WORKERS' COMPENSATION INSURANCE AND RESERVES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 29, 2020	Mar. 31, 2019	Dec. 29, 2019
Workers' Compensation Deductible Limit [Line Items]
Workers' compensation claim deductible limit	$ 2.0
Weighted average period for claim payments below deductible limit	5 years
Payments made against self-insured claims	$ 14.6	$ 15.3
Weighted average period for claim payments and receivables above deductible limit	17 years
Workers' compensation reserve for excess claims	$ 45.6		$ 45.3
Worker's compensation receivable for excess claims	44.6		$ 45.3
Workers compensation expense	$ 14.3	$ 11.9
Below limit
Workers' Compensation Deductible Limit [Line Items]
Workers' compensation discount	2.00%		2.00%
Above Limit
Workers' Compensation Deductible Limit [Line Items]
Workers' compensation discount	2.20%		2.40%

Discounted workers compensation reserve for excess claims.

No definition available.

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- Definition

Estimated weighted average period in which claim payments are made and reimbursements from insurance carries are received for workers' compensation claims that are above the established deductible limit as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Estimated weighted average period in which claim payments are made for workers' compensation claims that are below the established deductible limit as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Amount of risk retained by the entity for workers' compensation claims, on a per occurrence basis, before the insurance arrangement begins to provide coverage.

+ References

No definition available.

+ Details

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- Definition

Worker's Compensation Claim Receivables

+ References

No definition available.

+ Details

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- Definition

[Line Items] for Workers' Compensation Deductible Limit

+ References

No definition available.

+ Details

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- Definition

Workers' compensation expense recognized during the period for claims reserves net of changes in discount in non monopolistic jurisdictions; premiums in monopolistic jurisdictions; insurance premiums; changes in the valuation allowance related to receivables from insurance companies; and other miscellaneous expenses.

+ References

No definition available.

+ Details

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- Definition

Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 25
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

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- Definition

Percent discount applied to worker's compensation reserve liability to reduce the reserve to present value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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-Subparagraph (SX 210.7-03.13(b))
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