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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Customer Relationships | Minimum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 14 years  
Customer Relationships | Maximum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 14 years  
Patents, Rights and Leasehold Interests [Member] | Minimum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 5 years  
Patents, Rights and Leasehold Interests [Member] | Maximum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 25 years  
Contractual Rights | Minimum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 17 years  
Contractual Rights | Maximum [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful life 22 years  
Successor    
Acquired Finite-Lived Intangible Assets [Line Items]    
Accumulated amortization (8.2)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
$ (1.6)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Amortized intangible assets, net 89.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
96.6us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Trademarks 1,291.7us-gaap_IndefiniteLivedTrademarks
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
1,309.2us-gaap_IndefiniteLivedTrademarks
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Intangible assets, net 1,380.9us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
1,405.8us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Successor | Customer Relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortized intangible assets, gross 54.4us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
55.2us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Successor | Patents, Rights and Leasehold Interests [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortized intangible assets, gross 3.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= sfd_PatentsRightsAndLeaseholdInterestsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
3.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= sfd_PatentsRightsAndLeaseholdInterestsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
Successor | Contractual Rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortized intangible assets, gross 40.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ContractualRightsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
$ 40.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ContractualRightsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember