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MERGER AND ACQUISITIONS - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
May 28, 2013
Feb. 27, 2013
Dec. 28, 2013
Jan. 31, 2013
Business Acquisition [Line Items]              
Business Acquisition, Pro Forma Revenue   $ 11,001.5us-gaap_BusinessAcquisitionsProFormaRevenue          
Purchase price for acquisitions 3.2us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired 933.9us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired 707.3us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired        
Goodwill acquired, FAS 141R (7,275.5)us-gaap_Goodwill (7,562.7)us-gaap_Goodwill       (7,562.7)us-gaap_Goodwill  
Business Acquisition, Pro Forma Net Income (Loss)   550.9us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss          
Business Acquisition, Pro Forma Earnings Per Share, Diluted   $ 3.47us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted          
GQ [Member]              
Business Acquisition [Line Items]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents       3.5us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Purchase price for acquisitions       48.5us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Goodwill acquired, FAS 141R       (92.6)us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Percentage of ownership interest       60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       20.4us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net       10.8us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= swk_GQMember
     
Infastech              
Business Acquisition [Line Items]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents         82.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Purchase price for acquisitions         826.4us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Goodwill acquired, FAS 141R         (529.7)us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Percentage of ownership interest         100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables         117.3us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory         86.7us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets         5.3us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment         46.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets         3.4us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable         (99.0)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other         (52.6)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Acquisition Purchase Price Allocation Deferred Income Tax Liabilities Noncurrent         (68.6)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other         (42.8)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net         378.7us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net         908.4swk_TotalConsiderationPaidforAcquisition
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
   
Infastech | Trade names              
Business Acquisition [Line Items]              
Weighted-average useful lives           15 years  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill         22.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
   
Infastech | Customer relationships              
Business Acquisition [Line Items]              
Weighted-average useful lives           12 years 8 months 12 days  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill         251.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
   
Infastech | Technology [Member]              
Business Acquisition [Line Items]              
Weighted-average useful lives           10 years  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill         28.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_InfastechMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= swk_TechnologyMember
   
Powers & Aeroscout              
Business Acquisition [Line Items]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents     7.7us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
Number of businesses acquired during the period     2us-gaap_NumberOfBusinessesAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
Net assets acquired, excluding goodwill, FAS 141R     279.4us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
Liabilities assumed, FAS 141R     95.3us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
Goodwill acquired, FAS 141R     (282.9)us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     169.9us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersAeroscoutMember
       
AeroScout              
Business Acquisition [Line Items]              
Purchase price for acquisitions     238.8us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_AeroscoutMember
       
Powers              
Business Acquisition [Line Items]              
Purchase price for acquisitions     220.5us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_PowersMember
       
Series of Individually Immaterial Business Acquisitions              
Business Acquisition [Line Items]              
Number of businesses acquired during the period   4us-gaap_NumberOfBusinessesAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
7us-gaap_NumberOfBusinessesAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
       
Purchase price for acquisitions   40.9us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
696.0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
       
Series of Individually Immaterial Business Acquisitions | Other 2012 Acquisitions [Member] [Member]              
Business Acquisition [Line Items]              
Number of businesses acquired during the period     5us-gaap_NumberOfBusinessesAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= swk_Other2012AcquisitionsMemberMember
       
Series of Individually Immaterial Business Acquisitions | Other acquisitions              
Business Acquisition [Line Items]              
Purchase price for acquisitions     236.7us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= swk_OtherAcquisitionsMember
       
Lista North America              
Business Acquisition [Line Items]              
Purchase price for acquisitions     89.7us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_ListaNorthAmericaMember
       
Tong Lung              
Business Acquisition [Line Items]              
Purchase price for acquisitions     102.8us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_TongLungMemberMember
      12.0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_TongLungMemberMember
Percentage of ownership interest     89.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= swk_TongLungMemberMember
       
Short-term debt assumed, FAS 141R     $ 20.1swk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDebtAssumedShortTerm
/ us-gaap_BusinessAcquisitionAxis
= swk_TongLungMemberMember