Significant Accounting Policies (Policy)	12 Months Ended
Significant Accounting Policies (Policy)	Mar. 30, 2019
Significant Accounting Policies [Abstract]
Background	Background Monro, Inc. and its wholly owned operating subsidiaries, Monro Service Corporation and Car-X, LLC (together, “Monro”, the “Company”, “we”, “us”, or “our”), are engaged principally in providing automotive undercar repair and tire sales and services in the United States. Monro had 1,197 Company-operated stores, 98 franchised locations, eight wholesale locations, three retread facilities and two dealer-operated automotive repair centers located in 28 states as of March 30, 2019. Monro’s operations are organized and managed in one operating segment. The internal management financial reporting that is the basis for evaluation in order to assess performance and allocate resources by our chief operating decision maker consists of consolidated data that includes the results of our retail, commercial and wholesale locations. As such, our one operating segment reflects how our operations are managed, how resources are allocated, how operating performance is evaluated by senior management and the structure of our internal financial reporting.
Accounting estimates	Accounting estimates The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles. The preparation of financial statements in conformity with such principles requires the use of estimates by management during the reporting period. Actual results could differ from those estimates.
Fiscal year	Fiscal year Monro reports its results on a 52/53 week fiscal year ending on the last Saturday of March of each year. The following are the dates represented by each fiscal period: “Year ended Fiscal March 2019”: April 1, 2018 – March 30, 2019 (52 weeks) “Year ended Fiscal March 2018”: March 26, 2017 – March 31, 2018 (53 weeks) “Year ended Fiscal March 2017”: March 27, 2016 – March 25, 2017 (52 weeks)
Consolidation	Consolidation The Consolidated Financial Statements include Monro, Inc. and its wholly owned operating subsidiaries, Monro Service Corporation and Car-X, LLC, after the elimination of intercompany transactions and balances.
Reclassifications	Reclassifications Certain amounts in these financial statements have been reclassified to maintain comparability among the periods presented.
Cash equivalents	Cash equivalents We consider all highly liquid instruments with original maturities of three months or less to be cash equivalents.
Inventories	Inventories Our inventories consist of automotive parts (including oil) and tires. Inventories are valued at the lower of cost and net realizable value using the first-in, first-out (FIFO) method.
Barter credits	Barter credits We value barter credits at the fair market value of the inventory surrendered, as determined by reference to price lists for buying groups and jobber pricing. We use these credits primarily to pay vendors for purchases (mainly inventory vendors for the purchase of parts, oil and tires) or to purchase other goods or services from the barter company such as advertising.
Property, plant and equipment	Property, plant and equipment Property, plant and equipment are stated at cost. Depreciation of property, plant and equipment is provided on a straight-line basis. Buildings and improvements related to owned locations are depreciated over lives varying from 10 to 39 years; machinery, fixtures and equipment over lives varying from 3 to 15 years; and vehicles over lives varying from 5 to 10 years. Computer hardware and software is depreciated over lives varying from 3 to 7 years. Buildings and improvements related to leased locations are depreciated over the shorter of the asset’s useful life or the reasonably assured lease term, as defined in the accounting guidance on leases. When property is sold or retired, the cost and accumulated depreciation are eliminated from the accounts and a gain or loss is recorded in the Consolidated Statements of Comprehensive Income. Expenditures for maintenance and repairs are expensed as incurred.
Long-lived assets	Long-lived assets We evaluate the ability to recover long-lived assets whenever events or circumstances indicate that the carrying value of the asset may not be recoverable. In the event assets are impaired, losses are recognized to the extent the carrying value exceeds the fair value. In addition, we report assets to be disposed at the lower of the carrying amount and the fair market value less costs to sell.
Store opening and closing costs	Store opening and closing costs New store opening costs are charged to expense in the fiscal year when incurred. When we close a store, the estimated unrecoverable costs, including the remaining lease obligation net of sublease income, if any, are charged to expense.
Leases	Leases Financing Obligations – We are involved in the construction of leased stores. In some cases, we are responsible for construction cost overruns or non-standard tenant improvements. As a result of this involvement, we are deemed the “owner” for accounting purposes during the construction period, requiring us to capitalize the construction costs on our Consolidated Balance Sheet. Upon completion of the project, we perform a sale-leaseback analysis pursuant to guidance on accounting for leases to determine if we can remove the assets from our Consolidated Balance Sheet. For some of these leases, we are considered to have “continuing involvement”, which precludes us from derecognizing the assets from our Consolidated Balance Sheet when construction is complete. In conjunction with these leases, we capitalize the construction costs on our Consolidated Balance Sheet and also record financing obligations representing payments owed to the landlord. We do not report rent expense for the properties which are owned for accounting purposes. Rather, rental payments under the lease are recognized as a reduction of the financing obligation and as interest expense. Since we often assume leases in acquisition transactions, the prior accounting by the seller who was involved in the construction of leased stores passes to us. Additionally, we may incur other financing obligations in connection with the accounting for acquisitions. Capital Leases – Some of our property is held under capital leases. These assets are included in property, plant and equipment and depreciated over the term of the lease. We do not report rent expense for capital leases. Rather, rental payments under the lease are recognized as a reduction of the capital lease obligation and interest expense. Operating Leases – All other leases are considered operating leases. Rent expense, including rent escalations, is recognized on a straight-line basis over the reasonably assured lease term, as defined in the accounting guidance on leases. Generally, the lease term is the base lease term plus certain renewal option periods for which renewal is reasonably assured.
Goodwill and intangible assets	Goodwill and intangible assets We have a history of growth through acquisitions. Assets and liabilities of acquired businesses are recorded at their estimated fair values as of the date of acquisition. Goodwill represents costs in excess of fair values assigned to the underlying net assets of acquired businesses. The carrying value of goodwill is subject to an annual impairment test, which we perform in the third quarter of the fiscal year. Impairment tests may also be triggered by any significant events or changes in circumstances affecting our business. We have one reporting unit which encompasses all operations including new acquisitions. In performing our annual goodwill impairment test, we perform a qualitative assessment to determine if it is more likely than not that the fair value is less than the carrying value of goodwill. The qualitative assessment includes a review of business changes, economic outlook, financial trends and forecasts, growth rates, industry data, market capitalization and other relevant qualitative factors. If the qualitative factors indicate a potential impairment, we compare the fair value of our reporting unit to the carrying value of our reporting unit. If the fair value is less than its carrying value, an impairment charge is recognized in an amount equal to that excess. The loss recognized cannot exceed the carrying amount of goodwill. Intangible assets primarily represent allocations of purchase price to identifiable intangible assets of acquired businesses and are amortized over their estimated useful lives. All intangibles and other long-lived assets are reviewed when events or changes in circumstances indicate that the asset’s carrying value may not be recoverable. If such indicators are present, it is determined whether the sum of the estimated undiscounted future cash flows attributable to such assets is less than their carrying values. No such indicators were present in fiscal 2019, 2018 or 2017. A deterioration of macroeconomic conditions may not only negatively impact the estimated operating cash flows used in our cash flow models, but may also negatively impact other assumptions used in our analyses, including, but not limited to, the estimated cost of capital and/or discount rates. Additionally, we are required to ensure that assumptions used to determine fair value in our analyses are consistent with the assumptions a hypothetical marketplace participant would use. As a result, the cost of capital and/or discount rates used in our analyses may increase or decrease based on market conditions and trends, regardless of whether our actual cost of capital has changed. Therefore, we may recognize an impairment of an intangible asset or assets even though realized actual cash flows are approximately equal to or greater than our previously forecasted amounts. As a result of our annual qualitative assessment performed in the third quarter of fiscal 2019, there were no impairments. There have been no triggering events during the fourth quarter of fiscal 2019.
Self-insurance reserves	Self-insurance reserves We are largely self-insured with respect to workers’ compensation, general liability and employee medical claims. In order to reduce our risk and better manage our overall loss exposure, we purchase stop-loss insurance that covers individual claims in excess of the deductible amounts, and caps total losses in a fiscal year. We maintain an accrual for the estimated cost to settle open claims as well as an estimate of the cost of claims that have been incurred but not reported. These estimates take into consideration the historical average claim volume, the average cost for settled claims, current trends in claim costs, changes in our business and workforce, and general economic factors. These accruals are reviewed on a quarterly basis, or more frequently if factors dictate a more frequent review is warranted. For more complex reserve calculations, such as workers’ compensation, we use the services of an actuary on an annual basis to assist in determining the required reserve for open claims.
Warranty	Warranty We provide an accrual for estimated future warranty costs for parts that we install based upon the historical relationship of warranty costs to sales. Warranty expense related to all product warranties at and for the fiscal years ended March 2019, 2018 and 2017 was not material to our financial position or results of operations. See additional discussion of tire road hazard warranty agreements under Note 7.
Comprehensive income	Comprehensive income As it relates to Monro, comprehensive income is defined as net earnings as adjusted for pension liability adjustments and is reported net of related taxes in the Consolidated Statements of Comprehensive Income and in the Consolidated Statements of Changes in Shareholders’ Equity.
Income taxes	Income taxes Deferred tax assets and liabilities are determined based upon the expected future tax outcome of differences between the tax laws and accounting rules of various items of income and expense recognized in our results of operations using enacted tax rates in effect for the year in which the future tax outcome is expected. The accounting guidance for uncertainties in income tax prescribes a comprehensive model for the financial statement recognition, measurement, presentation, and disclosure of uncertain tax positions taken or expected to be taken in income tax returns. Monro recognizes a tax benefit from an uncertain tax position in the financial statements only when it is more likely than not that the position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits and a consideration of the relevant taxing authority's administrative practices and precedents.
Treasury stock	Treasury stock Treasury stock is accounted for using the par value method.
Stock-based compensation	Stock-based compensation We provide stock-based compensation through non-qualified stock options, restricted stock awards and restricted stock units. We measure compensation cost arising from the grant of share-based payments to an employee at fair value, and recognize such cost in income over the period during which the employee is required to provide service in exchange for the award, usually the vesting period. The fair value of each option award is estimated on the date of grant primarily using the Black-Scholes option valuation model. The assumptions used to estimate fair value require significant judgment and are subject to change in the future due to factors such as employee exercise behavior, stock price trends, and changes to type or provisions of stock-based awards. Any material change in one or more of these assumptions could have an impact on the estimated fair value of a future award. The fair value of restricted stock awards and restricted stock units (collectively “restricted stock”) is determined based on the stock price at the date of grant. The Company is required to estimate forfeitures and only record compensation costs for those awards that are expected to vest. The assumptions for forfeitures were determined based on type of award and historical experience. Forfeiture assumptions are adjusted at the point in time a significant change is identified, with any adjustment recorded in the period of change, and the final adjustment at the end of the requisite service period to equal actual forfeitures. We recognize compensation expense related to stock options and restricted stock using the straight-line approach. Option awards and restricted stock generally vest equally over the service period established in the award, typically three or four years. In fiscal 2019, the Company issued a limited number of restricted stock units to members of senior management which may vest upon the achievement of a three-year average return on invested capital target.
Earnings per common share	Earnings per common share Basic earnings per common share amounts are calculated by dividing income available to common shareholders, after deducting preferred stock dividends, by the weighted average number of shares of common stock outstanding. Diluted earnings per common share amounts are calculated by dividing net income by the weighted average number of shares of common stock and common stock equivalents outstanding. Common stock equivalents represent shares issuable upon the assumed exercise of common stock options outstanding.
Advertising	Advertising We expense the production costs of advertising the first time the advertising takes place, except for direct response advertising which is capitalized and amortized over its expected period of future benefits. Direct response advertising consists primarily of coupons for Monro’s services. The capitalized costs of this advertising are amortized over the period of the coupon’s validity, which is typically two months. Prepaid advertising at March 30, 2019 and March 31, 2018, and advertising expense for the fiscal years ended March 2019, 2018 and 2017, were not material to these financial statements.
Vendor rebates	Vendor rebates We account for vendor rebates as a reduction of the cost of products purchased.
Guarantees	Guarantees At the time we issue a guarantee, we recognize an initial liability for the fair value, or market value, of the obligation we assume under that guarantee. Monro has guaranteed certain lease payments, primarily related to franchisees, amounting to $1.8 million. This amount represents the maximum potential amount of future payments under the guarantees as of March 30, 2019. The leases are guaranteed through April 2020. In the event of default by the franchise owner, Monro generally retains the right to assume the lease of the related store, enabling Monro to re-franchise the location or to operate that location as a Company-operated store. As of March 30, 2019, an immaterial liability related to anticipated defaults under the foregoing leases is recorded. We recorded a liability related to anticipated defaults under the foregoing leases of $.2 million as of March 31, 2018.
Recent Accounting Pronouncements	Recent accounting pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued new accounting guidance for the reporting of revenue from contracts with customers. This guidance provides guidelines a company will apply to determine the measurement of revenue and timing of when it is recognized. Additional guidance has subsequently been issued to amend or clarify the reporting of revenue from contracts with customers. The guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2017. Early adoption was permitted. We adopted this guidance and all related amendments during the first quarter of fiscal 2019 using the modified retrospective approach. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. See Note 7 for additional information. In February 2016, the FASB issued new accounting guidance related to leases. This guidance establishes a right of use (“ROU”) model that requires a lessee to record a ROU asset and lease liability on the balance sheet for all leases with terms longer than twelve months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition. The guidance is effective for financial statements issued for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Additional guidance has subsequently been issued in order to provide an additional transition method as well as an additional practical expedient to be available upon adoption. We are required to adopt the new lease guidance utilizing one of two methods: retrospective restatement for each reporting period presented at time of adoption, or a modified retrospective approach with the cumulative effect of initially applying this guidance recognized at the date of initial application. Under the modified retrospective approach, prior periods would not be restated. We expect to adopt using the modified retrospective approach and elect the package of practical expedients not to reassess prior conclusions related to contracts containing leases, lease classification and the lessee practical expedient to combine lease and non-lease components for certain asset classes. Under this transition method, we will apply the new standard at the adoption date and recognize a cumulative-effect adjustment to retained earnings. We currently believe the most significant changes relate to the recognition of new ROU assets and lease liabilities on the Consolidated Balance Sheet for operating leases as approximately 40% of our store leases, all of our land leases and all of our non-real estate leases are currently not recorded on our balance sheet. We expect that substantially all of our operating lease commitments will be subject to the new guidance and will be recognized as operating lease liabilities and ROU assets upon adoption. We estimate the adoption of this update will result in an increase to assets and related liabilities of approximately $165 million to $190 million. We do not anticipate that the new standard will have a material impact on our Consolidated Statements of Income and Comprehensive Income. In June 2016, the FASB issued new accounting guidance which modifies the measurement of expected credit losses of certain financial instruments. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2019. Early adoption is permitted. We are currently evaluating the potential impact of the adoption of this guidance on our Consolidated Financial Statements. In August 2016, the FASB issued new accounting guidance related to cash flow classification. This guidance clarifies and provides specific guidance on eight cash flow classification issues that are not addressed by current generally accepted accounting principles and thereby reduce the current diversity in practice. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2017. Early adoption was permitted. We adopted this guidance during the first quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. In January 2017, the FASB issued new accounting guidance which clarifies the definition of a business, particularly when evaluating whether transactions should be accounted for as acquisitions or dispositions of assets or businesses. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2017. Early adoption was permitted for certain transactions. We adopted this guidance during the first quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. In January 2017, the FASB issued new accounting guidance simplifying the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which required the determination of an implied fair value of goodwill. Under this guidance, an entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. This guidance is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We adopted this guidance during the third quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. In March 2017, the FASB issued accounting guidance that amends how employers present the net benefit cost in the income statement. The new guidance requires employers to disaggregate and present separately the current service cost component from the other components of the net benefit cost within the Consolidated Statement of Comprehensive Income. This guidance is effective for fiscal years and interim periods beginning after December 15, 2017, and should be applied retrospectively. Early adoption was permitted. We adopted this guidance during the first quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. In May 2017, the FASB issued new accounting guidance which clarifies when to account for a change to the terms or conditions of a share based payment award as a modification. Under this guidance, modification is required only if the fair value, the vesting conditions, or the classification of an award as equity or liability changes as a result of the change in terms or conditions. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2017. Early adoption was permitted. We adopted this guidance during the first quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. In June 2018, the FASB issued new accounting guidance that amends the accounting for nonemployee share-based awards. Under the new guidance, the existing guidance related to the accounting for employee share-based awards will apply to nonemployee share-based transactions, with certain exceptions. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2018. Early adoption is permitted. We are currently evaluating the potential impact of the adoption of this guidance on our Consolidated Financial Statements. In August 2018, the FASB issued new accounting guidance which eliminates, adds and modifies certain disclosure requirements for fair value measurements. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2019. Early adoption is permitted. We are currently evaluating the potential impact of the adoption of this guidance on our Consolidated Financial Statements. In August 2018, the FASB issued new accounting guidance that aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2019. Early adoption was permitted. We adopted this guidance during the third quarter of fiscal 2019. The adoption of this guidance did not have a material impact on our Consolidated Financial Statements. Other recent authoritative guidance issued by the FASB (including technical corrections to the Accounting Standards Codification) and the Securities and Exchange Commission did not, or are not expected to have a material effect on Monro’s Consolidated Financial Statements.