Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2014
Summary of Significant Accounting Policies
Basis of Presentation	*Basis of Presentation* The consolidated financial statements include the accounts of Logitech and its subsidiaries. All intercompany balances and transactions have been eliminated. The consolidated financial statements are presented in accordance with U.S. GAAP (accounting principles generally accepted in the United States of America).
Fiscal Year	*Fiscal Year* The Company's fiscal year ends on March 31. Interim quarters are thirteen-week periods, each ending on a Friday. For purposes of presentation, the Company has indicated its quarterly periods as ending on the month end.
Use of Estimates	*Use of Estimates* The preparation of financial statements in conformity with U.S. GAAP requires management to make judgments, estimates and assumptions that affect reported amounts of assets, liabilities, net sales and expenses, and the disclosure of contingent assets and liabilities. Examples of significant estimates and assumptions made by management involve the fair value of goodwill, warranty liabilities, accruals for discretionary customer programs, sales return reserves, allowance for doubtful accounts, inventory valuation, uncertain tax positions, and valuation allowances for deferred tax assets. Although these estimates are based on management's best knowledge of current events and actions that may impact the Company in the future, actual results could differ from those estimates.
Foreign Currencies	*Foreign Currencies* The functional currency of the Company's operations is primarily the U.S. Dollar. To a lesser extent, certain operations use the Euro, Chinese Renminbi, Swiss Franc, or other local currencies as their functional currencies. The financial statements of the Company's subsidiaries whose functional currency is other than the U.S. Dollar are translated to U.S. Dollars using period-end rates of exchange for assets and liabilities and monthly average rates for net sales, income and expenses. Cumulative translation gains and losses are included as a component of shareholders' equity in accumulated other comprehensive income/(loss). Gains and losses arising from transactions denominated in currencies other than a subsidiary's functional currency are reported in other income (expense), net in the consolidated statements of operations.
Revenue Recognition	*Revenue Recognition* Revenues are recognized when all of the following criteria are met: • evidence of an arrangement between the Company and the customer exists; • delivery has occurred and title and risk of loss has transferred to the customer; • the price of the product is fixed or determinable; and • collectability of the receivable is reasonably assured. For sales of most hardware peripherals products and hardware bundled with software incidental to its functionality, these criteria are met at the time delivery has occurred and title and risk of loss have transferred to the customer. The Company's video conferencing segment has multiple-deliverable revenue arrangements that include both undelivered software elements and hardware with software essential to its functionality. The Company uses the following hierarchy to determine the relative selling price for allocating revenue to the deliverables: (i) VSOE (vendor specific objective evidence) of fair value, if available; (ii) TPE (third party evidence), if VSOE is not available; or (iii) ESP (best estimate of selling price), if neither VSOE nor TPE are available. Management judgment must be used to determine the appropriate deliverables and associated relative selling prices. The Company has identified Logitech Revue, discontinued in fiscal year 2013, and the Lifesize video conferencing products as products sold with software components that qualify as multiple-deliverable revenue arrangements. Lifesize products include the following deliverables: • Non-software deliverables • Hardware with software essential to the functionality of the hardware device delivered at time of sale • Maintenance for hardware with essential software, including future when-and-if-available unspecified upgrades • Other services, including training and installation • Software deliverables • Non-essential software • Maintenance for non-essential software, including future when-and-if available unspecified upgrades The relative selling price for Lifesize hardware with essential software and non-essential software is based on ESP, as VSOE and TPE cannot be established due to variable price discounting. Key factors considered in developing ESP are historical selling prices of the product, pricing of substantially similar products, and other market conditions. Lifesize sells maintenance for non-essential software, maintenance for hardware with essential software, and other services on a standalone basis, and therefore has established VSOE for those deliverables. The consideration received for multiple element arrangements consisting of both non-software and software deliverables is allocated based on relative selling prices to the non-software deliverables and the software deliverables as a group. Amounts allocated to non-software-related elements, such as delivered hardware with essential software, are recognized at the time of sale provided that the other conditions for revenue recognition have been met. Amounts allocated to maintenance services for hardware and essential software are deferred and recognized ratably over the maintenance period. Amounts allocated to other services are deferred and recognized upon completion of services. Amounts allocated to software deliverables such as non-essential software and related services are further allocated to the individual deliverables within the software group. The VSOE of non-essential software-related maintenance are deferred and recognized ratably over the maintenance period. The residual value of the amounts allocated to software- related elements is recognized at the time of sale. Revenues from sales to distributors and authorized resellers are recognized upon shipment net of estimated product returns and expected payments for cooperative marketing arrangements, customer incentive programs and pricing programs. The estimated cost of these programs is recorded as a reduction of sales or as an operating expense, if the Company receives a separately identifiable benefit from the customer and can reasonably estimate the fair value of that benefit. Significant management judgment and estimates must be used to determine the cost of these programs in any accounting period. The Company grants limited rights to return product. Return rights vary by customer, and range from just the right to return defective product to stock rotation rights limited to a percentage approved by management. Estimates of expected future product returns are recognized at the time of sale based on analyses of historical return trends by customer and by product, inventories owned by and located at distributors and retailers, current customer demand, current operating conditions, and other relevant customer and product information. Upon recognition the Company reduces sales and cost of sales for the estimated return. Return trends are influenced by product life cycle status, new product introductions, market acceptance of products, sales levels, product sell-through, the type of customer, seasonality, product quality issues, competitive pressures, operational policies and procedures, and other factors. Return rates can fluctuate over time, but are sufficiently predictable to allow the Company to estimate expected future product returns. The Company enters into cooperative marketing arrangements with many of its distribution and retail customers, and with certain indirect partners, allowing customers to receive a credit equal to a set percentage of their purchases of the Company's products, or a fixed dollar credit for various marketing programs. The objective of these arrangements is to encourage advertising and promotional events to increase sales of the Company's products. Accruals for these marketing arrangements are recorded at the later of time of sale or time of commitment, based on negotiated terms, historical experience and inventory levels in the channel. Customer incentive programs include performance-based incentives and consumer rebates. The Company offers performance-based incentives to its distribution customers, retail customers and indirect partners based on pre-determined performance criteria. Accruals for performance-based incentives are recognized as a reduction of the sale price at the time of sale. Estimates of required accruals are determined based on negotiated terms, consideration of historical experience, anticipated volume of future purchases, and inventory levels in the channel. Consumer rebates are offered from time to time at the Company's discretion for the primary benefit of end-users. Accruals for the estimated costs of consumer rebates and similar incentives are recorded at the later of time of sale or when the incentive is offered, based on the specific terms and conditions. Certain incentive programs, including consumer rebates, require management to estimate the number of customers who will actually redeem the incentive based on historical experience and the specific terms and conditions of particular programs. The Company has agreements with certain of its customers that contain terms allowing price protection credits to be issued in the event of a subsequent price reduction. At management's discretion, the Company also offers special pricing discounts to certain customers. Special pricing discounts are usually offered only for limited time periods or for sales of selected products to specific indirect partners. Management's decision to make price reductions is influenced by product life cycle stage, market acceptance of products, the competitive environment, new product introductions and other factors. Accruals for estimated expected future pricing actions are recognized at the time of sale based on analyses of historical pricing actions by customer and by products, inventories owned by and located at distributors and retailers, current customer demand, current operating conditions, and other relevant customer and product information, such as stage of product life-cycle. The Company regularly evaluates the adequacy of its estimates for product returns, cooperative marketing arrangements, customer incentive programs and pricing programs. Future market conditions and product transitions may require the Company to take action to change such programs. In addition, when the variables used to estimate these costs change, or if actual costs differ significantly from the estimates, the Company would be required to record incremental increases or reductions to sales, cost of goods sold or increase operating expenses. If, at any future time, the Company becomes unable to reasonably estimate these costs, recognition of revenue might be deferred until products are sold to users, which would adversely impact sales in the period of transition. The Company's shipping and handling costs are included in cost of sales in the consolidated statements of operations for all periods presented.
Research and Development Costs	*Research and Development Costs* Costs related to research, design and development of products, which consist primarily of personnel, product design and infrastructure expenses, are charged to research and development expense as they are incurred.
Advertising Costs	*Advertising Costs* Advertising costs are expensed as incurred. Advertising costs are recorded as either a marketing and selling expense or a deduction from revenue. Advertising costs reimbursed by the Company to direct or indirect customers must have an identifiable benefit and an estimable fair value in order to be classified as an operating expense. If these criteria are not met, the cost is classified as a reduction of revenue. Advertising costs during fiscal years 2014, 2013 and 2012 were $161.2 million, $165.8 million and $168.0 million, respectively.
Cash Equivalents	*Cash Equivalents* The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents.
Concentration of Credit Risk	*Concentration of Credit Risk* Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company maintains cash and cash equivalents with various financial institutions to limit exposure with any one financial institution, but is exposed to credit risk in the event of default by financial institutions to the extent that cash balances with individual financial institutions are in excess of amounts that are insured. The Company sells to large OEMs, distributors and retailers and, as a result, maintains individually significant receivable balances with such customers. In fiscal years 2014, 2013 and 2012, one customer in the peripherals operating segment represented 14%, 11% and 14% of net sales, respectively. No other customer represented more than 10% of the Company's total net sales during fiscal years 2014, 2013 and 2012. As of both March 31, 2014 and 2013, one customer represented 14% of total accounts receivable. No other customer represented more than 10% of the Company's total accounts receivable at either March 31, 2014 or 2013. Typical payment terms require customers to pay for product sales generally within 30 to 60 days; however terms may vary by customer type, by country and by selling season. Extended payment terms are sometimes offered to a limited number of customers during the second and third fiscal quarters. The Company does not modify payment terms on existing receivables. The Company's OEM customers tend to be well-capitalized multi-national companies, while distributors and key retailers may be less well-capitalized. The Company manages its accounts receivable credit risk through ongoing credit evaluation of its customers' financial condition. The Company generally does not require collateral from its customers.
Allowances for Doubtful Accounts	*Allowances for Doubtful Accounts* Allowances for doubtful accounts are maintained for estimated losses resulting from the inability of the Company's customers to make required payments. The allowances are based on the Company's regular assessment of the credit worthiness and financial condition of specific customers, as well as its historical experience with bad debts and customer deductions, receivables aging, current economic trends, geographic or country-specific risks and the financial condition of its distribution channels.
Inventories	*Inventories* Inventories are stated at the lower of cost or market. Costs are computed under the standard cost method, which approximates actual costs determined on the first-in, first-out basis. The Company records write-downs of inventories which are obsolete or in excess of anticipated demand or market value based on a consideration of marketability and product life cycle stage, product development plans, component cost trends, demand forecasts, historical net sales, and assumptions about future demand and market conditions.
Investments	*Investments* The Company's investment securities portfolio consists of bank time deposits and marketable securities related to a deferred compensation plan. The bank time deposits are classified as cash equivalents and are recorded at cost, which approximates fair value. The marketable securities related to the deferred compensation plan are classified as non-current trading investments, as they are intended to fund the deferred compensation plan long-term liability. Trading activity is directed by plan participants and is not intended to create short-term gains for the benefit of the Company. These securities are recorded at fair value based on quoted market prices. Earnings, gains and losses on trading investments are included in other income (expense), net.
Property, Plant and Equipment	*Property, Plant and Equipment* Property, plant and equipment are stated at cost. Additions and improvements are capitalized, and maintenance and repairs are expensed as incurred. The Company capitalizes the cost of software developed for internal use in connection with major projects. Costs incurred during the feasibility stage are expensed, whereas direct costs incurred during the application development stage are capitalized. Depreciation is provided using the straight-line method. Plant and buildings are depreciated over estimated useful lives from ten to twenty-five years, equipment over useful lives from three to five years, internal-use software development over useful lives of three to seven years and leasehold improvements over the lesser of the useful life of the improvement, up to ten years, or the term of the lease. When property and equipment is retired or otherwise disposed of, the cost and accumulated depreciation are relieved from the accounts and the net gain or loss is included in the determination of other income (expense), net.
Valuation of Long-Lived Assets	*Valuation of Long-Lived Assets* The Company reviews long-lived assets, such as property and equipment, and finite-lived intangible assets, for impairment whenever events indicate that the carrying amounts might not be recoverable. Recoverability of property and equipment, and other finite-lived intangible assets is measured by comparing the projected undiscounted net cash flows associated with those assets to their carrying values. If an asset is considered impaired, it is written down to fair value, which is determined based on the asset's projected discounted cash flows or appraised value, depending on the nature of the asset. For purposes of recognition of an impairment for assets held for use, the Company groups assets and liabilities at the lowest level for which cash flows are separately identifiable.
Goodwill and Other Intangible Assets	*Goodwill and Other Intangible Assets* The Company's intangible assets principally include goodwill, acquired technology, trademarks, customer contracts, and customer relationships. Other intangible assets with finite lives, which include acquired technology, trademarks, customer contracts and customer relationships, and other are recorded at cost and amortized using the straight-line method over their useful lives ranging from one year to ten years. Intangible assets with indefinite lives, which include goodwill, are recorded at cost and evaluated at least annually for impairment. In accordance with ASC Topic 350-10 ("ASC 350-10") as it relates to Goodwill and Other Intangible Assets, the Company conducts its annual goodwill impairment analysis as of December 31 each year and as necessary if changes in facts and circumstances indicate that it is more likely than not that the fair value of its reporting units may be less than its carrying amount. Events or changes in facts and circumstances that might indicate potential impairment of goodwill include company-specific factors, including, but not limited to, stock price volatility, market capitalization relative to net book value, and projected revenue, market growth and operating results. Determining the number of reporting units and the fair value of a reporting unit requires the Company to make judgments and involves the use of significant estimates and assumptions. The Company has two reporting units: peripherals and video conferencing. The allocation of assets and liabilities to each of the reporting units also involves judgment and assumptions. FASB ASC 350-20 permits the Company to make a qualitative assessment of whether it is more likely than not that a reporting unit's fair value is less than its carrying amount before applying the two-step goodwill impairment test. If an entity concludes that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, it would not be required to perform the two-step impairment test for that reporting unit. The Company may elect to proceed directly to Step 1 without performing a qualitative assessment. Step 1 of the two-step impairment test involves measuring the recoverability of goodwill at the reporting unit level by comparing the reporting unit's carrying amount, including goodwill, to the estimated fair value of the reporting unit. The fair value is estimated using an income approach employing a discounted cash flow ("DCF") and a market-based model. The DCF model is based on projected cash flows from the Company's most recent forecast ("assessment forecast") developed in connection with each of its reporting units to perform the goodwill impairment assessment. The assessment forecast is based on a number of key assumptions, including, but not limited to, discount rate, compound annual growth rate ("CAGR") during the forecast period, and terminal value. The terminal value is based on an exit price at the end of the assessment forecast using an earnings multiple applied to the final year of the assessment forecast. The discount rate is applied to the projected cash flows to reflect the risks inherent in the timing and amount of the projected cash flows, including the terminal value, and is derived from the weighted average cost of capital of market participants in similar businesses. The market approach model is based on applying certain revenue and earnings multiples of comparable companies relevant to each of the Company's reporting units to the respective revenue and earnings metrics of its reporting units. To test the reasonableness of the fair values indicated by the income approach and the market-based approach, the Company also assess the implied premium of the aggregate fair value over the market capitalization considered attributable to an acquisition control premium, which is the price in excess of a stock market's price that investors would typically pay to gain control of an entity. The DCF model and the market approach require the exercise of significant judgment, including assumptions about appropriate discount rates, long-term growth rates for purposes of determining a terminal value at the end of the discrete forecast period, economic expectations, timing of expected future cash flows, and expectations of returns on equity that will be achieved. Such assumptions are subject to change as a result of changing economic and competitive conditions. If the carrying amount of the reporting unit exceeds its fair value as determined by these assessments, goodwill is considered impaired, and Step 2 of the analysis is performed to measure the amount of impairment loss. Step 2 measures the impairment loss by allocating the reporting unit's fair value to its assets and liabilities other than goodwill, comparing the resulting implied fair value of goodwill with its carrying amount, and recording an impairment charge for the difference.
Income Taxes	*Income Taxes* The Company provides for income taxes using the asset and liability method, which requires that deferred tax assets and liabilities be recognized for the expected future tax consequences of temporary differences resulting from differing treatment of items for tax and accounting purposes. In estimating future tax consequences, expected future events are taken into consideration, with the exception of potential tax law or tax rate changes. The Company's assessment of uncertain tax positions requires that management make estimates and judgments about the application of tax law, the expected resolution of uncertain tax positions and other matters. In the event that uncertain tax positions are resolved for amounts different than the Company's estimates, or the related statutes of limitations expire without the assessment of additional income taxes, the Company will be required to adjust the amounts of the related assets and liabilities in the period in which such events occur. Such adjustments may have a material impact on the Company's income tax provision and its results of operations.
Fair Value of Financial Instruments	*Fair Value of Financial Instruments* The carrying value of certain of the Company's financial instruments, including cash equivalents, accounts receivable and accounts payable approximates fair value due to their short maturities. The Company's trading investments related to the deferred compensation plan are reported at fair value based on quoted market prices.
Net Income (Loss) per Share	*Net Income (Loss) per Share* Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average outstanding shares. Diluted net income (loss) per share is computed using the weighted average outstanding shares and dilutive share equivalents. Dilutive share equivalents consist of share-based compensation awards, including stock options, employee share purchase plan, and restricted stock. The dilutive effect of in-the-money share-based compensation awards is calculated based on the average share price for each fiscal period using the treasury stock method, which assumes that the amount used to repurchase shares includes the amount the employee must pay for exercising share-based awards, the amount of compensation cost not yet recognized for future service, and the amount of tax impact that would be recorded in additional paid-in capital when the award becomes deductible.
Share-Based Compensation Expense	*Share-Based Compensation Expense* Share-based compensation expense includes compensation expense, reduced for estimated forfeitures, for share-based compensation awards granted based on the grant-date fair value. The grant date fair value for stock options and stock purchase rights is estimated using the Black-Scholes-Merton option-pricing valuation model. The grant date fair value of RSUs ("restricted stock units") which vest upon meeting certain market conditions is estimated using the Monte-Carlo simulation method. The grant date fair value of time-based RSUs is calculated based on the market price on the date of grant. Excess tax benefits resulting from the exercise of stock options are classified as cash flows from financing activities in the consolidated statements of cash flows. Excess tax benefits are realized tax benefits from tax deductions for exercised options in excess of the deferred tax asset attributable to share-based compensation costs for such options. The Company will recognize a benefit from share-based compensation in paid-in capital only if an incremental tax benefit is realized after all other available tax attributes have been utilized. For income tax footnote disclosure, the Company has elected to offset deferred tax assets from share-based compensation against the valuation allowance related to the net operating loss and tax credit carryforwards from accumulated tax benefits. The Company will recognize these tax benefits in paid-in capital when the deduction reduces cash taxes payable. In addition, the Company has elected to account for the direct benefits of share-based compensation on the research tax credit through continuing operations.
Product Warranty Accrual	*Product Warranty Accrual* The Company estimates cost of product warranties at the time the related revenue is recognized based on historical and projected warranty claim rates, historical and projected costs, and knowledge of specific product failures that are outside of the Company's typical experience. Each quarter, the Company reevaluates estimates to assess the adequacy of recorded warranty liabilities considering the size of the installed base of products subject to warranty protection and adjusts the amounts as necessary. If actual product failure rates or repair costs differ from estimates, revisions to the estimated warranty liabilities would be required and could materially affect the Company's results of operations.
Comprehensive Income (Loss)	*Comprehensive Income (Loss)* Comprehensive income (loss) is defined as the total change in shareholders' equity during the period other than from transactions with shareholders. Comprehensive income (loss) consists of net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) is comprised of foreign currency translation adjustments from those entities not using the U.S. Dollar as their functional currency, unrealized gains and losses on marketable equity securities, net deferred gains and losses and prior service costs for defined benefit pension plans, and net deferred gains and losses on hedging activity.
Treasury Shares	*Treasury Shares* The Company periodically repurchases shares in the market at fair value. Treasury shares repurchased are recorded at cost as a reduction of total shareholders' equity. Treasury shares held may be reissued to satisfy the exercise of employee stock options and purchase rights, the vesting of restricted stock units, and acquisitions, or may be cancelled with shareholder approval. Treasury shares that are reissued are accounted for using the first-in, first-out basis.
Derivative Financial Instruments	*Derivative Financial Instruments* The Company enters into foreign exchange forward contracts to reduce the short-term effects of foreign currency fluctuations on certain foreign currency receivables or payables and to hedge against exposure to changes in foreign currency exchange rates related to its subsidiaries' forecasted inventory purchases. These forward contracts generally mature within one to three months. The Company may also enter into foreign exchange swap contracts to extend the terms of its foreign exchange forward contracts. Gains and losses for changes in the fair value of the effective portion of the Company's forward contracts related to forecasted inventory purchases are deferred as a component of accumulated other comprehensive income (loss) until the hedged inventory purchases are sold, at which time the gains or losses are reclassified to cost of goods sold. Gains or losses for changes in the fair value on forward contracts that offset translation losses or gains on foreign currency receivables or payables are recognized are included in other income (expense), net.
Restructuring Charges	*Restructuring Charges* The Company's restructuring charges consist of employee severance, one-time termination benefits and ongoing benefits related to the reduction of its workforce, lease exit costs, and other costs. Liabilities for costs associated with a restructuring activity are measured at fair value and are recognized when the liability is incurred, as opposed to when management commits to a restructuring plan. One-time termination benefits are expensed at the date the entity notifies the employee, unless the employee must provide future service, in which case the benefits are expensed ratably over the future service period. Ongoing benefits are expensed when restructuring activities are probable and the benefit amounts are estimable. Costs to terminate a lease before the end of its term are recognized when the property is vacated. Other costs primarily consist of legal, consulting, and other costs related to employee terminations and are expensed when incurred. Termination benefits are calculated based on regional benefit practices and local statutory requirements.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements* In July 2013, the FASB issued Accounting Standards Update ("ASU") No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists . This ASU provides explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. ASU No. 2013-11 is effective for interim and annual periods beginning after December 15, 2013 and was effective for the Company in the first quarter of fiscal 2015. In May 2014, the FASB issued Accounting Standards Update No. 2014-09, "Revenue from Contracts with Customers (Topic 606)," ("ASU 2014-09"). ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. The new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. The new standard will be effective for the Company beginning April 1, 2017. Early application is prohibited. The Company is currently evaluating the impact that adopting this new accounting guidance will have on its consolidated financial statements.