| **Fair Value Measurements And Financial Instruments** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 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| **Fair Value Disclosures [Abstract]**                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                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| Fair Value Measurements And Financial Instruments     | FAIR VALUE MEASUREMENTSThe fair value measurement accounting standard provides a framework for measuring fair value and defines fair value as the price that would be received to sell an asset or paid to transfer a liability. Fair value is a market-based measurement that should be determined using assumptions that market participants would use in pricing an asset or liability. The standard establishes a valuation hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on independent market data sources. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available. The valuation hierarchy is composed of three categories. The categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement.The categories within the valuation hierarchy are described as follows:•Level 1 – Inputs to the fair value measurement are quoted prices in active markets for identical assets or liabilities.•Level 2 – Inputs to the fair value measurement include quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly.•Level 3 – Inputs to the fair value measurement are unobservable inputs or valuation techniques.Assets and Liabilities that are Measured at Fair Value on a Recurring BasisThe fair value measurement standard applies to certain financial assets and liabilities that are measured at fair value on a recurring basis (each reporting period). These financial assets and liabilities include money-market securities, trading marketable securities, available-for-sale marketable securities, derivative instruments and contingent consideration liabilities. The Company continues to record these items at fair value on a recurring basis. The Company does not have any material nonfinancial assets or liabilities that are measured at fair value on a recurring basis. A summary of the valuation methodologies used for the respective financial assets and liabilities measured at fair value on a recurring basis is as follows:Money-market securities: The Company’s money-market securities include funds that are traded in active markets and are recorded at fair value based upon the quoted market prices. The Company classifies these securities as level 1.Available-for-sale securities: The Company’s available-for-sale securities include publicly-traded equity securities that are traded in active markets and are recorded at fair value based upon the closing stock prices. The Company classifies these securities as level 1. Trading securities: The Company’s trading securities include publicly-traded mutual funds that are traded in active markets and are recorded at fair value based upon quoted market prices of the net asset values of the funds. The Company classifies these securities as level 1.The following table summarizes the components of the balance of the Company’s available-for-sale securities at April 4, 2015 and January 3, 2015 (in millions): April 4, 2015 January 3, 2015Adjusted cost$5 $6Gross unrealized gains26 24Fair value$31 $30Derivative instruments:  Fair values for the Company’s derivative financial instruments are based on quoted market prices of comparable instruments, if available, or more commonly on standard pricing models that use as their basis readily observable market parameters from industry standard data providers. These models reflect contractual terms of the derivatives, including period to maturity and market-based parameters such as foreign currency exchange rates. They do not contain a high level of subjectivity as the techniques used in the models do not require significant judgment and inputs are readily observable from actively quoted markets. The Company classifies these instruments as level 2 (see Note 10).Contingent consideration: The acquisition date fair value is measured based on the consideration expected to be transferred (probability-weighted), discounted back to present value. The discount rate used is determined at the time of measurement in accordance with accepted valuation methods. The Company measures the liability on a recurring basis using Level 3 inputs including projected revenues or cash flows, growth rates, discount rates, probabilities of payment and projected payment dates. Projected revenues are based on the Company's most recent internal operating budgets and long-term strategic plans. Increases or decreases to any of the inputs may result in significantly higher or lower fair value measurements. A summary of assets and liabilities measured at fair value on a recurring basis at April 4, 2015 and January 3, 2015 is as follows (in millions): Balance SheetClassificationApril 4, 2015 Quoted PricesIn ActiveMarkets(Level 1) SignificantOtherObservableInputs(Level 2) SignificantUnobservableInputs(Level 3)Assets           Money-market securitiesCash and cash equivalents$219 $219 $— $—   Available-for-sale   securitiesOther current assets31 31 — —   Foreign currency forward   contractsOther current assets28 — 28 —   Trading securitiesOther assets315 315 — —   Foreign currency forward   contractsOther assets5 — 5 —Total assets $598 $565 $33 $—         Liabilities        Contingent considerationOther liabilities$27 $— $— $27Total liabilities $27 $— $— $27 Balance SheetClassificationJanuary 3, 2015 Quoted PricesIn ActiveMarkets(Level 1) SignificantOtherObservableInputs(Level 2) SignificantUnobservableInputs(Level 3)Assets        Money-market securitiesCash and cash equivalents$729 $729 $— $—Available-for-sale securitiesOther current assets30 30 — —Trading securitiesOther assets301 301 — —Total assets $1,060 $1,060 $— $—         Liabilities        Contingent considerationOther liabilities$50 $— $— $50Total liabilities $50 $— $— $50The 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 April 4, 2015Valuation Technique Unobservable Input Range         Nanostim revenue-based milestone$27Probability Weighted Discounted Cash Flow Discount Rate   5.00%    Probability of Payment   90%    Projected Years of Three Annual Payments 2016, 2017, 2018Total contingent consideration liability$27       Additionally, the following table provides a reconciliation of the beginning and ending balances of the Company' contingent consideration liability associated with its Nanostim acquisition since January 3, 2015 as of April 4, 2015 (in millions):  NanostimBalance as of January 3, 2015$50Change in fair value of contingent consideration(23)Balance as of April 4, 2015$27Assets and Liabilities that are Measured at Fair Value on a Nonrecurring BasisDisclosures are required for certain assets and liabilities that are measured at fair value but are recognized and disclosed at fair value on a nonrecurring basis in periods subsequent to initial recognition. For St. Jude Medical, such measurements of fair value primarily relate to long-lived assets, goodwill, indefinite-lived intangible assets and cost method investments.Other than the long-lived asset impairment discussed as follows, there were no other material impairments that were measured at fair value on a nonrecurring basis for the three months ended April 4, 2015. Long-lived assets: During the first quarter of both 2015 and 2014, the Company recognized $1 million of fixed asset write-offs associated with projects abandoned under the new realigned structure. Typically the Company measures the fair value of its long-lived assets, such as its definite-lived intangible assets and property, plant and equipment using independent appraisals, market models and discounted cash flow models. However, as the fixed assets had no alternative future use and therefore no discrete future cash flows, the assets were fully impaired. Cost method investments: The Company also holds investments in equity securities that are accounted for as cost method investments, which are classified as other assets and measured at fair value on a nonrecurring basis. The carrying value of these investments was $72 million and $71 million as of April 4, 2015 and January 3, 2015, respectively. The fair value of the Company’s cost method investments was not estimated during the first quarter of 2015 since there were no identified events or changes in circumstances that may have had a significant adverse effect on the fair value of these investments. Fair Value Measurements of Other Financial InstrumentsThe aggregate fair value of the Company’s fixed-rate senior notes at April 4, 2015 (measured using quoted prices in active markets) was $2,386 million compared to the aggregate carrying value of $2,271 million (inclusive of the terminated interest rate swaps and unamortized debt discounts). The fair value of the Company’s variable-rate debt obligations at April 4, 2015 approximated its aggregate $1,233 million carrying value due to the variable interest rate and short-term nature of these instruments. The Company also had $476 million and $713 million of cash equivalents invested in short-term deposits and interest and non-interest bearing bank accounts at April 4, 2015 and January 3, 2015, respectively. |

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| - Definition
The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.
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