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COMMITMENTS AND GUARANTEES - Financial Guarantees (Detail) $ in Millions	12 Months Ended
	Jan. 01, 2022 USD ($)
Guarantor Obligations [Line Items]
Maximum Potential Payment	$ 324.5
Carrying Amount of Liability	8.5
Guarantees on the residual values of leased properties
Guarantor Obligations [Line Items]
Maximum Potential Payment	89.6
Carrying Amount of Liability	$ 0.0
Standby letters of credit
Guarantor Obligations [Line Items]
Term	3 years
Maximum Potential Payment	$ 165.7
Carrying Amount of Liability	$ 0.0
Commercial customer financing arrangements
Guarantor Obligations [Line Items]
Term	6 years
Maximum Potential Payment	$ 69.2
Carrying Amount of Liability	$ 8.5
Minimum | Guarantees on the residual values of leased properties
Guarantor Obligations [Line Items]
Term	1 year
Maximum | Guarantees on the residual values of leased properties
Guarantor Obligations [Line Items]
Term	5 years

X

- Definition

Guarantor Obligation, Term

+ References

No definition available.

+ Details

Name:	swk_GuarantorObligationTerm
Namespace Prefix:	swk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

No definition available.

+ Details

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

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

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Period Type:

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- Details

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- Details

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