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PENSION AND OTHER RETIREMENT PLANS Schedule of Contributions to Multiemployer Plans (Details) (USD $)
In Millions, unless otherwise specified
8 Months Ended 12 Months Ended
Dec. 29, 2013
Dec. 28, 2014
Apr. 28, 2013
Apr. 29, 2012
Multiemployer Plans [Line Items]        
Multiemployer Plan, Period Contributions $ 1.1us-gaap_MultiemployerPlanPeriodContributions $ 1.6us-gaap_MultiemployerPlanPeriodContributions $ 1.5us-gaap_MultiemployerPlanPeriodContributions $ 1.4us-gaap_MultiemployerPlanPeriodContributions
United Food and Commerical Workers International Union Industry Pension Fund        
Multiemployer Plans [Line Items]        
Multiemployer Plans, Certified Zone Status   Green    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description   Multiple    
Entity Tax Identification Number   516055922    
Multiemployer Plan Number   001    
Multiemployer Plan, Period Contributions 0.9us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_UnitedFoodAndCommericalWorkersInternationalUnionIndustryPensionFundMember
1.3us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_UnitedFoodAndCommericalWorkersInternationalUnionIndustryPensionFundMember
1.2us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_UnitedFoodAndCommericalWorkersInternationalUnionIndustryPensionFundMember
1.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_UnitedFoodAndCommericalWorkersInternationalUnionIndustryPensionFundMember
Central Pension Fund of the International Union of Operating Engineers and Participating Employers        
Multiemployer Plans [Line Items]        
Multiemployer Plans, Certified Zone Status   Green    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description   October 2018    
Entity Tax Identification Number   366052390    
Multiemployer Plan Number   001    
Multiemployer Plan, Period Contributions 0.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_CentralPensionFundOfInternationalUnionOfOperatingEngineersAndParticipatingEmployersMember
0.2us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_CentralPensionFundOfInternationalUnionOfOperatingEngineersAndParticipatingEmployersMember
0.2us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_CentralPensionFundOfInternationalUnionOfOperatingEngineersAndParticipatingEmployersMember
0.2us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_CentralPensionFundOfInternationalUnionOfOperatingEngineersAndParticipatingEmployersMember
IAM National Pension Fund National Pension Plan        
Multiemployer Plans [Line Items]        
Multiemployer Plans, Certified Zone Status   Green    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description   February 2014    
Entity Tax Identification Number   516031295    
Multiemployer Plan Number   002    
Multiemployer Plan, Period Contributions $ 0.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_IamNationalPensionFundNationalPensionPlanMember
$ 0.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_IamNationalPensionFundNationalPensionPlanMember
$ 0.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_IamNationalPensionFundNationalPensionPlanMember
$ 0.1us-gaap_MultiemployerPlanPeriodContributions
/ us-gaap_MultiemployerPlanNameAxis
= sfd_IamNationalPensionFundNationalPensionPlanMember