Note 14. Employees Related Pension Obligations (Details) (USD $)
12 Months Ended 3 Months Ended
Dec. 28, 2014
Mar. 30, 2014
Dec. 29, 2013
Aug. 01, 2013
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Restricted Cash and Cash Equivalents       $ 23,923,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 1.30%      
Defined Contribution Plan, Cost Recognized 1,800,000      
Accrued Employee Benefits, Current 34,079,000   57,876,000  
Maximum [Member] | Spansion Corporate Defined Contribution Pension Plan [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Percentage Change in Actuarial Assumptions and Plan Provisions Amortized 10.00%      
MCA Business Employee [Member] | Spansion Corporate Defined Contribution Pension Plan [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 6.10%      
Fujitsu Defined Benefit Corporate Pension [Member] | Prepaid Expenses and Other Current Assets [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Restricted Cash and Cash Equivalents 4,900,000      
Fujitsu Defined Benefit Corporate Pension [Member] | Other Noncurrent Assets [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Restricted Cash and Cash Equivalents 9,400,000      
Fujitsu Defined Benefit Corporate Pension [Member] | Accrued Compensation And Benefits [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Benefit Pension Plan Liabilities, Current 4,900,000      
Fujitsu Defined Benefit Corporate Pension [Member] | Other Noncurrent Liabilities [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Benefit Pension Plan, Liabilities, Noncurrent 9,900,000      
Fujitsu Defined Benefit Corporate Pension [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Pension Expense   1,500,000    
Gain on Transfer of Fujitsu Defined Pension Plan to Spansion Management Pension Plan 2,500,000      
Spansion Corporate Defined Contribution Pension Plan [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 1.00%      
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), before Tax 100,000      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 7.80%      
Accrued Employee Benefits, Current 200,000      
Spansion Innovates Group Cash Balance Plan [Member] | Other Noncurrent Liabilities [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Benefit Pension Plan, Liabilities, Noncurrent 900,000      
Spansion Innovates Group Cash Balance Plan [Member]        
Note 14. Employees Related Pension Obligations (Details) [Line Items]        
Defined Benefit Plan, Net Periodic Benefit Cost $ 900,000