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GOODWILL AND INTANGIBLE ASSETS - Aggregate Intangible Assets Amortization Expense by Segment (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets, discontinued operations $ 2.9swk_DepreciationAndAmortizationDiscontinuedOperationsIntangibleAssets $ 4.2swk_DepreciationAndAmortizationDiscontinuedOperationsIntangibleAssets $ 22.2swk_DepreciationAndAmortizationDiscontinuedOperationsIntangibleAssets
Amortization of intangible Assets 186.4us-gaap_AmortizationOfIntangibleAssets 203.3us-gaap_AmortizationOfIntangibleAssets 207.4us-gaap_AmortizationOfIntangibleAssets
Construction and Do It Yourself      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible Assets 33.3us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_ConstructionAndDoItYourselfMember
37.7us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_ConstructionAndDoItYourselfMember
35.9us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_ConstructionAndDoItYourselfMember
Industrial Segment      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible Assets 73.8us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_IndustrialSegmentMember
74.0us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_IndustrialSegmentMember
58.3us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_IndustrialSegmentMember
Securities Industry [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible Assets $ 79.3us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_SecuritiesIndustryMember
$ 91.6us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_SecuritiesIndustryMember
$ 113.2us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= swk_SecuritiesIndustryMember