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Goodwill And Other Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Jun. 28, 2014
Sep. 28, 2013
Jan. 03, 2015
Jun. 07, 2013
Goodwill [Roll Forward]            
Beginning balance $ 3,524us-gaap_Goodwill $ 2,961us-gaap_Goodwill        
Foreign currency translation and other (81)us-gaap_GoodwillTranslationAdjustments (9)us-gaap_GoodwillTranslationAdjustments        
Ending balance 3,532us-gaap_Goodwill 3,524us-gaap_Goodwill     3,532us-gaap_Goodwill  
Spinal Modulation [Member]            
Goodwill [Roll Forward]            
Beginning balance           46us-gaap_Goodwill
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
Goodwill, acquired during the period   82us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
       
Goodwill, Purchase Accounting Adjustments (36)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
  (36)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
(35)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
   
Ending balance 46us-gaap_Goodwill
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
      46us-gaap_Goodwill
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
46us-gaap_Goodwill
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= stj_SpinalModulationMember
Endosense [Member]            
Goodwill [Roll Forward]            
Goodwill, acquired during the period   258us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= stj_EndosenseMember
       
Nanostim [Member]            
Goodwill [Roll Forward]            
Goodwill, acquired during the period   149us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= stj_NanostimMember
       
Cardiomems [Member]            
Goodwill [Roll Forward]            
Goodwill, acquired during the period   83us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= stj_CardiomemsMember
       
NeuroTherm, Inc. [Member]            
Goodwill [Roll Forward]            
Goodwill, acquired during the period 125us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= stj_NeuroThermInc.Member
         
Goodwill, Purchase Accounting Adjustments         $ (7)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= stj_NeuroThermInc.Member