ORGANIZATION OF THE COMPANY AND BASIS OF PRESENTATION (Policies)	9 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization of the Company	Organization of the Company Flex Ltd., formerly Flextronics International Ltd., ("Flex", or the "Company") was incorporated in the Republic of Singapore in May 1990. The Company's operations have expanded over the years through a combination of organic growth and acquisitions. The Company is a globally-recognized leading provider of innovative design, engineering, manufacturing, and supply chain services and solutions that span from Sketch-to-Scale^tm; from conceptual sketch to full-scale production. The Company designs, builds, ships and services complete packaged consumer electronics and industrial products for original equipment manufacturers ("OEMs"), through its activities in the following segments: High Reliability Solutions ("HRS"), which is comprised of its medical business including consumer health, digital health, disposables, drug delivery, diagnostics, life sciences and imaging equipment; automotive business, including vehicle electronics, connectivity, and clean technologies; and defense and aerospace businesses, focused on commercial aviation, defense and military; Consumer Technologies Group ("CTG"), which includes its mobile devices business, including smart phones; consumer electronics business, including connected living, wearable electronics including digital sport, game consoles, and connectivity devices; and high-volume computing business, including various supply chain solutions for notebook personal computers ("PC"), tablets, and printers; in addition, CTG group is expanding its business relationships to include supply chain optimization for non-electronics products such as shoes and clothing; Industrial and Emerging Industries ("IEI"), which is comprised of semiconductor and capital equipment, office solutions, household industrial and lifestyle, industrial automation and kiosks, energy and metering, and lighting; and Communications & Enterprise Compute ("CEC"), includes radio access base stations, remote radio heads, and small cells for wireless infrastructure; optical, routing, broadcasting, and switching products for the data and video networks; server and storage platforms for both enterprise and cloud-based deployments; next generation storage and security appliance products; and rack level solutions, converged infrastructure and software-defined product solutions. The Company's strategy is to provide customers with a full range of cost competitive, vertically integrated global supply chain solutions through which the Company can design, build, ship and service a complete packaged product for its OEM customers. This enables the Company's OEM customers to leverage the Company's supply chain solutions to meet their product requirements throughout the entire product life cycle. The Company's service offerings include a comprehensive range of value-added design and engineering services that are tailored to the various markets and needs of its customers. Other focused service offerings relate to manufacturing (including enclosures, metals, plastic injection molding, precision plastics, machining, and mechanicals), system integration and assembly and test services, materials procurement, inventory management, logistics and after-sales services (including product repair, warranty services, re-manufacturing and maintenance) and supply chain management software solutions and component product offerings (including rigid and flexible printed circuit boards and power adapters and chargers).
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP” or “GAAP”) for interim financial information and in accordance with the requirements of Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements, and should be read in conjunction with the Company’s audited consolidated financial statements as of and for the fiscal year ended March 31, 2016 contained in the Company’s Annual Report on Form 10-K. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three-month and nine-month periods ended December 31, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2017. The first quarters for fiscal year 2017 and fiscal year 2016 ended on July 1, 2016, which is comprised of 92 days in the period, and June 26, 2015, which is comprised of 87 days in the period, respectively. The second quarters for fiscal year 2017 and fiscal year 2016 ended on September 30, 2016 and September 25, 2015, which are comprised of 91 days in both periods, respectively. The Company's third quarters end on December 31 of each year, which are comprised of 92 days and 97 days for fiscal years 2017 and 2016, respectively. The accompanying unaudited condensed consolidated financial statements include the accounts of Flex and its majority-owned subsidiaries, after elimination of intercompany accounts and transactions. The Company consolidates its majority-owned subsidiaries and investments in entities in which the Company has a controlling interest. For the consolidated majority-owned subsidiaries in which the Company owns less than 100%, the Company recognizes a noncontrolling interest for the ownership of the noncontrolling owners. Noncontrolling interests are presented as a separate component of total shareholders' equity in the condensed consolidated balance sheets. The associated noncontrolling owners' interests are immaterial for all of the periods presented, and are included in interest and other, net in the condensed consolidated statements of operations. The Company has certain non-majority-owned equity investments in non-publicly traded companies that are accounted for using the equity method of accounting. The equity method of accounting is used when the Company has the ability to significantly influence the operating decisions of the issuer, or if the Company has an ownership percentage of a corporation equal to or generally greater than 20% but less than 50%, and for non-majority-owned investments in partnerships when generally greater than 5%. The equity in earnings (losses) of equity method investees are immaterial for all of the periods presented, and are included in interest and other, net in the condensed consolidated statements of operations.
Recently Adopted and Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncement In March 2016, the Financial Accounting Standards Board ("FASB") issued new guidance intended to reduce the cost and complexity of the accounting for share-based payments. The new guidance simplifies various aspects of the accounting for share-based payments including income tax effects, withholding requirements and forfeitures. The Company elected to early adopt this new guidance beginning in the first quarter of fiscal year 2017. The guidance eliminates additional paid in capital ("APIC") pools and requires companies to recognize all excess tax benefits and tax deficiencies in the income statement when the awards vest or are settled. It also addresses the presentation of excess tax benefits and employee taxes paid on the statement of cash flows. Prior to adoption, the Company elected to not deduct tax benefits for stock-based compensation awards on its tax returns, and accordingly, did not have any excess tax benefits or tax deficiencies upon adoption. The Company therefore determined that adoption of the new guidance had no impact on the condensed consolidated statement of operations and the condensed consolidated statement of cash flows. Further, the new guidance eliminates the requirement to estimate forfeitures and reduce stock compensation expense during the vesting period. Instead, companies can elect to account for actual forfeitures as they occur and record any previously unrecognized compensation expense for estimated forfeitures up to the period of adoption as a retrospective adjustment to beginning retained earnings. The Company has made the election to account for actual forfeitures as they occur starting in fiscal year 2017. After assessment, it was determined that the cumulative effect adjustment required under the new guidance was immaterial and therefore the Company did not record a retrospective adjustment. The Company finally determined that the adoption of this guidance did not have a significant impact on the consolidated financial position, results of operations and cash flows of the Company. Recently Issued Accounting Pronouncements In January 2017, the FASB issued new guidance that changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. This guidance is effective for the Company beginning in the first quarter of fiscal year 2019, with early application permitted. The guidance may result in more asset acquisitions being accounted for as purchases of assets in lieu of business combinations. The Company intends to adopt the guidance when it becomes effective in the first quarter of fiscal year 2019. In October 2016, the FASB issued new guidance to amend the consolidation guidance on how a reporting entity that is the single decision maker of a variable interest entity ("VIE") should treat indirect interests in the entity held through related parties that are under common control with the reporting entity when determining whether it is the primary beneficiary of that VIE. This guidance is effective for the Company beginning in the first quarter of fiscal year 2018, with early adoption permitted. The Company expects the new guidance will have an immaterial impact on its consolidated financial statements, and it intends to adopt the guidance when it becomes effective in the first quarter of fiscal year 2018. In October 2016, the FASB issued new guidance intended to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. This guidance is effective for the Company beginning in the first quarter of fiscal year 2019, with early adoption permitted in the first interim period of fiscal year 2018. The Company intends to early adopt the new guidance starting in the first quarter of fiscal year 2018, with an expected immaterial impact on its consolidated financial statements. In August 2016, the FASB issued new guidance intended to address specific cash flow issues with the objective of reducing the existing diversity in practice. This guidance is effective for the Company beginning in the first quarter of fiscal year 2019, with early application permitted. The Company is currently assessing the impact of this update and the timing of adoption.