Contingencies	3 Months Ended
Contingencies	Jun. 27, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Patent Litigation On October 18, 2019, a patent infringement lawsuit was filed by Arbor Global Strategies LLC (Arbor) against the Company in the U.S. District Court in Delaware (Arbor Global Strategies LLC, v. Xilinx, Inc., Case No. 1:19-cv-01986). The lawsuit pertains to four patents and Arbor seeks unspecified damages, interest, attorneys’ fees, and costs. The Company filed a motion to dismiss the case on December 19, 2019. This motion is still pending. No schedule has been set in the case. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. On December 5, 2019, Analog Devices, Inc. (ADI) filed a patent infringement lawsuit against the Company in the United States District Court for the District of Delaware (Analog Devices, Inc. v. Xilinx, Inc., Case No. 1-19-cv-02225). The lawsuit pertains to eight patents and ADI seeks unspecified damages, interest, attorneys’ fees, costs, and a permanent injunction. The Company filed its answer and counterclaims alleging infringement by ADI of eight patents on January 21, 2020. The Company filed amended counterclaims on April 3, 2020. The Company filed a motion to strike ADI's affirmative defense of inequitable conduct on May 8, 2020. This motion is still pending. The parties’ claims are set for back-to-back trials beginning March 14, 2022 for ADI’s claims and March 28, 2022 for the Company’s claims. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. On April 30, 2020, a patent infringement lawsuit was filed by FG SRC LLC (SRC) against the Company in the U.S. District Court in Delaware (FG SRC LLC v. Xilinx, Inc., Case No. 1:20-cv-00601). The lawsuit pertains to two patents and SRC seeks unspecified damages, interest, and an on-going royalty. The Company filed its answer to the complaint on June 29, 2020. On July 20, 2020, SRC filed an amended complaint. The response date for the Amended Complaint is August 3, 2020. No schedule has been set in the case. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. The Company intends to continue to protect and defend its IP vigorously. Other Matters On June 11, 2015, John P. Neblett, as Chapter 7 Trustee of Valley Forge Composite Technologies, Inc., filed a complaint against Xilinx and others in the U.S. Bankruptcy Court for the Middle District of Pennsylvania (Bankruptcy No. 1:13-bk-05253-JJT). The complaint alleges causes of actions against Xilinx for negligence and civil conspiracy relating to alleged violations of U.S. export laws. It seeks at least $50.0 million in damages, together with punitive damages, from the defendants. On September 21, 2015, the action was withdrawn from the U.S. Bankruptcy Court for the Middle District of Pennsylvania and transferred to the U.S. District Court for the Eastern District of Kentucky. On November 2, 2015, Xilinx, along with other defendants, filed a motion to dismiss the complaint. On November 3, 2015, Xilinx filed a motion for sanctions pursuant to Federal Rule of Civil Procedure 11. On June 27, 2016, the Court denied both motions. On September 11, 2017, Xilinx, along with other defendants, filed motions for summary judgment seeking to dispose of all claims against them. On July 3, 2018, the Court granted both of Xilinx’s motions for summary judgment, disposing of all claims asserted against Xilinx. On August 1, 2018, the Trustee filed a notice of appeal. On August 9, 2018, the Court of Appeals for the Sixth Circuit issued an order to show cause requesting that the appellant address a possible jurisdictional defect. On August 29, 2018, the appellant responded to the order to show cause. On September 10, 2018, appellees, including Xilinx, filed a joint reply. On January 7, 2019, the Court of Appeals issued an order dismissing the appeal for lack of jurisdiction. On February 19, 2019, the District Court issued an order permitting any party seeking to certify the case for appeal to file a motion. On March 11, 2019, defendant Avnet filed a motion to certify the case for appeal. On May 14, 2019 the Court denied Avnet’s motion. On June 4, 2019, Avnet and the counterclaim and crossclaim defendants stipulated to dismissal of Avnet’s remaining counterclaims and crossclaims. The Court entered final judgment on June 25, 2019. On July 22, 2019, the Trustee filed his notice of appeal and filed his opening appellate brief on September 17, 2019. On October 30, 2019, Xilinx filed its appellee brief. On November 20, 2019, the Trustee filed his reply brief. On April 7, 2020, the Sixth Circuit affirmed the District Court’s judgment which granted both of Xilinx’s motions for summary judgment, disposing of all claims asserted against Xilinx. On April 14, 2020, the Trustee filed a motion to extend the time for filing a petition for rehearing, and the Sixth Circuit granted the motion extending the due date until May 14, 2020. On May 14, 2020, the Trustee filed a petition for a rehearing. From time to time, the Company is involved in various disputes and litigation matters that arise in the ordinary course of its business. These include disputes and lawsuits related to intellectual property, mergers and acquisitions, licensing, contract law, tax, regulatory, distribution arrangements, employee relations and other matters. Periodically, the Company reviews the status of each matter and assesses its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and a range of possible losses can be estimated, the Company accrues a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, accruals are based only on the best information available at the time. As additional information becomes available, the Company continues to reassess the potential liability related to pending claims and litigation and may revise estimates.