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Financing Arrangements-Carrying Value and Interest (Details 1) (USD $)
Dec. 28, 2014
Dec. 29, 2013
Aug. 31, 2010
Oct. 23, 2013
Carrying Value of Convertible Notes        
Convertible debt, carrying value $ 2,069,341,000us-gaap_ConvertibleDebt $ 1,985,363,000us-gaap_ConvertibleDebt    
Debt Summary        
Convertible debt, carrying value 2,069,341,000us-gaap_ConvertibleDebt 1,985,363,000us-gaap_ConvertibleDebt    
Less: Convertible short-term debt 869,645,000us-gaap_ConvertibleDebtCurrent 0us-gaap_ConvertibleDebtCurrent    
Convertible long-term debt, carrying value 1,199,696,000us-gaap_ConvertibleDebtNoncurrent 1,985,363,000us-gaap_ConvertibleDebtNoncurrent    
1.5% Sr. Convertible Notes due 2017 [Member]        
Carrying Value of Convertible Notes        
Convertible debt, par value 996,788,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
 
Less: Unamortized bond discount (127,143,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
(170,208,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
   
Convertible debt, carrying value 869,645,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
829,792,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
   
Debt Summary        
Convertible debt, carrying value 869,645,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
829,792,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandSeventeenMember
   
0.5% Sr. Convertible Notes due 2020 [Member]        
Carrying Value of Convertible Notes        
Convertible debt, par value 1,500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
1,500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
  1,500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
Less: Unamortized bond discount (300,304,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
(344,429,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
   
Convertible debt, carrying value 1,199,696,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
1,155,571,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
   
Debt Summary        
Convertible debt, carrying value $ 1,199,696,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
$ 1,155,571,000us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= sndk_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember