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Goodwill and Intangible Assets (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Jun. 29, 2014
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Goodwill and Finite-lived Intangible Assets        
Goodwill, Period Increase (Decrease)   $ 513,200,000us-gaap_GoodwillPeriodIncreaseDecrease    
In-process Research and Development Reclassified to Developed Product Technology 6,300,000sndk_InprocessResearchandDevelopmentReclassifiedtoDevelopedProductTechnology      
Impairment of acquisition-related intangible assets   0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 83,228,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 860,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Amortization of Intangible Assets   148,600,000us-gaap_AmortizationOfIntangibleAssets 84,300,000us-gaap_AmortizationOfIntangibleAssets 76,500,000us-gaap_AmortizationOfIntangibleAssets
Pliant Technology Inc. [Member]        
Goodwill and Finite-lived Intangible Assets        
Impairment of acquisition-related intangible assets     $ 83,200,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_BusinessAcquisitionAxis
= sndk_BusinessAcquisitionAcquiree1Member