Contingencies	12 Months Ended
Apr. 26, 2013
Commitments and Contingencies Disclosure [Abstract]
Contingencies Disclosure	Contingencies The Company is involved in a number of legal actions. The outcomes of these legal actions are not within the Company's complete control and may not be known for prolonged periods of time. In some actions, the claimants seek damages, as well as other relief (including injunctions barring the sale of products that are the subject of the lawsuit), that could require significant expenditures or result in lost revenues. In accordance with U.S. GAAP, the Company records a liability in the consolidated financial statements for loss contingencies when a loss is known or considered probable and the amount can be reasonably estimated. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate than any other, the minimum amount of the range is accrued. If a loss is reasonably possible but not known or probable, and can be reasonably estimated, the estimated loss or range of loss is disclosed. When determining the estimated loss or range of loss, significant judgment is required to estimate the amount and timing of a loss to be recorded. Estimates of probable losses resulting from litigation and governmental proceedings involving the Company are inherently difficult to predict, particularly when the matters are in early procedural stages, with incomplete scientific facts or legal discovery; involve unsubstantiated or indeterminate claims for damages; potentially involve penalties, fines or punitive damages; or could result in a change in business practice. While it is not possible to predict the outcome for most of the matters discussed, the Company believes it is possible that costs associated with them could have a material adverse impact on the Company's consolidated earnings, financial position, or cash flows. Litigation with Wyeth and Cordis Corporation On February 22, 2008, Wyeth and Cordis Corporation (Cordis) filed a lawsuit against the Company and its subsidiary, Medtronic AVE, Inc., in U.S. District Court for the District of New Jersey, alleging that Medtronic's Endeavor drug-eluting stent infringes three U.S. “Morris” patents alleged to be owned by Wyeth and exclusively licensed to Cordis. On January 19, 2012, the Court found the patent claims asserted against Medtronic to be invalid and entered an Order and Judgment in favor of Medtronic and the other defendants. Wyeth and Cordis have appealed. The Company is indemnified for the claims made by Wyeth and Cordis. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter. Litigation with Edwards Lifesciences, Inc. On March 19, 2010, the U.S. District Court for the District of Delaware added Medtronic CoreValve LLC (CoreValve) as a party to litigation pending between Edwards Lifesciences, Inc. (Edwards) and CoreValve, Inc. In the litigation, Edwards asserted that CoreValve’s transcatheter aortic valve replacement product infringed three U.S. “Andersen” patents owned by Edwards. Before trial, the court granted summary judgment to Medtronic as to two of the three patents. Following a trial, on April 1, 2010 a jury found that CoreValve willfully infringed a claim on the remaining "Andersen" patent and awarded total lost profit and royalty damages, as of that time, of $74 million. On November 13, 2012, the U.S. Court of Appeals for the Federal Circuit upheld the jury verdict. Medtronic filed a petition for certiorari to the United States Supreme Court on May 6, 2013. Medtronic recorded an expense of $245 million related to probable and reasonably estimated damages for this matter in the second quarter of fiscal year 2013, of which $84 million was paid on February 28, 2013. On March 12, 2010, Edwards served a second lawsuit in the Delaware court upon CoreValve, Medtronic Vascular, and Medtronic, asserting that Medtronic's transcatheter aortic valve replacement product from CoreValve infringed three U.S. "Andersen" patents owned by Edwards, including two of the patents that were the subject of the first lawsuit. Medtronic has moved to dismiss the lawsuit. Also pending in the Delaware court is Edwards' claim that the CoreValve transcatheter aortic valve replacement product infringes a "Cribier" patent. This claim is scheduled for trial in calendar year 2014. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters. Edwards has also brought actions in Europe alleging patent infringement. Edwards previously asserted that the CoreValve product infringed an "Andersen" patent in Germany and the United Kingdom, which is a counterpart to the U.S. "Andersen" patents. Courts in both countries found that the CoreValve product does not infringe the European "Andersen" patent and dismissed both cases. On August 30, 2012, Edwards commenced a proceeding in Mannheim, Germany, alleging that Medtronic's CoreValve transcatheter valve infringes three European patents and seeking injunctive and other relief. On June 14, 2013, the Mannheim court dismissed Edward's case on the merits that Medtronic's CoreValve transcatheter valve infringes the "Cribier" patent. Proceedings in the other two patents are pending, with one ruling expected July 12, 2013 and a trial hearing scheduled for the other on December 20, 2013. The Company has not recorded an expense related to damages in connection with this matter because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter. Sprint Fidelis Product Liability Matters In 2007, a putative class action was filed in the Ontario Superior Court of Justice in Canada seeking damages for personal injuries allegedly related to the Company's Sprint Fidelis family of defibrillation leads. On October 20, 2009, the court certified a class proceeding but denied class certification on plaintiffs' claim for punitive damages. Pretrial proceedings are underway. The Company has not recorded an expense related to damages in connection with this matter because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter. INFUSE Product Liability Litigation Over the course of fiscal year 2013, plaintiffs filed approximately 100 lawsuits against the Company in the U.S. state and federal courts alleging personal injury from the INFUSE bone graft product. Subsequent to the end of fiscal year 2013, plaintiffs filed approximately 300 additional such lawsuits. Certain law firms have advised the Company that they may bring a large number of similar claims against the Company in the future. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters. Shareholder Related Matters On March 12, 2012, Charlotte Kococinski filed a shareholder derivative action against both the Company and certain of its current and former officers and members of the Board of Directors in the U.S. District Court for the District of Minnesota, setting forth certain allegations, including a claim that defendants violated various purported duties in connection with the INFUSE bone graft product and otherwise. On March 25, 2013, the Court dismissed the case without prejudice. In May 2012, Daniel Himmel and the Saratoga Advantage Trust commenced two other separate shareholder derivative actions in Hennepin County, Minnesota, District Court against the same defendants, making allegations similar to those in the Kococinski case. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters. Mirowski Medtronic is a licensee to the RE 38,119 patent ('119 Patent) and RE 38,897 patent ('897 Patent) owned by Mirowski Family Ventures, LLC (Mirowski) relating to the treatment of hemodynamic dysfunction. Medtronic and Mirowski dispute the application of the '119 and '897 Patents to certain Medtronic cardiac resynchronization products. On December 17, 2007, Medtronic filed an action in U.S. District Court for the District of Delaware seeking a declaration that none of its products infringe any valid claims of either the '119 or '897 Patents. If certain conditions are fulfilled, the '119 and/or '897 Patents are determined to be valid, and the Medtronic products are found to infringe the '119 and/or '897 Patents, Medtronic will be obligated to pay royalties to Mirowski based upon sales of certain cardiac resynchronization therapy-defibrillator (CRT-D) products. On March 30, 2011, the trial court entered a judgment of non-infringement in Medtronic's favor. On September 16, 2012, the Federal Circuit reversed and remanded the trial court's decision for a new trial, based on its holding that the trial court did not properly allocate the burden of proof in the initial proceedings. Medtronic filed a petition for certiorari to the United States Supreme Court on March 15, 2013, which the Supreme Court granted on May 20, 2013. The Company has not recorded an expense pursuant to U.S. GAAP requirements in connection with this matter because any loss is not probable or reasonably estimable. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter. Other Matters On September 25, 2007 and November 16, 2007, the Company received letters from the U.S. Securities and Exchange Commission (SEC) and the U.S. Department of Justice (DOJ), respectively, requesting information relating to any potential violations of the U.S. Foreign Corrupt Practices Act in connection with the sale of medical devices in several non-U.S. countries. A number of competitors have publicly disclosed receiving similar letters. Subsequently, the SEC and DOJ made additional requests for information from the Company. In June 2013, the SEC and the DOJ both informed the Company that they would be closing their investigations without pursuing any enforcement action or charges against the Company. The Company has received subpoenas or document requests from certain government bodies seeking information regarding sales, marketing, clinical, and other information relating to the INFUSE bone graft product, including civil investigative demands from the Attorneys General in Massachusetts, California, Oregon, and Illinois. The Company is fully cooperating with these requests. On September 16, 2009, the Company received a subpoena from the Office of Inspector General for the Department of Health and Human Services in the Eastern District of California requesting production of documents relating to the Company's cardiac rhythm medical devices, including revenue, sales, marketing, and promotional documents, documents relating to reimbursement communications to customers pertaining to the devices, documents relating to scientific studies and registries pertaining to the devices, and documents relating to payments or items of value provided to customers. The Company is fully cooperating with this inquiry. Allegations relating to post-market clinical studies in this matter were resolved as part of the settlement agreement reached with the DOJ, on behalf of the U.S. Attorney's Office for the District of Minnesota, in November 2011. On March 12, 2010, the Company received a civil investigative demand from the DOJ pursuant to the federal False Claims Act seeking information regarding the Company's knowledge about claims to Medicare for the implantation of implantable cardioverter defibrillators (ICDs), including reimbursement advice given by the Company, payments to persons or entities involved in decisions about implantation of ICDs, and the national coverage determination relating to ICDs. The Company is fully cooperating with this inquiry. On October 14, 2010, the Company received a subpoena issued by the U.S. Attorney's Office for the Western District of New York pursuant to the Health Insurance Portability & Accountability Act of 1996, relating to the Company's sales, marketing, and reimbursement support practices regarding certain neurostimulation devices. The Company is fully cooperating with this inquiry. On November 9, 2010, the French Competition Authority commenced an investigation of the Company, along with a number of other medical device companies, and the companies' trade association, Syndicat National de l'Industrie des Technologies Medicales (SNITEM), to determine whether such companies or SNITEM engaged in any anticompetitive practices in responding to tenders to purchase certain medical devices. The Company is fully cooperating with the investigation. On August 24, 2011, the Company received a letter from the DOJ requesting information relating to the Company's practices regarding the replacement of insulin pumps for Medicare beneficiaries. The Company is fully cooperating with this inquiry. On May 6, 2013, the Company received a letter from the United States Attorney's Office for the District of Minnesota requesting information relating to the Company's compliance with the Trade Agreements Act. The Company is fully cooperating with this inquiry. The Company has not recorded an expense related to losses in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters. In the normal course of business, the Company periodically enters into agreements that require it to indemnify customers or suppliers for specific risks, such as claims for injury or property damage arising out of the Company's products or the negligence of its personnel or claims alleging that its products infringe third-party patents or other intellectual property. The Company's maximum exposure under these indemnification provisions cannot be estimated, and the Company has not accrued any liabilities within the consolidated financial statements. Historically, the Company has not experienced significant losses on these types of indemnifications.

Contingencies

The Company is involved in a number of legal actions. The outcomes of these legal actions are not within the Company's complete control and may not be known for prolonged periods of time. In some actions, the claimants seek damages, as well as other relief (including injunctions barring the sale of products that are the subject of the lawsuit), that could require significant expenditures or result in lost revenues. In accordance with U.S. GAAP, the Company records a liability in the consolidated financial statements for loss contingencies when a loss is known or considered probable and the amount can be reasonably estimated. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate than any other, the minimum amount of the range is accrued. If a loss is reasonably possible but not known or probable, and can be reasonably estimated, the estimated loss or range of loss is disclosed. When determining the estimated loss or range of loss, significant judgment is required to estimate the amount and timing of a loss to be recorded. Estimates of probable losses resulting from litigation and governmental proceedings involving the Company are inherently difficult to predict, particularly when the matters are in early procedural stages, with incomplete scientific facts or legal discovery; involve unsubstantiated or indeterminate claims for damages; potentially involve penalties, fines or punitive damages; or could result in a change in business practice. While it is not possible to predict the outcome for most of the matters discussed, the Company believes it is possible that costs associated with them could have a material adverse impact on the Company's consolidated earnings, financial position, or cash flows.

Litigation with Wyeth and Cordis Corporation

On February 22, 2008, Wyeth and Cordis Corporation (Cordis) filed a lawsuit against the Company and its subsidiary, Medtronic AVE, Inc., in U.S. District Court for the District of New Jersey, alleging that Medtronic's Endeavor drug-eluting stent infringes three U.S. “Morris” patents alleged to be owned by Wyeth and exclusively licensed to Cordis. On January 19, 2012, the Court found the patent claims asserted against Medtronic to be invalid and entered an Order and Judgment in favor of Medtronic and the other defendants. Wyeth and Cordis have appealed. The Company is indemnified for the claims made by Wyeth and Cordis. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter.

Litigation with Edwards Lifesciences, Inc.

On March 19, 2010, the U.S. District Court for the District of Delaware added Medtronic CoreValve LLC (CoreValve) as a party to litigation pending between Edwards Lifesciences, Inc. (Edwards) and CoreValve, Inc. In the litigation, Edwards asserted that CoreValve’s transcatheter aortic valve replacement product infringed three U.S. “Andersen” patents owned by Edwards. Before trial, the court granted summary judgment to Medtronic as to two of the three patents. Following a trial, on April 1, 2010 a jury found that CoreValve willfully infringed a claim on the remaining "Andersen" patent and awarded total lost profit and royalty damages, as of that time, of $74 million. On November 13, 2012, the U.S. Court of Appeals for the Federal Circuit upheld the jury verdict. Medtronic filed a petition for certiorari to the United States Supreme Court on May 6, 2013. Medtronic recorded an expense of $245 million related to probable and reasonably estimated damages for this matter in the second quarter of fiscal year 2013, of which $84 million was paid on February 28, 2013.

On March 12, 2010, Edwards served a second lawsuit in the Delaware court upon CoreValve, Medtronic Vascular, and Medtronic, asserting that Medtronic's transcatheter aortic valve replacement product from CoreValve infringed three U.S. "Andersen" patents owned by Edwards, including two of the patents that were the subject of the first lawsuit. Medtronic has moved to dismiss the lawsuit. Also pending in the Delaware court is Edwards' claim that the CoreValve transcatheter aortic valve replacement product infringes a "Cribier" patent. This claim is scheduled for trial in calendar year 2014. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters.

Edwards has also brought actions in Europe alleging patent infringement. Edwards previously asserted that the CoreValve product infringed an "Andersen" patent in Germany and the United Kingdom, which is a counterpart to the U.S. "Andersen" patents. Courts in both countries found that the CoreValve product does not infringe the European "Andersen" patent and dismissed both cases. On August 30, 2012, Edwards commenced a proceeding in Mannheim, Germany, alleging that Medtronic's CoreValve transcatheter valve infringes three European patents and seeking injunctive and other relief. On June 14, 2013, the Mannheim court dismissed Edward's case on the merits that Medtronic's CoreValve transcatheter valve infringes the "Cribier" patent. Proceedings in the other two patents are pending, with one ruling expected July 12, 2013 and a trial hearing scheduled for the other on December 20, 2013. The Company has not recorded an expense related to damages in connection with this matter because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter.

Sprint Fidelis Product Liability Matters

In 2007, a putative class action was filed in the Ontario Superior Court of Justice in Canada seeking damages for personal injuries allegedly related to the Company's Sprint Fidelis family of defibrillation leads. On October 20, 2009, the court certified a class proceeding but denied class certification on plaintiffs' claim for punitive damages. Pretrial proceedings are underway. The Company has not recorded an expense related to damages in connection with this matter because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter.

INFUSE Product Liability Litigation

Over the course of fiscal year 2013, plaintiffs filed approximately 100 lawsuits against the Company in the U.S. state and federal courts alleging personal injury from the INFUSE bone graft product. Subsequent to the end of fiscal year 2013, plaintiffs filed approximately 300 additional such lawsuits. Certain law firms have advised the Company that they may bring a large number of similar claims against the Company in the future. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters.

Shareholder Related Matters

On March 12, 2012, Charlotte Kococinski filed a shareholder derivative action against both the Company and certain of its current and former officers and members of the Board of Directors in the U.S. District Court for the District of Minnesota, setting forth certain allegations, including a claim that defendants violated various purported duties in connection with the INFUSE bone graft product and otherwise. On March 25, 2013, the Court dismissed the case without prejudice. In May 2012, Daniel Himmel and the Saratoga Advantage Trust commenced two other separate shareholder derivative actions in Hennepin County, Minnesota, District Court against the same defendants, making allegations similar to those in the Kococinski case. The Company has not recorded an expense related to damages in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters.

Mirowski

Medtronic is a licensee to the RE 38,119 patent ('119 Patent) and RE 38,897 patent ('897 Patent) owned by Mirowski Family Ventures, LLC (Mirowski) relating to the treatment of hemodynamic dysfunction. Medtronic and Mirowski dispute the application of the '119 and '897 Patents to certain Medtronic cardiac resynchronization products. On December 17, 2007, Medtronic filed an action in U.S. District Court for the District of Delaware seeking a declaration that none of its products infringe any valid claims of either the '119 or '897 Patents. If certain conditions are fulfilled, the '119 and/or '897 Patents are determined to be valid, and the Medtronic products are found to infringe the '119 and/or '897 Patents, Medtronic will be obligated to pay royalties to Mirowski based upon sales of certain cardiac resynchronization therapy-defibrillator (CRT-D) products. On March 30, 2011, the trial court entered a judgment of non-infringement in Medtronic's favor. On September 16, 2012, the Federal Circuit reversed and remanded the trial court's decision for a new trial, based on its holding that the trial court did not properly allocate the burden of proof in the initial proceedings. Medtronic filed a petition for certiorari to the United States Supreme Court on March 15, 2013, which the Supreme Court granted on May 20, 2013. The Company has not recorded an expense pursuant to U.S. GAAP requirements in connection with this matter because any loss is not probable or reasonably estimable. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from this matter.

Other Matters

On September 25, 2007 and November 16, 2007, the Company received letters from the U.S. Securities and Exchange Commission (SEC) and the U.S. Department of Justice (DOJ), respectively, requesting information relating to any potential violations of the U.S. Foreign Corrupt Practices Act in connection with the sale of medical devices in several non-U.S. countries. A number of competitors have publicly disclosed receiving similar letters. Subsequently, the SEC and DOJ made additional requests for information from the Company. In June 2013, the SEC and the DOJ both informed the Company that they would be closing their investigations without pursuing any enforcement action or charges against the Company.

The Company has received subpoenas or document requests from certain government bodies seeking information regarding sales, marketing, clinical, and other information relating to the INFUSE bone graft product, including civil investigative demands from the Attorneys General in Massachusetts, California, Oregon, and Illinois. The Company is fully cooperating with these requests.

On September 16, 2009, the Company received a subpoena from the Office of Inspector General for the Department of Health and Human Services in the Eastern District of California requesting production of documents relating to the Company's cardiac rhythm medical devices, including revenue, sales, marketing, and promotional documents, documents relating to reimbursement communications to customers pertaining to the devices, documents relating to scientific studies and registries pertaining to the devices, and documents relating to payments or items of value provided to customers. The Company is fully cooperating with this inquiry. Allegations relating to post-market clinical studies in this matter were resolved as part of the settlement agreement reached with the DOJ, on behalf of the U.S. Attorney's Office for the District of Minnesota, in November 2011.

On March 12, 2010, the Company received a civil investigative demand from the DOJ pursuant to the federal False Claims Act seeking information regarding the Company's knowledge about claims to Medicare for the implantation of implantable cardioverter defibrillators (ICDs), including reimbursement advice given by the Company, payments to persons or entities involved in decisions about implantation of ICDs, and the national coverage determination relating to ICDs. The Company is fully cooperating with this inquiry.

On October 14, 2010, the Company received a subpoena issued by the U.S. Attorney's Office for the Western District of New York pursuant to the Health Insurance Portability & Accountability Act of 1996, relating to the Company's sales, marketing, and reimbursement support practices regarding certain neurostimulation devices. The Company is fully cooperating with this inquiry.

On November 9, 2010, the French Competition Authority commenced an investigation of the Company, along with a number of other medical device companies, and the companies' trade association, Syndicat National de l'Industrie des Technologies Medicales (SNITEM), to determine whether such companies or SNITEM engaged in any anticompetitive practices in responding to tenders to purchase certain medical devices. The Company is fully cooperating with the investigation.

On August 24, 2011, the Company received a letter from the DOJ requesting information relating to the Company's practices regarding the replacement of insulin pumps for Medicare beneficiaries. The Company is fully cooperating with this inquiry.

On May 6, 2013, the Company received a letter from the United States Attorney's Office for the District of Minnesota requesting information relating to the Company's compliance with the Trade Agreements Act. The Company is fully cooperating with this inquiry.

The Company has not recorded an expense related to losses in connection with these matters because any potential loss is not currently probable or reasonably estimable under U.S. GAAP. Additionally, the Company cannot reasonably estimate the range of loss, if any, that may result from these matters.

In the normal course of business, the Company periodically enters into agreements that require it to indemnify customers or suppliers for specific risks, such as claims for injury or property damage arising out of the Company's products or the negligence of its personnel or claims alleging that its products infringe third-party patents or other intellectual property. The Company's maximum exposure under these indemnification provisions cannot be estimated, and the Company has not accrued any liabilities within the consolidated financial statements. Historically, the Company has not experienced significant losses on these types of indemnifications.