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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. 25, 2023	Mar. 26, 2022	Mar. 27, 2021
Cash Settled Deferred Share Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units [Line Items]
Beginning balance	0	689,012	465,134
Grants of new units	35,584	61,470	223,878
Converted to equity-settled awards		(750,482)
Ending balance	35,584	0	689,012
Cash Settled Restricted Stock Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units [Line Items]
Beginning balance	50,000	375,000	0
Grants of new units	0		375,000
Converted to equity-settled awards		(325,000)
Ending balance	50,000	50,000	375,000
Equity Settled Deferred Share Units [Member]
Schedule Restricted Stock Options And Deferred Stock Units [Line Items]
Beginning balance	750,482	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]
Beginning balance	325,000	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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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
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