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Benefit Plans and Stock-Based Compensation - Summary of Birks' Restricted Stock Units And Deferred Share Units (Detail) - shares	12 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Mar. 28, 2020
Cash Settled Deferred Share Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items]
Beginning balance	689,012	465,134	257,005
Grants of new units	61,470	223,878	244,844
Settled in cash			(36,715)
Converted to equity-settled awards	(750,482)
Ending balance	0	689,012	465,134
Cash Settled Restricted Stock Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items]
Beginning balance	375,000	0	102,000
Grants of new units		375,000
Settled in cash			(102,000)
Converted to equity-settled awards	(325,000)
Ending balance	50,000	375,000	0
Equity Settled Deferred Share Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items]
Beginning balance	0
Converted to equity-settled awards	750,482
Ending balance	750,482	0
Equity Settled Restricted Stock Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items]
Beginning balance	0
Converted to equity-settled awards	325,000
Ending balance	325,000	0

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Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options, Converision to Equity Settled Awrds.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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