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Cash, Cash Equivalents and Current Marketable Securities (Details Textual) (USD $)
In Millions, unless otherwise specified
Dec. 28, 2014
Dec. 29, 2013
Cash Cash Equivalents and Current Marketable Securities [Line Items]    
Available-for-sale Securities, Current $ 18,566us-gaap_AvailableForSaleSecuritiesCurrent $ 8,279us-gaap_AvailableForSaleSecuritiesCurrent
Debt Securities [Member]    
Cash Cash Equivalents and Current Marketable Securities [Line Items]    
Available-for-sale Securities, Current 17,682us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember		 6,160us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Repurchase Agreements [Member]    
Cash Cash Equivalents and Current Marketable Securities [Line Items]    
Available-for-sale Securities, Current   1,100us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_RepurchaseAgreementsMember
Corporate Debt Securities [Member]    
Cash Cash Equivalents and Current Marketable Securities [Line Items]    
Available-for-sale Securities, Current $ 884us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 $ 1,019us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember