ORGANIZATION OF THE COMPANY AND BASIS OF PRESENTATION (Policies)	3 Months Ended
	Jun. 28, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	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, 2024 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 statement have been included. Operating results for the three-month period ended June 28, 2024 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2025.
Fiscal Period	The first quarters for fiscal years 2025 and 2024 ended on June 28, 2024, which is comprised of 89 days in the period, and June 30, 2023, which is comprised of 91 days, respectively.
Basis of Presentation and Principles of Consolidation	The accompanying unaudited condensed consolidated financial statements include the accounts of Flex and its subsidiaries, after elimination of intercompany accounts and transactions. The Company consolidates subsidiaries and investments in entities in which the Company has a controlling interest. For the consolidated subsidiaries in which the Company owns less than 100%, the Company recognizes a noncontrolling interest for the ownership of the noncontrolling owners. On January 2, 2024, Flex completed its spin-off (the "Spin-off") of its remaining interest in Nextracker Inc. ("Nextracker"). After the Spin-off, Flex no longer consolidates the financial results of Nextracker within its financial results of continuing operations. For all the periods prior to the Spin-off, the financial results of Nextracker are presented as net earnings from discontinued operations in the condensed consolidated statements of operations and unless otherwise indicated Flex's disclosures are presented on a continuing operations basis. The historical statements of comprehensive income and cash flows and the balances related to shareholders' equity have not been revised to reflect the Spin-off. See note 6 "Discontinued Operations" for additional information.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Estimates are used in accounting for, among other things: allowances for doubtful accounts; inventory write-downs; valuation allowances for deferred tax assets; uncertain tax positions; valuation and useful lives of long-lived assets including property, equipment, and intangible assets; valuation of goodwill; valuation of investments in privately held companies; asset impairments; fair values of financial instruments, notes receivable and derivative instruments; restructuring charges; contingencies; warranty provisions; incremental borrowing rates in determining the present value of lease payments; accruals for potential price adjustments arising from customer contracts; fair values of assets obtained and liabilities assumed in business combinations; and the fair values of stock options and restricted share unit awards granted under the Company's stock-based compensation plans. Due to geopolitical conflicts (including the Russian invasion of Ukraine, the Israel-Hamas war, and other geopolitical conflicts), there has been and will continue to be uncertainty and disruption in the global economy and financial markets. The Company has made estimates and assumptions taking into consideration certain possible impacts due to the Russian invasion of Ukraine and the Israel-Hamas war. These estimates may change, as new events occur, and additional information is obtained. Actual results may differ from previously estimated amounts, and such differences may be material to the consolidated financial statements. Estimates and assumptions are reviewed periodically, and the effects of revisions are reflected in the period they occur.
Supplier Finance Programs	Supplier Finance Programs The Company has four supplier finance programs, all of which have substantially similar characteristics, with various financial institutions that act as the paying agent for certain payables of the Company. The Company established these programs through agreements with the financial institutions to enable more efficient payment processing to our suppliers while also providing our suppliers a potential source of liquidity to the extent they choose to sell their receivables to the financial institutions in advance of the due date. Our suppliers’ participation in the programs is voluntary, the Company is not involved in negotiations of the suppliers’ arrangements with the financial institutions to sell their receivables, and our rights and obligations to our suppliers are not impacted by our suppliers’ decisions to sell amounts under these programs. Under these supplier finance programs, the Company pays the financial institutions the stated amount of confirmed invoices from its participating suppliers on the original maturity dates of the invoices. All payment terms are short-term in nature and are not dependent on whether the suppliers participate in the supplier finance programs or if the suppliers elect to receive early payment from the financial institutions. No guarantees are provided by the Company under the supplier finance programs and the Company incurs no costs related to the programs. We have no economic interest in a supplier’s decision to participate in the supplier finance programs.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09 "Income Taxes (Topic 740): Improvements to Income Tax Disclosures", which expands disclosures in an entity’s income tax rate reconciliation table and regarding cash taxes paid both in the U.S. and foreign jurisdictions. The guidance is effective for the Company beginning in the fourth quarter of fiscal year 2026. The Company expects the new guidance will have an immaterial impact on its consolidated financial statements, and intends to adopt the guidance prospectively when it becomes effective in the fourth quarter of fiscal year 2026. In November 2023, the FASB issued ASU 2023-07 "Segment Reporting - Improvements to Reportable Segment Disclosures", which updates reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses and information used to assess segment performance. The guidance is effective for the Company beginning in the fourth quarter of fiscal year 2025, with early adoption permitted. The Company is currently assessing the impact of ASU 2023-07 on its consolidated financial statements, and intends to adopt the guidance retrospectively when it becomes effective in the fourth quarter of fiscal year 2025.
Fair Value Measurement	Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact, and it considers assumptions that market participants would use when pricing the asset or liability. The accounting guidance for fair value establishes a fair value hierarchy based on the level of independent, objective evidence surrounding the inputs used to measure fair value. A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The fair value hierarchy is as follows: Level 1 - Applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities. There were no balances classified as level 1 in the fair value hierarchy as of June 28, 2024 and March 31, 2024. Level 2 - Applies to assets or liabilities for which there are inputs other than quoted prices included within level 1 that are observable for the asset or liability such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical assets or liabilities in markets with insufficient volume or infrequent transactions (less active markets) such as cash and cash equivalents and money market funds; or model-derived valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data. The Company values foreign exchange forward contracts using level 2 observable inputs which primarily consist of an income approach based on the present value of the forward rate less the contract rate multiplied by the notional amount. The Company’s cash equivalents include bank time deposits and money market funds, which are valued using level 2 inputs, such as interest rates and maturity periods. Due to their short-term nature, their carrying amount approximates fair value. The Company has deferred compensation plans for its officers and certain other employees. Amounts deferred under the plans are invested in hypothetical investments selected by the participant or the participant's investment manager. The Company's deferred compensation plan assets are included in other non-current assets on the consolidated balance sheets and include money market funds, mutual funds, corporate and government bonds and certain convertible securities that are valued using prices obtained from various pricing sources. These sources price these investments using certain market indices and the performance of these investments in relation to these indices. As a result, the Company has classified these investments as level 2 in the fair value hierarchy. Level 3 - Applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities.