Significant Accounting Policies (Policies)	12 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The Company prepares its consolidated financial statements in accordance with U.S. GAAP. The consolidated financial statements include the accounts of Microchip and its majority-owned and controlled subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. All dollar amounts in the financial statements and tables in these notes, except per share amounts, are stated in millions of U.S. dollars unless otherwise noted.
Revenue Recognition	Revenue Recognition The Company generates revenue primarily from sales of semiconductor products to distributors and non-distributor customers (direct customers) and, to a lesser extent, from royalties paid by licensees of intellectual property. The Company applies the following five-step approach to determine the timing and amount of revenue recognition: (i) identify the contract with the customer, (ii) identify performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when the performance obligations are satisfied. Sales of semiconductor products to customers are governed by a purchase order, an order acknowledgment, and a distributor agreement in the case of the Company's distributor customers. Sales to customers do not meet the definition of a contract until the customer has sent in a purchase order, the Company has acknowledged the order, the Company has deemed the collectability of the consideration to be probable, and legally enforceable rights and obligations have been created. As is customary in the semiconductor industry, the Company offers price concessions and stock rotation rights to many of its distributors. As these are forms of variable consideration, the Company estimates the amount of consideration to which they will be entitled using recent historical data and applying the expected value method. Generally, the transaction price associated with contracts with direct customers is set at the standalone selling price and is not variable. The transaction price is net of all taxes imposed on and concurrent with specific revenue-producing transactions. After the transaction price has been determined and allocated to the performance obligations, the Company recognizes revenue when the performance obligations are satisfied. Substantially all of the revenue generated from contracts with customers is recognized at, or near to, the time risk and title of the inventory transfers to the customer. The Company entered into LTSAs with certain of its customers that purchase through distributors or directly from the Company. Under these LTSAs, the Company receives an upfront deposit and minimum purchase commitments from the customer in exchange for assured supply over the contract period, which typically ranges from three to five years. If the customer meets the minimum purchase commitments defined in the contract, the Company returns the deposit to the customer. If not, the Company may retain all, or a portion of the deposit which will be recognized as revenue as the remaining performance obligations under the LTSAs are satisfied. The upfront deposits collected by the Company are recorded as deferred revenue in accrued liabilities or other long-term liabilities depending on the expected timing of the satisfaction of the underlying performance obligations. Revenue generated from licensees is governed by licensing agreements. The Company's primary performance obligation related to these agreements is to provide the licensee the right to use the intellectual property. The final transaction price is determined by multiplying the usage of the license by the royalty, which is fixed in the licensing agreement. Revenue is recognized as usage of the license occurs.
Research and Development	Research and Development Research and development costs are expensed as incurred. Assets purchased to support the Company's ongoing research and development activities are capitalized when related to products which have achieved technological feasibility or that have alternative future uses and are amortized over their estimated useful lives. Renewals or extensions of these assets are expensed as incurred. Research and development expenses include expenditures for labor, share-based payments, depreciation, masks, prototype wafers, and expenses for development of process technologies, new packages, and software to support new products and design environments.
Foreign Currency Translation	Foreign Currency Translation Substantially all of the Company's foreign subsidiaries are considered to be extensions of the U.S. company and any translation gains and losses related to these subsidiaries are included in other income (loss), net in the consolidated statements of income. As the U.S. dollar is utilized as the functional currency, gains and losses resulting from foreign currency transactions (transactions denominated in a currency other than the subsidiaries' functional currency) are also included in income.
Income Taxes	Income Taxes As part of the process of preparing its consolidated financial statements, the Company is required to record its income taxes in each of the jurisdictions in which it operates. Various taxing authorities in the U.S. and other countries in which the Company does business may scrutinize the tax structures employed by businesses. Companies of a similar size and complexity as the Company are regularly audited by the taxing authorities in the jurisdictions in which they conduct significant operations. During the fiscal year ended March 31, 2024, various jurisdictions finalized their audits for certain periods. The close of these audits did not have a material adverse impact on the financial statements. The Company is currently being audited by the tax authorities in the United States and various foreign jurisdictions for other periods. At this time, the Company does not know what the outcome of these audits will be. The Company records benefits for uncertain tax positions based on an assessment of whether it is more likely than not that the tax positions will be sustained based on their technical merits under currently enacted law. If this threshold is not met, no tax benefit of the uncertain tax position is recognized. If the threshold is met, the Company recognizes the largest amount of the tax benefit that is more than 50% likely to be realized upon ultimate settlement. The accounting model related to the valuation of uncertain tax positions requires the Company to presume that the tax position will be examined by the relevant taxing authority that has full knowledge of all relevant information and that each tax position will be evaluated without consideration of the possibility of offset or aggregation with other positions. The recognition requirement for the liability exists even if the Company believes the possibility of examination by a taxing authority or discovery of the related risk matters is remote or where it has a long history of the taxing authority not performing an exam or overlooking an issue. The Company will record an adjustment to a previously recorded position if new information or facts related to the position are identified in a subsequent period. Generally, adjustments to the positions are recorded through the income statement. Generally, adjustments will be recorded in periods subsequent to the initial recognition in light of changing facts and circumstances, such as the closing of a tax audit, the closing of a statutory audit period or changes in applicable law. Due to the inherent uncertainty in the estimation process, including the complexity involved to interpret and apply tax laws, and in consideration of the criteria of the accounting model, amounts recognized in the financial statements in periods subsequent to the initial recognition may significantly differ from the estimated exposure of the position under the accounting model. In December 2017, the TCJA was enacted into law and established a new provision designed to tax low-taxed income of foreign subsidiaries known as global intangible low-taxed income (GILTI). The FASB allows taxpayers to make an accounting policy election of either (i) treating taxes due on GILTI inclusions as a current-period expense when incurred or (ii) recognizing deferred taxes for temporary basis differences that are expected to reverse as GILTI in future years. The Company has made a policy choice to include taxes due on the future GILTI inclusion in taxable income when incurred. Beginning in fiscal 2023, the TCJA eliminates the option to currently deduct R&D costs in the year incurred for tax purposes and requires that all U.S. and non-U.S. based R&D expenditures be capitalized and amortized over a five-year and fifteen-year period, respectively. Although it is possible that the U.S. Congress may defer, modify, or repeal this provision, potentially with retroactive effect, the Company has no assurance that the U.S. Congress will take any action with respect to this provision. Absent any changes to the legislation, cash taxes are expected to increase for several years. The increase to the cash taxes is not expected to have an adverse effect to the Company’s liquidity. The actual impact on cash generated from operations will depend on the amount of R&D costs incurred by the Company, on whether the U.S. Congress modifies or repeals this provision, and on whether new guidance and interpretive rules are issued by the U.S. Department of the Treasury, among other factors.
Cash and Cash Equivalents	Cash and Cash Equivalents All highly liquid investments, including marketable securities with an original maturity to the Company of three months or less when acquired are considered to be cash equivalents.
Inventories	Inventories Inventories are valued at the lower of cost or net realizable value using the first-in, first-out method. Inventory costs generally consist of material, labor, depreciation and overhead costs. The Company records a charge to cost of sales to write down its inventory for estimated excess, obsolete or unmarketable inventory in an amount equal to the difference between the cost of inventory and the estimated net realizable value based upon assumptions about future demand and market conditions. If actual market conditions are less favorable than those projected by the Company, additional inventory write-downs may be required. Inventory impairment charges establish a new cost basis for inventory and charges are not subsequently reversed to income even if circumstances later suggest that increased carrying amounts are recoverable. In determining whether there is a risk of excess or obsolete inventory, the Company evaluates projected demand over periods that align with demand forecasts used to develop manufacturing plans and inventory build decisions and writes down inventory on hand that is in excess of estimated demand. Management reviews and adjusts the estimates as appropriate based on specific situations. For example, demand can be adjusted up for new products for which historic sales are not representative of future demand. Alternatively, demand can be adjusted down to the extent any existing products are being replaced or discontinued. The valuation of inventory includes determining which fixed production overhead costs can be included in inventory based on the normal operating capacity of the Company's manufacturing facilities. In periods where the Company's production levels are substantially below normal operating capacity, unabsorbed overhead production costs associated with the reduced production levels of the Company's manufacturing facilities are charged directly to cost of sales.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost. Major renewals and improvements are capitalized, while maintenance and repairs are expensed when incurred. The Company's property and equipment accounting policies incorporate estimates, assumptions and judgments relative to the useful lives of its property and equipment. Depreciation is provided for assets placed in service on a straight-line basis over the estimated useful lives of the relative assets, which range from 10 to 30 years for buildings and building improvements and 5 to 7 years for machinery and equipment. The Company evaluates the carrying value of its property and equipment when events or changes in circumstances indicate that the carrying value of such assets may be impaired. Asset impairment evaluations are, by nature, highly subjective.
Leases	Leases The Company determines if an arrangement is a lease at its inception. Operating lease arrangements are comprised primarily of real estate and equipment agreements for which the ROU assets are included in other assets and the corresponding lease liabilities, depending on their maturity, are included in accrued liabilities or other long-term liabilities in the consolidated balance sheets. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Operating lease ROU assets also include any initial direct costs and prepayments less lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. As the Company's leases generally do not provide an implicit rate, the Company uses its collateralized incremental borrowing rate based on the information available at the lease commencement date, including lease term, in determining the present value of lease payments. Lease expense for these leases is recognized on a straight-line basis over the lease term.
Debt	Debt The Company presents short-term debt obligations, which include debt obligations with a contractual maturity within 12 months of the balance sheet date and Convertible Debt that is convertible as of the balance sheet date, as long-term debt on the consolidated balance sheets when the Company has the intent and ability to utilize proceeds from its Revolving Credit Facility to refinance such debt on a long-term basis. Discounts and issuance costs directly related to the issuance of debt are amortized over the term as interest expense under the effective interest rate method or on a straight-line basis in the case of the Company's Revolving Credit Facility. After the adoption of ASU 2020-06-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity, on April 1, 2022, the Company accounts for its Convertible Debt as a single liability with no separate accounting for embedded conversion features. The Company accounts for privately negotiated settlements of its Convertible Debt as induced conversions, resulting in an inducement loss measured as the difference between the fair value of the consideration transferred and the fair value of the original terms of the instrument on the acceptance date. The remaining consideration transferred, after reducing the carrying amount of the Convertible Debt, is recorded as a reduction to additional paid-in-capital on the Company’s consolidated balance sheets. Prior to conversion of its Convertible Debt, the Company includes, in the diluted net income per common share calculation, the effect of the additional shares that may be issued when the Company's common stock price exceeds the conversion price using the if-converted method. The Company's Convertible Debt has no impact on diluted net income per common share unless the average price of the Company's common stock exceeds the conversion price because the Company is required to settle the principal amount of the Convertible Debt in cash upon conversion. Prior to the adoption of ASU 2020-06, the Company separately accounted for the liability and equity components of its Convertible Debt by estimating the fair values of the (i) liability component without a conversion feature and (ii) the conversion feature. This resulted in a bifurcation of a component of the debt, classification of that component in equity and the accretion of the resulting discount on the debt to be recognized as part of interest expense in the Company's consolidated statements of income. Upon settlement of Convertible Debt instruments, the Company allocated the total consideration between the liability and equity components based on the fair value of the liability component without the conversion feature. The difference between the consideration allocated to the liability component and the net carrying value of the liability component was recognized as an extinguishment loss or gain. The remaining settlement consideration was allocated to the equity component and recognized as a reduction of additional paid-in capital in the Company's consolidated balance sheets. In addition, if the terms of the settlement were different from the contractual terms of the original instrument, the Company recognized an inducement loss, which was measured as the difference between the fair value of the original terms of the instrument and the fair value of the settlement terms. The Company included the dilutive effect of the shares of its common stock issuable upon conversion of the outstanding Convertible Debt under the treasury stock method as it had the intent and had adopted an accounting policy to settle the principal amount of its Convertible Debt in cash. This method resulted in incremental dilutive shares when the average price of the Company's common stock for a reporting period exceeded the conversion prices per share.
Defined Benefit Pension Plans	Defined Benefit Pension Plans The Company maintains defined benefit pension plans, covering certain of its foreign employees. For financial reporting purposes, net periodic pension costs and pension obligations are determined based upon a number of actuarial assumptions, including discount rates for plan obligations, and assumed rates of compensation increases for employees participating in plans. These assumptions are based upon management's judgment and consultation with actuaries, considering all known trends and uncertainties.
Contingencies	Contingencies In the ordinary course of business, the Company is exposed to various liabilities as a result of contracts, product liability, customer claims and other matters. Additionally, the Company is involved in a limited number of legal actions, both as plaintiff and defendant. Consequently, the Company could incur uninsured liability in any of those actions. The Company also periodically receives notifications from various third parties alleging infringement of patents or other intellectual property rights, or from customers requesting reimbursement for various costs. With respect to pending legal actions to which the Company is a party and other claims, although the outcomes are generally not determinable, the Company believes that the ultimate resolution of these matters will not have a material adverse effect on its financial position, cash flows or results of operations. Litigation and disputes relating to the semiconductor industry are not uncommon, and the Company is, from time to time, subject to such litigation and disputes. As a result, no assurances can be given with respect to the extent or outcome of any such litigation or disputes in the future. The Company accrues for claims and contingencies when losses become probable and reasonably estimable. As of the end of each applicable reporting period, the Company reviews each of its matters and, where it is probable that a liability has been or will be incurred, it accrues for all probable and reasonably estimable losses. Where the Company can reasonably estimate a range of losses it may incur regarding such a matter, it records an accrual for the amount within the range that constitutes its best estimate. If the Company can reasonably estimate a range but no amount within the range appears to be a better estimate than any other, it uses the amount that is the low end of such range.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company's intangible assets include goodwill and other intangible assets. Goodwill is recorded when the purchase price paid for an acquisition exceeds the estimated fair value of the net identified tangible and intangible assets acquired. Other intangible assets include existing technologies, core and developed technology, in-process research and development, trademarks and trade names, distribution rights and customer-related intangibles. In-process research and development is capitalized until such time as the related projects are completed or abandoned at which time the capitalized amounts will begin to be amortized or written off. Indefinite-lived intangible assets consist of goodwill and in-process research and development intangible assets that have not yet been placed in service. All other intangible assets are definite-lived intangible assets, including in-process research and development assets that have been placed in service, and are amortized over their respective estimated lives, ranging from 1 to 15 years. The Company is required to perform an impairment review of indefinite-lived intangible assets, including goodwill annually, and more frequently under certain circumstances. Indefinite-lived intangible assets are subjected to this annual impairment test during the fourth quarter of the Company's fiscal year. The Company engages primarily in the development, manufacture and sale of semiconductor products as well as technology licensing. As a result, the Company concluded there are two reporting units, semiconductor products and technology licensing. The Company's impairment evaluation consists of a qualitative impairment assessment in which management evaluates whether it is more likely than not that the indefinite-lived intangible assets are impaired. If it is determined that it is more likely than not, the Company performs a quantitative impairment test, which compares the fair value of the reporting unit or indefinite-lived intangible asset to its carrying value. If the Company determines through the impairment process that the indefinite-lived intangible asset has been impaired, the Company will record the impairment charge in its results of operation. Through March 31, 2024, the Company has never recorded a goodwill impairment charge. In the event that facts and circumstances indicate definite-lived intangible assets may be impaired, the Company evaluates the recoverability and estimated useful lives of such assets. If such indicators are present, recoverability is evaluated based on whether the sum of the estimated undiscounted cash flows attributable to the asset (group) in question is less than their carrying value. If less, the Company measures the fair value of the asset (group) and recognizes an impairment loss if the carrying amount of the assets exceeds their respective fair values.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company assesses whether indicators of impairment of long-lived assets are present. If such indicators are present, the Company determines whether the sum of the estimated undiscounted cash flows attributable to the assets in question is less than their carrying value. If less, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their respective fair values. Fair value is determined by discounted future cash flows, appraisals or other methods. If the assets determined to be impaired are to be held and used, the Company recognizes an impairment loss through a charge to operating results to the extent the present value of anticipated net cash flows attributable to the asset are less than the asset's carrying value. The Company would depreciate the remaining value over the remaining estimated useful life of the asset.
Government Incentives	Government Incentives The Company receives government incentives for qualifying capital investments, research and development, and other activities as defined by the relevant government entities awarding the grants. Government grants, including non-income tax incentives, are recognized when there is reasonable assurance that the grant will be received and the Company will comply with the conditions specified in the grant agreement. The Company records capital-related grants as a reduction to property, plant and equipment within the consolidated balance sheets and recognizes a reduction to depreciation expense over the useful life of the corresponding asset. The Company records operating grants as a reduction to expense in the same line item on the consolidated statements of income as the expenditure for which the grant is intended to compensate. As of March 31, 2024, the Company recorded $126.5 million of capital-related grants as a reduction to property, plant and equipment with a corresponding offset of $93.2 million within other assets and $27.3 million as a reduction to income taxes payable within accrued liabilities on the consolidated balance sheets. The Company recognized an immaterial benefit to operating income for operating grants and the reduction of depreciation expense for capital-related grants in each of fiscal 2024 and 2023.
Share-Based Compensation	Share-Based Compensation The Company has equity incentive plans under which non-qualified stock options and RSUs have been granted to employees and non-employee members of the Board of Directors. The Company uses RSUs with a service condition as its primary equity incentive compensation instrument for employees and also grants performance-based PSUs to executive officers and employees. The Company also has employee stock purchase plans for eligible employees. Share-based compensation cost for RSUs with a service condition or performance-based PSUs is measured on the grant date based on the fair market value of the Company’s common stock discounted for expected future dividends and is recognized as expense on a straight-line attribution method over the requisite service periods, with forfeitures recognized as they occur. Share-based compensation cost for performance-based PSUs is recognized if and when the Company concludes that it is probable that the performance condition will be achieved. The Company reassesses the probability of the performance condition at each reporting period and a cumulative catch-up adjustment is recorded to share-based compensation cost for any change in the probability assessment. If there are any modifications of the underlying unvested securities, the Company may be required to accelerate or increase any remaining unearned share-based compensation expense. Prior to fiscal 2023, the Company granted market-based PSUs to executive officers. As of March 31, 2024, the remaining unearned share-based compensation expense related to market-based PSUs was immaterial.
Treasury Shares	Treasury Shares From time to time, the Company repurchases shares of its common stock in the open market or in privately negotiated transactions. Shares repurchased are recorded at cost, inclusive of fees, commissions, taxes and other expenses. Treasury shares are re-issued on a first-in, first-out basis to fund share issuance requirements under the Company's equity incentive plans.
Concentrations of Credit Risk	Concentrations of Credit Risk The Company is subject to counterparty risks from financial institutions and customers. Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash deposits in excess of federally insured limits and accounts receivables. The Company manages credit risk exposure for cash deposits by limiting counterparties to high-grade financial institutions. Concentrations of credit risk with respect to accounts receivable are generally not significant due to the diversity of the Company's customers and geographic sales areas. The Company sells its products primarily to OEMs and distributors in the Americas, Europe and Asia. The Company performs ongoing credit evaluations of its customers' financial condition and, as deemed necessary, may require collateral, primarily letters of credit. With the exception of Arrow Electronics, the Company's largest distributor, which accounted for 13% of the accounts receivable balance as of March 31, 2024 and March 31, 2023, no other customer accounted for more than 10% of the accounts receivable balance for the periods presented. Distributor advances in the consolidated balance sheets, totaled $413.2 million and $293.6 million at March 31, 2024 and March 31, 2023, respectively. On sales to distributors, the Company's payment terms generally require the distributor to settle amounts owed to the Company for an amount in excess of their ultimate cost. The Company's sales price to its distributors may be higher than the amount that the distributors will ultimately owe the Company because distributors often negotiate price reductions after purchasing the products from the Company and such reductions are often significant. It is the Company's practice to apply these negotiated price discounts to future purchases, requiring the distributor to settle receivable balances, on a current basis, generally within 30 days, for amounts originally invoiced. This practice has an adverse impact on the working capital of the Company's distributors. As such, the Company has entered into agreements with certain distributors whereby it advances cash to the distributors to reduce the distributors' working capital requirements. The Company provides these advances based on a negotiated percentage of the amount of inventory held by the distributor. Such advances have no impact on revenue recognition or the Company's consolidated statements of income. The terms of these advances are set forth in binding legal agreements and are unsecured, bear no interest on unsettled balances and are due upon demand. The agreements governing these advances can be canceled by the Company at any time and, upon cancellation, the amounts are due to the Company.
Use of Estimates	Use of Estimates The Company has made a number of estimates and assumptions relating to the reporting of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities to prepare its consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates.
Business Segments	Business Segments Operating segments are components of an enterprise about which separate financial information is regularly reviewed by the chief operating decision maker (CODM) to assess the performance of the component and make decisions about the resources to be allocated to the component. The Company's President and Chief Executive Officer has been identified as the CODM. Based on the Company's structure and manner in which the Company is managed and decisions are made, the Company's business is made up of two operating segments, semiconductor products and technology licensing. In the semiconductor products segment, the Company designs, develops, manufactures and markets mixed-signal microcontrollers, development tools and analog, interface, mixed-signal, timing, wired and wireless connectivity devices, and memory products. Under the leadership of the CODM, the Company is structured and organized around standardized roles and responsibilities based on product groups and functional activities. The Company's product groups are responsible for product research, design and development. The Company's functional activities include sales, marketing, manufacturing, information technology, human resources, legal and finance. The Company's product groups have similar products, production processes, types of customers and methods for distribution. In addition, the tools and technologies used in the design and manufacture of the Company's products are shared among the various product groups. The Company's product group leaders, under the direction of the CODM, define the product roadmaps and team with sales personnel to achieve design wins and revenue and other performance targets. Product group leaders also interact with manufacturing and operational personnel who are responsible for the production, prioritization and planning of the Company's manufacturing capabilities to help ensure the efficiency of the Company's operations and fulfillment of customer requirements. This centralized structure supports a global operating strategy in which the CODM assesses performance and allocates resources based on the Company's consolidated results.
Subsequent Events	Subsequent Events The Company evaluated events after March 31, 2024, and through the date the financial statements were issued, and determined any events or transactions occurring during this period that would require recognition or disclosure are appropriately addressed in these financial statements.
Recently Adopted Accounting Pronouncements	Recently Issued Accounting Pronouncements Not Yet Adopted In November 2023, the FASB issued ASU 2023-07-Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires public entities to disclose significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, and an amount and description of the composition of other segment items to reconcile to segment profit or loss. The amendments in this update also expand the interim segment disclosure requirements. ASU 2023-07 is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted with retrospective application required for all prior periods presented in the financial statements. The Company is currently evaluating the applicable disclosures. In December 2023, the FASB issued ASU 2023-09-Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which modifies the rules on income tax disclosures to enhance the transparency and decision-usefulness of income tax disclosures, particularly in the rate reconciliation table and disclosures about income taxes paid. The amendments are intended to address investors’ requests for income tax disclosures that provide more information to help them better understand an entity’s exposure to potential changes in tax laws and the ensuing risks and opportunities and to assess income tax information that affects cash flow forecasts and capital allocation decisions. The guidance also eliminates certain existing disclosure requirements related to uncertain tax positions and unrecognized deferred tax liabilities. ASU 2023-09 is effective for public business entities for annual periods beginning after December 15, 2024 with early adoption permitted. All entities should apply the guidance prospectively but have the option to apply it retrospectively. The Company is continuing to assess the timing of adoption and the potential impacts of ASU 2023-09.

Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2024

The Company prepares its consolidated financial statements in accordance with U.S. GAAP. The consolidated financial statements include the accounts of Microchip and its majority-owned and controlled subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. All dollar amounts in the financial statements and tables in these notes, except per share amounts, are stated in millions of U.S. dollars unless otherwise noted.

Revenue Recognition

The Company generates revenue primarily from sales of semiconductor products to distributors and non-distributor customers (direct customers) and, to a lesser extent, from royalties paid by licensees of intellectual property. The Company applies the following five-step approach to determine the timing and amount of revenue recognition: (i) identify the contract with the customer, (ii) identify performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when the performance obligations are satisfied.

Sales of semiconductor products to customers are governed by a purchase order, an order acknowledgment, and a distributor agreement in the case of the Company's distributor customers. Sales to customers do not meet the definition of a contract until the customer has sent in a purchase order, the Company has acknowledged the order, the Company has deemed the collectability of the consideration to be probable, and legally enforceable rights and obligations have been created. As is customary in the semiconductor industry, the Company offers price concessions and stock rotation rights to many of its distributors. As these are forms of variable consideration, the Company estimates the amount of consideration to which they will be entitled using recent historical data and applying the expected value method. Generally, the transaction price associated with contracts with direct customers is set at the standalone selling price and is not variable. The transaction price is net of all taxes imposed on and concurrent with specific revenue-producing transactions. After the transaction price has been determined and allocated to the performance obligations, the Company recognizes revenue when the performance obligations are satisfied. Substantially all of the revenue generated from contracts with customers is recognized at, or near to, the time risk and title of the inventory transfers to the customer.

The Company entered into LTSAs with certain of its customers that purchase through distributors or directly from the Company. Under these LTSAs, the Company receives an upfront deposit and minimum purchase commitments from the customer in exchange for assured supply over the contract period, which typically ranges from three to five years. If the customer meets the minimum purchase commitments defined in the contract, the Company returns the deposit to the customer. If not, the Company may retain all, or a portion of the deposit which will be recognized as revenue as the remaining performance obligations under the LTSAs are satisfied. The upfront deposits collected by the Company are recorded as deferred revenue in accrued liabilities or other long-term liabilities depending on the expected timing of the satisfaction of the underlying performance obligations.

Revenue generated from licensees is governed by licensing agreements. The Company's primary performance obligation related to these agreements is to provide the licensee the right to use the intellectual property. The final transaction price is determined by multiplying the usage of the license by the royalty, which is fixed in the licensing agreement. Revenue is recognized as usage of the license occurs.

Research and Development

Research and development costs are expensed as incurred. Assets purchased to support the Company's ongoing research and development activities are capitalized when related to products which have achieved technological feasibility or that have alternative future uses and are amortized over their estimated useful lives. Renewals or extensions of these assets are expensed as incurred. Research and development expenses include expenditures for labor, share-based payments, depreciation, masks, prototype wafers, and expenses for development of process technologies, new packages, and software to support new products and design environments.

Foreign Currency Translation

Substantially all of the Company's foreign subsidiaries are considered to be extensions of the U.S. company and any translation gains and losses related to these subsidiaries are included in other income (loss), net in the consolidated statements of income. As the U.S. dollar is utilized as the functional currency, gains and losses resulting from foreign currency transactions (transactions denominated in a currency other than the subsidiaries' functional currency) are also included in income.

Income Taxes

As part of the process of preparing its consolidated financial statements, the Company is required to record its income taxes in each of the jurisdictions in which it operates.

Various taxing authorities in the U.S. and other countries in which the Company does business may scrutinize the tax structures employed by businesses. Companies of a similar size and complexity as the Company are regularly audited by the taxing authorities in the jurisdictions in which they conduct significant operations. During the fiscal year ended March 31, 2024, various jurisdictions finalized their audits for certain periods. The close of these audits did not have a material adverse impact on the financial statements. The Company is currently being audited by the tax authorities in the United States and various foreign jurisdictions for other periods. At this time, the Company does not know what the outcome of these audits will be. The Company records benefits for uncertain tax positions based on an assessment of whether it is more likely than not that the tax positions will be sustained based on their technical merits under currently enacted law. If this threshold is not met, no tax benefit of the uncertain tax position is recognized. If the threshold is met, the Company recognizes the largest amount of the tax benefit that is more than 50% likely to be realized upon ultimate settlement.

The accounting model related to the valuation of uncertain tax positions requires the Company to presume that the tax position will be examined by the relevant taxing authority that has full knowledge of all relevant information and that each tax position will be evaluated without consideration of the possibility of offset or aggregation with other positions. The recognition requirement for the liability exists even if the Company believes the possibility of examination by a taxing authority or discovery of the related risk matters is remote or where it has a long history of the taxing authority not performing an exam or overlooking an issue. The Company will record an adjustment to a previously recorded position if new information or facts related to the position are identified in a subsequent period. Generally, adjustments to the positions are recorded through the income statement. Generally, adjustments will be recorded in periods subsequent to the initial recognition in light of changing facts and circumstances, such as the closing of a tax audit, the closing of a statutory audit period or changes in applicable law. Due to the inherent uncertainty in the estimation process, including the complexity involved to interpret and apply tax laws, and in consideration of the criteria of the accounting model, amounts recognized in the financial statements in periods subsequent to the initial recognition may significantly differ from the estimated exposure of the position under the accounting model.

In December 2017, the TCJA was enacted into law and established a new provision designed to tax low-taxed income of foreign subsidiaries known as global intangible low-taxed income (GILTI). The FASB allows taxpayers to make an accounting policy election of either (i) treating taxes due on GILTI inclusions as a current-period expense when incurred or (ii) recognizing deferred taxes for temporary basis differences that are expected to reverse as GILTI in future years. The Company has made a policy choice to include taxes due on the future GILTI inclusion in taxable income when incurred.

Beginning in fiscal 2023, the TCJA eliminates the option to currently deduct R&D costs in the year incurred for tax purposes and requires that all U.S. and non-U.S. based R&D expenditures be capitalized and amortized over a five-year and fifteen-year period, respectively. Although it is possible that the U.S. Congress may defer, modify, or repeal this provision, potentially with retroactive effect, the Company has no assurance that the U.S. Congress will take any action with respect to this provision. Absent any changes to the legislation, cash taxes are expected to increase for several years. The increase to the cash taxes is not expected to have an adverse effect to the Company’s liquidity. The actual impact on cash generated

from operations will depend on the amount of R&D costs incurred by the Company, on whether the U.S. Congress modifies or repeals this provision, and on whether new guidance and interpretive rules are issued by the U.S. Department of the Treasury, among other factors.

Cash and Cash Equivalents

All highly liquid investments, including marketable securities with an original maturity to the Company of three months or less when acquired are considered to be cash equivalents.

Inventories

Inventories are valued at the lower of cost or net realizable value using the first-in, first-out method. Inventory costs generally consist of material, labor, depreciation and overhead costs. The Company records a charge to cost of sales to write down its inventory for estimated excess, obsolete or unmarketable inventory in an amount equal to the difference between the cost of inventory and the estimated net realizable value based upon assumptions about future demand and market conditions. If actual market conditions are less favorable than those projected by the Company, additional inventory write-downs may be required. Inventory impairment charges establish a new cost basis for inventory and charges are not subsequently reversed to income even if circumstances later suggest that increased carrying amounts are recoverable. In determining whether there is a risk of excess or obsolete inventory, the Company evaluates projected demand over periods that align with demand forecasts used to develop manufacturing plans and inventory build decisions and writes down inventory on hand that is in excess of estimated demand. Management reviews and adjusts the estimates as appropriate based on specific situations. For example, demand can be adjusted up for new products for which historic sales are not representative of future demand. Alternatively, demand can be adjusted down to the extent any existing products are being replaced or discontinued.

The valuation of inventory includes determining which fixed production overhead costs can be included in inventory based on the normal operating capacity of the Company's manufacturing facilities. In periods where the Company's production levels are substantially below normal operating capacity, unabsorbed overhead production costs associated with the reduced production levels of the Company's manufacturing facilities are charged directly to cost of sales.

Property, Plant and Equipment

Property, plant and equipment are stated at cost. Major renewals and improvements are capitalized, while maintenance and repairs are expensed when incurred. The Company's property and equipment accounting policies incorporate estimates, assumptions and judgments relative to the useful lives of its property and equipment. Depreciation is provided for assets placed in service on a straight-line basis over the estimated useful lives of the relative assets, which range from 10 to 30 years for buildings and building improvements and 5 to 7 years for machinery and equipment. The Company evaluates the carrying value of its property and equipment when events or changes in circumstances indicate that the carrying value of such assets may be impaired. Asset impairment evaluations are, by nature, highly subjective.

Leases

The Company determines if an arrangement is a lease at its inception. Operating lease arrangements are comprised primarily of real estate and equipment agreements for which the ROU assets are included in other assets and the corresponding lease liabilities, depending on their maturity, are included in accrued liabilities or other long-term liabilities in the consolidated balance sheets.

Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Operating lease ROU assets also include any initial direct costs and prepayments less lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options.

As the Company's leases generally do not provide an implicit rate, the Company uses its collateralized incremental borrowing rate based on the information available at the lease commencement date, including lease term, in determining the present value of lease payments. Lease expense for these leases is recognized on a straight-line basis over the lease term.

Debt

The Company presents short-term debt obligations, which include debt obligations with a contractual maturity within 12 months of the balance sheet date and Convertible Debt that is convertible as of the balance sheet date, as long-term debt on the consolidated balance sheets when the Company has the intent and ability to utilize proceeds from its Revolving Credit Facility to refinance such debt on a long-term basis. Discounts and issuance costs directly related to the issuance of debt are amortized over the term as interest expense under the effective interest rate method or on a straight-line basis in the case of the Company's Revolving Credit Facility.

After the adoption of ASU 2020-06-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity, on April 1, 2022, the Company accounts for its Convertible Debt as a single liability with no separate accounting for embedded conversion features. The Company accounts for privately negotiated settlements of its Convertible Debt as induced conversions, resulting in an inducement loss measured as the difference between the fair value of the consideration transferred and the fair value of the original terms of the instrument on the acceptance date. The remaining consideration transferred, after reducing the carrying amount of the Convertible Debt, is recorded as a reduction to additional paid-in-capital on the Company’s consolidated balance sheets. Prior to conversion of its Convertible Debt, the Company includes, in the diluted net income per common share calculation, the effect of the additional shares that may be issued when the Company's common stock price exceeds the conversion price using the if-converted method. The Company's Convertible Debt has no impact on diluted net income per common share unless the average price of the Company's common stock exceeds the conversion price because the Company is required to settle the principal amount of the Convertible Debt in cash upon conversion.

Prior to the adoption of ASU 2020-06, the Company separately accounted for the liability and equity components of its Convertible Debt by estimating the fair values of the (i) liability component without a conversion feature and (ii) the conversion feature. This resulted in a bifurcation of a component of the debt, classification of that component in equity and the accretion of the resulting discount on the debt to be recognized as part of interest expense in the Company's consolidated statements of income. Upon settlement of Convertible Debt instruments, the Company allocated the total consideration between the liability and equity components based on the fair value of the liability component without the conversion feature. The difference between the consideration allocated to the liability component and the net carrying value of the liability component was recognized as an extinguishment loss or gain. The remaining settlement consideration was allocated to the equity component and recognized as a reduction of additional paid-in capital in the Company's consolidated balance sheets. In addition, if the terms of the settlement were different from the contractual terms of the original instrument, the Company recognized an inducement loss, which was measured as the difference between the fair value of the original terms of the instrument and the fair value of the settlement terms. The Company included the dilutive effect of the shares of its common stock issuable upon conversion of the outstanding Convertible Debt under the treasury stock method as it had the intent and had adopted an accounting policy to settle the principal amount of its Convertible Debt in cash. This method resulted in incremental dilutive shares when the average price of the Company's common stock for a reporting period exceeded the conversion prices per share.

Defined Benefit Pension Plans

The Company maintains defined benefit pension plans, covering certain of its foreign employees. For financial reporting purposes, net periodic pension costs and pension obligations are determined based upon a number of actuarial assumptions, including discount rates for plan obligations, and assumed rates of compensation increases for employees participating in plans. These assumptions are based upon management's judgment and consultation with actuaries, considering all known trends and uncertainties.

Contingencies

In the ordinary course of business, the Company is exposed to various liabilities as a result of contracts, product liability, customer claims and other matters. Additionally, the Company is involved in a limited number of legal actions, both as plaintiff and defendant. Consequently, the Company could incur uninsured liability in any of those actions. The Company also periodically receives notifications from various third parties alleging infringement of patents or other intellectual property rights, or from customers requesting reimbursement for various costs. With respect to pending legal actions to which the Company is a party and other claims, although the outcomes are generally not determinable, the Company believes that the ultimate resolution of these matters will not have a material adverse effect on its financial position, cash flows or results of operations. Litigation and disputes relating to the semiconductor industry are not uncommon, and the Company is, from time

to time, subject to such litigation and disputes. As a result, no assurances can be given with respect to the extent or outcome of any such litigation or disputes in the future.

The Company accrues for claims and contingencies when losses become probable and reasonably estimable. As of the end of each applicable reporting period, the Company reviews each of its matters and, where it is probable that a liability has been or will be incurred, it accrues for all probable and reasonably estimable losses. Where the Company can reasonably estimate a range of losses it may incur regarding such a matter, it records an accrual for the amount within the range that constitutes its best estimate. If the Company can reasonably estimate a range but no amount within the range appears to be a better estimate than any other, it uses the amount that is the low end of such range.

Goodwill and Other Intangible Assets

The Company's intangible assets include goodwill and other intangible assets. Goodwill is recorded when the purchase price paid for an acquisition exceeds the estimated fair value of the net identified tangible and intangible assets acquired. Other intangible assets include existing technologies, core and developed technology, in-process research and development, trademarks and trade names, distribution rights and customer-related intangibles. In-process research and development is capitalized until such time as the related projects are completed or abandoned at which time the capitalized amounts will begin to be amortized or written off. Indefinite-lived intangible assets consist of goodwill and in-process research and development intangible assets that have not yet been placed in service. All other intangible assets are definite-lived intangible assets, including in-process research and development assets that have been placed in service, and are amortized over their respective estimated lives, ranging from 1 to 15 years.

The Company is required to perform an impairment review of indefinite-lived intangible assets, including goodwill annually, and more frequently under certain circumstances. Indefinite-lived intangible assets are subjected to this annual impairment test during the fourth quarter of the Company's fiscal year. The Company engages primarily in the development, manufacture and sale of semiconductor products as well as technology licensing. As a result, the Company concluded there are two reporting units, semiconductor products and technology licensing. The Company's impairment evaluation consists of a qualitative impairment assessment in which management evaluates whether it is more likely than not that the indefinite-lived intangible assets are impaired. If it is determined that it is more likely than not, the Company performs a quantitative impairment test, which compares the fair value of the reporting unit or indefinite-lived intangible asset to its carrying value. If the Company determines through the impairment process that the indefinite-lived intangible asset has been impaired, the Company will record the impairment charge in its results of operation. Through March 31, 2024, the Company has never recorded a goodwill impairment charge. In the event that facts and circumstances indicate definite-lived intangible assets may be impaired, the Company evaluates the recoverability and estimated useful lives of such assets. If such indicators are present, recoverability is evaluated based on whether the sum of the estimated undiscounted cash flows attributable to the asset (group) in question is less than their carrying value. If less, the Company measures the fair value of the asset (group) and recognizes an impairment loss if the carrying amount of the assets exceeds their respective fair values.

Impairment of Long-Lived Assets

The Company assesses whether indicators of impairment of long-lived assets are present. If such indicators are present, the Company determines whether the sum of the estimated undiscounted cash flows attributable to the assets in question is less than their carrying value. If less, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their respective fair values. Fair value is determined by discounted future cash flows, appraisals or other methods. If the assets determined to be impaired are to be held and used, the Company recognizes an impairment loss through a charge to operating results to the extent the present value of anticipated net cash flows attributable to the asset are less than the asset's carrying value. The Company would depreciate the remaining value over the remaining estimated useful life of the asset.

Government Incentives

The Company receives government incentives for qualifying capital investments, research and development, and other activities as defined by the relevant government entities awarding the grants. Government grants, including non-income tax incentives, are recognized when there is reasonable assurance that the grant will be received and the Company will comply with the conditions specified in the grant agreement. The Company records capital-related grants as a reduction to property, plant and equipment within the consolidated balance sheets and recognizes a reduction to depreciation expense over the useful life of the corresponding asset. The Company records operating grants as a reduction to expense in the same line item on the consolidated statements of income as the expenditure for which the grant is intended to compensate. As of March 31, 2024, the Company recorded $126.5 million of capital-related grants as a reduction to property, plant and equipment with a

corresponding offset of $93.2 million within other assets and $27.3 million as a reduction to income taxes payable within accrued liabilities on the consolidated balance sheets. The Company recognized an immaterial benefit to operating income for operating grants and the reduction of depreciation expense for capital-related grants in each of fiscal 2024 and 2023.

Share-Based Compensation

The Company has equity incentive plans under which non-qualified stock options and RSUs have been granted to employees and non-employee members of the Board of Directors. The Company uses RSUs with a service condition as its primary equity incentive compensation instrument for employees and also grants performance-based PSUs to executive officers and employees. The Company also has employee stock purchase plans for eligible employees. Share-based compensation cost for RSUs with a service condition or performance-based PSUs is measured on the grant date based on the fair market value of the Company’s common stock discounted for expected future dividends and is recognized as expense on a straight-line attribution method over the requisite service periods, with forfeitures recognized as they occur. Share-based compensation cost for performance-based PSUs is recognized if and when the Company concludes that it is probable that the performance condition will be achieved. The Company reassesses the probability of the performance condition at each reporting period and a cumulative catch-up adjustment is recorded to share-based compensation cost for any change in the probability assessment. If there are any modifications of the underlying unvested securities, the Company may be required to accelerate or increase any remaining unearned share-based compensation expense. Prior to fiscal 2023, the Company granted market-based PSUs to executive officers. As of March 31, 2024, the remaining unearned share-based compensation expense related to market-based PSUs was immaterial.

Treasury Shares

From time to time, the Company repurchases shares of its common stock in the open market or in privately negotiated transactions. Shares repurchased are recorded at cost, inclusive of fees, commissions, taxes and other expenses. Treasury shares are re-issued on a first-in, first-out basis to fund share issuance requirements under the Company's equity incentive plans.

Concentrations of Credit Risk

The Company is subject to counterparty risks from financial institutions and customers. Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash deposits in excess of federally insured limits and accounts receivables. The Company manages credit risk exposure for cash deposits by limiting counterparties to high-grade financial institutions. Concentrations of credit risk with respect to accounts receivable are generally not significant due to the diversity of the Company's customers and geographic sales areas. The Company sells its products primarily to OEMs and distributors in the Americas, Europe and Asia. The Company performs ongoing credit evaluations of its customers' financial condition and, as deemed necessary, may require collateral, primarily letters of credit. With the exception of Arrow Electronics, the Company's largest distributor, which accounted for 13% of the accounts receivable balance as of March 31, 2024 and March 31, 2023, no other customer accounted for more than 10% of the accounts receivable balance for the periods presented.

Distributor advances in the consolidated balance sheets, totaled $413.2 million and $293.6 million at March 31, 2024 and March 31, 2023, respectively. On sales to distributors, the Company's payment terms generally require the distributor to settle amounts owed to the Company for an amount in excess of their ultimate cost. The Company's sales price to its distributors may be higher than the amount that the distributors will ultimately owe the Company because distributors often negotiate price reductions after purchasing the products from the Company and such reductions are often significant. It is the Company's practice to apply these negotiated price discounts to future purchases, requiring the distributor to settle receivable balances, on a current basis, generally within 30 days, for amounts originally invoiced. This practice has an adverse impact on the working capital of the Company's distributors. As such, the Company has entered into agreements with certain distributors whereby it advances cash to the distributors to reduce the distributors' working capital requirements. The Company provides these advances based on a negotiated percentage of the amount of inventory held by the distributor. Such advances have no impact on revenue recognition or the Company's consolidated statements of income. The terms of these advances are set forth in binding legal agreements and are unsecured, bear no interest on unsettled balances and are due upon demand. The agreements governing these advances can be canceled by the Company at any time and, upon cancellation, the amounts are due to the Company.

Use of Estimates

The Company has made a number of estimates and assumptions relating to the reporting of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities to prepare its consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates.

Business Segments

Operating segments are components of an enterprise about which separate financial information is regularly reviewed by the chief operating decision maker (CODM) to assess the performance of the component and make decisions about the resources to be allocated to the component. The Company's President and Chief Executive Officer has been identified as the CODM. Based on the Company's structure and manner in which the Company is managed and decisions are made, the Company's business is made up of two operating segments, semiconductor products and technology licensing.

In the semiconductor products segment, the Company designs, develops, manufactures and markets mixed-signal microcontrollers, development tools and analog, interface, mixed-signal, timing, wired and wireless connectivity devices, and memory products. Under the leadership of the CODM, the Company is structured and organized around standardized roles and responsibilities based on product groups and functional activities. The Company's product groups are responsible for product research, design and development. The Company's functional activities include sales, marketing, manufacturing, information technology, human resources, legal and finance.

The Company's product groups have similar products, production processes, types of customers and methods for distribution. In addition, the tools and technologies used in the design and manufacture of the Company's products are shared among the various product groups. The Company's product group leaders, under the direction of the CODM, define the product roadmaps and team with sales personnel to achieve design wins and revenue and other performance targets. Product group leaders also interact with manufacturing and operational personnel who are responsible for the production, prioritization and planning of the Company's manufacturing capabilities to help ensure the efficiency of the Company's operations and fulfillment of customer requirements. This centralized structure supports a global operating strategy in which the CODM assesses performance and allocates resources based on the Company's consolidated results.

Subsequent Events

The Company evaluated events after March 31, 2024, and through the date the financial statements were issued, and determined any events or transactions occurring during this period that would require recognition or disclosure are appropriately addressed in these financial statements.

Recently Adopted Accounting Pronouncements

Recently Issued Accounting Pronouncements Not Yet Adopted

In November 2023, the FASB issued ASU 2023-07-Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires public entities to disclose significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, and an amount and description of the composition of other segment items to reconcile to segment profit or loss. The amendments in this update also expand the interim segment disclosure requirements. ASU 2023-07 is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted with retrospective application required for all prior periods presented in the financial statements. The Company is currently evaluating the applicable disclosures.

In December 2023, the FASB issued ASU 2023-09-Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which modifies the rules on income tax disclosures to enhance the transparency and decision-usefulness of income tax disclosures, particularly in the rate reconciliation table and disclosures about income taxes paid. The amendments are intended to address investors’ requests for income tax disclosures that provide more information to help them better understand an entity’s exposure to potential changes in tax laws and the ensuing risks and opportunities and to assess income tax information that affects cash flow forecasts and capital allocation decisions. The guidance also eliminates certain existing disclosure requirements related to uncertain tax positions and unrecognized deferred tax liabilities. ASU 2023-09 is effective for public business entities for annual periods beginning after December 15, 2024 with early adoption permitted. All entities should apply the guidance prospectively but have the option to apply it retrospectively. The Company is continuing to assess the timing of adoption and the potential impacts of ASU 2023-09.