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RETIREMENT PLANS (Narrative) (Details) - USD ($)	12 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Mar. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation, plan funded by company	$ 11,100,000	$ 9,200,000
Reinsurance contracts asset value	7,000,000.0	6,300,000
Accumulated benefit obligation	30,600,000	27,900,000
Amount expected to be amortized from accumulated other comprehensive loss in next fiscal year	400,000
Subsidiaries
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions	700,000	600,000	$ 600,000
Savings Plus Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions	4,900,000	4,700,000	5,000,000.0
401k Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions	$ 0	$ 0	$ 0

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Defined Benefit Plan, Benefit Obligation, Plan Funded by Company

+ References

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- Definition

Defined Benefit Plan, Reinsurance Contracts Asset Value

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- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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