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CAPITAL STOCK - Additional Information, Common Stock Share Activity (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 29, 2012
Jun. 29, 2013
Jun. 30, 2012
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Jan. 31, 2013
Aug. 01, 2013
Class of Stock [Line Items]                  
Initial delivery of shares repurchased (in shares) 9,345,794swk_AcceleratedShareRepurchasesInitialDeliveryOfSharesRepurchased 1,608,695swk_AcceleratedShareRepurchasesInitialDeliveryOfSharesRepurchased              
Repurchase of common stock, shares     (3,000,000)us-gaap_StockRepurchasedDuringPeriodShares (340,576)us-gaap_StockRepurchasedDuringPeriodShares (8,300,853)us-gaap_StockRepurchasedDuringPeriodShares (13,253,790)us-gaap_StockRepurchasedDuringPeriodShares      
Forward share purchase contract       $ 150.0us-gaap_PaymentsForRepurchaseOfEquity     $ 350.0us-gaap_PaymentsForRepurchaseOfEquity    
Forward share purchase contract, shares purchased (5,581,400)us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased     (1,603,822)us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased 0us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased (5,581,400)us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased 5,581,400us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased   5,581,400us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Subsequent Event                  
Class of Stock [Line Items]                  
Forward share purchase contract               $ 362.7us-gaap_PaymentsForRepurchaseOfEquity
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