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Goodwill And Other Intangible Assets Goodwill And Other Intangible Assets Narrative (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Operating Expense [Member]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 58us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
$ 29us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
Operating Expense [Member] | Developed Technology Rights [Member]      
Intangible asset impairment charges, Finite-lived     31us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
Operating Expense [Member] | Customer Relationships [Member]      
Intangible asset impairment charges, Finite-lived   13us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
Operating Expense [Member] | In Process Research and Development [Member]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 50us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
15us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
 
Operating Expense [Member] | Trade Names [Member]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 8us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
14us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
CardioMEMS, Inc [Member]      
Reclassification of Acquired in Process Research and Development from indefinite-lived to definite-lived 63stj_ReclassificationofAcquiredinProcessResearchandDevelopmentfromindefinitelivedtodefinitelived
/ us-gaap_BusinessAcquisitionAxis
= stj_CardioMEMSIncMember
   
CardioMEMS, Inc [Member] | Developed Technology Rights [Member]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 11 years    
Endosense S.A. [Member]      
Reclassification of Acquired in Process Research and Development from indefinite-lived to definite-lived $ 33stj_ReclassificationofAcquiredinProcessResearchandDevelopmentfromindefinitelivedtodefinitelived
/ us-gaap_BusinessAcquisitionAxis
= stj_EndosenseS.A.Member
   
Endosense S.A. [Member] | Developed Technology Rights [Member]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 7 years