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Financial Instruments (Details) (Gain (Loss) from Hedging Transactions) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
12 Months Ended |
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Dec. 27, 2014
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Sep. 27, 2014
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Jun. 28, 2014
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Mar. 29, 2014
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Dec. 28, 2013
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Sep. 28, 2013
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Jun. 29, 2013
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Mar. 30, 2013
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Dec. 27, 2014
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Dec. 28, 2013
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Dec. 29, 2012
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Research and development |
$ 238us-gaap_ResearchAndDevelopmentExpense |
$ 278us-gaap_ResearchAndDevelopmentExpense |
$ 277us-gaap_ResearchAndDevelopmentExpense |
$ 279us-gaap_ResearchAndDevelopmentExpense |
$ 293us-gaap_ResearchAndDevelopmentExpense |
$ 288us-gaap_ResearchAndDevelopmentExpense |
$ 308us-gaap_ResearchAndDevelopmentExpense |
$ 312us-gaap_ResearchAndDevelopmentExpense |
$ 1,072us-gaap_ResearchAndDevelopmentExpense |
$ 1,201us-gaap_ResearchAndDevelopmentExpense |
$ 1,354us-gaap_ResearchAndDevelopmentExpense |
| Marketing, general and administrative |
144us-gaap_SellingGeneralAndAdministrativeExpense |
150us-gaap_SellingGeneralAndAdministrativeExpense |
154us-gaap_SellingGeneralAndAdministrativeExpense |
156us-gaap_SellingGeneralAndAdministrativeExpense |
169us-gaap_SellingGeneralAndAdministrativeExpense |
155us-gaap_SellingGeneralAndAdministrativeExpense |
171us-gaap_SellingGeneralAndAdministrativeExpense |
179us-gaap_SellingGeneralAndAdministrativeExpense |
604us-gaap_SellingGeneralAndAdministrativeExpense |
674us-gaap_SellingGeneralAndAdministrativeExpense |
823us-gaap_SellingGeneralAndAdministrativeExpense |
| Other income (expense), net |
3us-gaap_OtherNonoperatingIncomeExpense |
(2)us-gaap_OtherNonoperatingIncomeExpense |
(49)us-gaap_OtherNonoperatingIncomeExpense |
(21)us-gaap_OtherNonoperatingIncomeExpense |
(2)us-gaap_OtherNonoperatingIncomeExpense |
2us-gaap_OtherNonoperatingIncomeExpense |
(2)us-gaap_OtherNonoperatingIncomeExpense |
(3)us-gaap_OtherNonoperatingIncomeExpense |
(69)us-gaap_OtherNonoperatingIncomeExpense |
(5)us-gaap_OtherNonoperatingIncomeExpense |
6us-gaap_OtherNonoperatingIncomeExpense |
| Foreign Currency Forward Contracts | Contracts Designated as Cash Flow Hedging Instruments |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Other comprehensive income (loss) |
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(3)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
(3)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
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| Research and development |
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3us-gaap_ResearchAndDevelopmentExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
2us-gaap_ResearchAndDevelopmentExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
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| Marketing, general and administrative |
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3us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
1us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
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| Foreign Currency Forward Contracts | Contracts not Designated as Hedging Instruments |
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| Derivative Instruments, Gain (Loss) [Line Items] |
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| Other income (expense), net |
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$ (3)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_NondesignatedMember |
$ (2)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_NondesignatedMember |
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