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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplier Financing Program (Details) $ in Millions	12 Months Ended
	Dec. 28, 2024 USD ($)
Supplier Finance Program, Obligation [Roll Forward]
Confirmed obligations outstanding at the beginning of the period	$ 142
Invoices confirmed during the period	542
Confirmed invoices paid during the period	(550)
Foreign currency impact	(2)
Confirmed obligations outstanding at the end of the period	$ 132

X

- Definition

Supplier Finance Program, Foreign Currency Gain (Loss)

+ References

No definition available.

+ Details

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Namespace Prefix:	klg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of obligation for supplier finance program.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477128/405-50-55-5

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-URI https://asc.fasb.org/1943274/2147479468/405-50-50-3

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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479468/405-50-50-3

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of decrease in obligation for supplier finance program from settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477128/405-50-55-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase in obligation for supplier finance program.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477128/405-50-55-5

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Period Type:	duration

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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