Condensed Consolidated Financial Statements (Policy)	3 Months Ended
Jun. 30, 2018
Condensed Consolidated Financial Statements [Abstract]
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 the 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. Early adoption is permitted, but we have not early adopted this guidance. We expect that the new lease standard will have a material impact on our Consolidated Financial Statements. While we are continuing to assess the effects of adoption, we currently believe the most significant changes relate to the recognition of new ROU assets and lease liabilities on the Consolidated Balance Sheet for real property operating leases as approximately 50% of our store leases and all of our land 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. Absent potential acquisitions, we do not anticipate any significant changes in the volume of our leasing activity until the period of adoption. 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 (“GAAP”) 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 the 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 the 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 have not early adopted this guidance. This guidance is not expected to 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. 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 our Consolidated Financial Statements.
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 $3.1 million. This amount represents the maximum potential amount of future payments under the guarantees as of June 30, 2018. 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. We have recorded a liability related to anticipated defaults under the foregoing leases of $.1 million and $.2 million as of June 30, 2018 and March 31, 2018, respectively.

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 the 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. Early adoption is permitted, but we have not early adopted this guidance. We expect that the new lease standard will have a material impact on our Consolidated Financial Statements. While we are continuing to assess the effects of adoption, we currently believe the most significant changes relate to the recognition of new ROU assets and lease liabilities on the Consolidated Balance Sheet for real property operating leases as approximately 50% of our store leases and all of our land 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. Absent potential acquisitions, we do not anticipate any significant changes in the volume of our leasing activity until the period of adoption.

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 (“GAAP”) 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 the 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 the 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 have not early adopted this guidance. This guidance is not expected to 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.

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 our Consolidated Financial Statements.