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SHORT AND LONG-TERM DEBT - SHORT-TERM DEBT NARRATIVE (Details) - Line of Credit - Revolving Credit Facility - Line of Credit $ in Millions	6 Months Ended
	Jul. 02, 2023 USD ($) option	Apr. 26, 2023 USD ($)
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity terminated		$ 1,500
Line of credit facility, maximum borrowing capacity	$ 1,350
Line of credit facility, accordion feature increase limit	$ 500
Termination date, number of extension option | option	2
Termination date, extension term	1 year

X

- Definition

Debt, Termination Date, Extension Term

+ References

No definition available.

+ Details

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Namespace Prefix:	hsy_
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Balance Type:	na
Period Type:	duration

X

- Definition

Debt, Termination Date, Number of Extension Option

+ References

No definition available.

+ Details

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Namespace Prefix:	hsy_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Line Of Credit Facility, Accordion Feature Increase Limit

+ References

No definition available.

+ Details

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Namespace Prefix:	hsy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line of Credit Facility, Maximum Borrowing Capacity Terminated

+ References

No definition available.

+ Details

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Namespace Prefix:	hsy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

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Balance Type:	na
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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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X

- Details

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X

- Details

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- Details

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