COMMITMENTS AND GUARANTEES - Additional Information (Detail) $ in Millions	9 Months Ended
Oct. 02, 2021 USD ($) distribution_center office_building
Guarantor Obligations [Line Items]
Number of distribution centers \| distribution_center	1
Number of office buildings \| office_building	2
Guarantee amount (up to)	$ 324.6
Carrying amount of guarantees recorded in the consolidated balance sheet	8.4
Guarantees on the residual values of leased assets
Guarantor Obligations [Line Items]
Guarantee amount (up to)	89.6
Leased asset, fair value	116.2
Carrying amount of guarantees recorded in the consolidated balance sheet	0.0
Standby letters of credit
Guarantor Obligations [Line Items]
Guarantee amount (up to)	167.6
Carrying amount of guarantees recorded in the consolidated balance sheet	0.0
Commercial customer financing arrangements
Guarantor Obligations [Line Items]
Guarantee amount (up to)	67.4
Carrying amount of guarantees recorded in the consolidated balance sheet	$ 8.4

Number Of Distribution Centers

No definition available.

Name:	swk_NumberOfDistributionCenters
Namespace Prefix:	swk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Office Buildings

+ References

No definition available.

+ Details

Name:	swk_NumberofOfficeBuildings
Namespace Prefix:	swk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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=121555522&loc=d3e12069-110248

+ Details

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

- 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

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

- 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=121555522&loc=d3e12069-110248

+ Details

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

- Definition

Amount of residual asset covered by residual value guarantee. Excludes guarantee considered to be lease payments for lessor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 7
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919381-209981

+ Details

Name:	us-gaap_ResidualValueOfLeasedAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_PropertyLeaseGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=swk_CommercialCustomerFinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: