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FAIR VALUE - Schedule of Fair Value of Debt (Details) - Senior Notes - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
2026 Senior Notes
Debt Instrument [Line Items]
Stated interest rate	5.50%		5.50%
2026 Senior Notes | Book Value
Debt Instrument [Line Items]
Debt instrument value	$ 500,000	$ 500,000
2026 Senior Notes | Estimated Fair Value
Debt Instrument [Line Items]
Debt instrument value	$ 519,450	$ 537,500
2028 Senior Notes
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
2028 Senior Notes | Book Value
Debt Instrument [Line Items]
Debt instrument value	$ 500,000	$ 500,000
2028 Senior Notes | Estimated Fair Value
Debt Instrument [Line Items]
Debt instrument value	$ 515,000	$ 510,000

X

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

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.

+ References

No definition available.

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