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Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Property, Plant and Equipment [Abstract]
Interest expense capitalized	$ 49	$ 49	$ 63
Depreciation expense, including the amortization of capitalized interest	$ 2,700	$ 2,700	$ 2,600

X

- Definition

Depreciation expense including the amortization of capitalized interest.

+ References

No definition available.

+ Details

Name:	jnj_DepreciationExpenseIncludingAmortizationOfCapitalizedInterest
Namespace Prefix:	jnj_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration