| **Fair Value Measurements And Financial Instruments (Tables)**                                            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **Fair Value Disclosures [Abstract]**                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Summary Of Components Of Available-For-Sale Securities                                                    | The following table summarizes the components of the balance of the Company’s available-for-sale securities at June 28, 2014 and December 28, 2013 (in millions): June 28, 2014 December 28, 2013Adjusted cost$7 $7Gross unrealized gains29 28Fair value$36 $35                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Summary Of Financial Assets Measured At Fair Value On A Recurring Basis                                   | A summary of financial assets measured at fair value on a recurring basis at June 28, 2014 and December 28, 2013 is as follows (in millions): Balance SheetClassificationJune 28, 2014 Quoted PricesIn ActiveMarkets(Level 1) SignificantOtherObservableInputs(Level 2) SignificantUnobservableInputs(Level 3)Assets        Money-market securitiesCash and cash equivalents$1,142 $1,142 $— $—Available-for-sale securitiesOther current assets36 36 — —Trading securitiesOther assets289 289 — —Total assets 1,467 1,467 — —         Liabilities        Contingent considerationOther current liabilities148 — — 148Contingent considerationOther liabilities58 — — 58Total liabilities $206 $— $— $206 Balance SheetClassificationDecember 28, 2013 Quoted PricesIn ActiveMarkets(Level 1) SignificantOtherObservableInputs(Level 2) SignificantUnobservableInputs(Level 3)Assets        Money-market securitiesCash and cash equivalents$875 $875 $— $—Available-for-sale securitiesOther current assets35 35 — —Trading securitiesOther assets279 279 — —Total assets 1,189 1,189 — —         Liabilities        Contingent considerationOther liabilities195 — — 195Total liabilities $195 $— $— $195 |
| Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]                               | The recurring Level 3 fair value measurements of the Company's contingent consideration liability include the following significant unobservable inputs (in millions):Contingent Consideration LiabilityFair Value as of June 28, 2014Valuation Technique Unobservable Input Range         Endosense regulatory-based milestone$148Probability Weighted Discounted Cash Flow Discount Rate 1.08%-1.46%    Probability of Payment   95%    Projected Year of Payment   2014         Nanostim revenue-based milestone58Probability Weighted Discounted Cash Flow Discount Rate   5.00%    Probability of Payment   100%    Projected Years of Three Annual Payments 2016, 2017, 2018Total contingent consideration liability$206                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table provides a reconciliation of the beginning and ending balances of the Company' contingent consideration liability associated with its Endosense and Nanostim acquisitions since December 28, 2013 for the three and six months ended June 28, 2014 (in millions):  EndosenseNanostimTotalBalance as of December 28, 2013$139$56$195Change in fair value of contingent consideration—11Foreign currency translation2—2Balance as of March 29, 201414157198Change in fair value of contingent consideration718Foreign currency translation———Balance as of June 28, 2014$148$58$206                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |

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| - Definition
Tabular disclosure of quantitative information about the inputs used in the fair value measurement of liabilities. This disclosure may include, but is not limited to, the fair value of the liability, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs.
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| - Definition
Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.
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| - Definition
Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.
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No definition available.
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| - Definition
Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).
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