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DEBT Convertible Notes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 5 Months Ended
Dec. 29, 2013
Sep. 26, 2013
Jul. 31, 2008
Debt Instrument [Line Items]      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     17.6us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Payments for Repurchase of Warrants $ 79.4us-gaap_PaymentsForRepurchaseOfWarrants    
Senior Unsecured Convertible Notes, Four Percent, Due June 2013      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount     400.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= sfd_SeniorUnsecuredConvertibleNotesFourPercentDueJune2013Member
Repayments of Long-term Debt   $ 400.0us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= sfd_SeniorUnsecuredConvertibleNotesFourPercentDueJune2013Member
 
Purchased Call Option      
Debt Instrument [Line Items]      
Option Indexed to Issuer's Equity, Indexed Shares     17.6us-gaap_OptionIndexedToIssuersEquityIndexedShares
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_CallOptionMember