liabilities recorded for purchases of property, plant and equipment Unpaid issuance costs relating to the 2.00% Senior Exchangeable Notes Restricted cash relating to employee compensation and benefits received from FSL Disclosure Text Block [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Business Combinations [Abstract] Pro Forma Consolidated Results of Operations [Abstract] Disclosure Text Block Supplement [Abstract] Balance Sheet Components [Abstract] Cash Money market funds Schedule of Fair Value of Separate Accounts by Major Category of Investment [Axis] Cash and Cash Equivalents [Member] FDIC insured certificates of deposit Time deposits Short-term Investments [Member] Accounts receivable, gross Allowance for doubtful accounts Raw materials Work-in-process Finished goods Land Buildings and leasehold improvements Equipment Construction in progress Accumulated depreciation and amortization Accrued vacation MCA business employees pension related obligation Others Accrued compensation and benefits Short term license liability Obligation recorded from sale of Sunnyvale property Litigation reserve Others Accrued liabilities and other MCA business employees pension related obligation Others Equity [Abstract] Accumulated Other Comprehensive Loss, Net of Tax [Abstract] Other comprehensive income before reclassification, net of tax Amounts reclassified to earnings on cash flow hedges Equity Components [Axis] Accumulated Translation Adjustment [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Shares Available for Grant [Abstract] Balance as of December 29, 2013 Balance as of September 28, 2014 Additional shares issuable under 2010 plan (annual increase for 2014) Stock options forfeited/cancelled through September 28, 2014 Award Type [Axis] Restricted Stock Units (RSUs) [Member] Awards other than options granted, net of forfeitures/cancellations Granted Key Executive Rsu [Member] Performance Stock Units [Member] Plan Name [Axis] Two Thousand Ten Equity Incentive Award Plan [Member] Total Recorded Stock-based Compensation Expense [Abstract] Income Statement Location [Axis] Cost of Sales [Member] Stock based compensation expense Research and Development Expense [Member] Selling, General and Administrative Expenses [Member] Stock-based compensation expense after income taxes(1) Fair Value of Each Stock Option was Estimated at the Date of Grant using a Black-Scholes option [Abstract] Expected volatility Risk-free interest rate Expected term (in years) Dividend yield Employee Stock Option [Member] Weighted Average Fair Value of Stock Options Granted [Abstract] Weighted average fair value of stock options granted Fair Value Assumptions Used to Value PSU Awards Granted [Abstract] Stock price on grant date (in Dollars per share) Granted Stock Option Activities [Abstract] Number of Shares Exercise Price Contractual Life (in Years) Intrinsic Value Cancelled/Forfeited Cancelled/Forfeited Exercised