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Share-Based Compensation-Activity (Details Textuals 1) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Compensation and Benefits    
Share-based compensation expense capitalized in inventory $ 4.3us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount $ 2.7us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost 10.8us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost  
Employee Stock Option [Member]    
Compensation and Benefits    
Total unrecognized compensation cost, net of forfeitures, related to awards granted to employees 36.2us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition 2 years 2 months  
Restricted Stock Units (RSUs) [Member]    
Compensation and Benefits    
Total unrecognized compensation cost, net of forfeitures, related to awards granted to employees 244.8us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
 
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition 2 years 7 months  
Employee Stock Purchase Plan Shares [Member]    
Compensation and Benefits    
Total unrecognized compensation expense for ESPP $ 1.5sndk_EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnEmployeeStockPurchasePlan
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
 
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition 0 years 2 months