Condensed Consolidating Statements of Cash Flow (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011	Jun. 30, 2012 Parent Stanley Black & Decker, Inc.	Jul. 02, 2011 Parent Stanley Black & Decker, Inc.	Jun. 30, 2012 The Black & Decker Corporation	Jul. 02, 2011 The Black & Decker Corporation	Jun. 30, 2012 Non-Guarantor Subsidiaries	Jul. 02, 2011 Non-Guarantor Subsidiaries	Jun. 30, 2012 Eliminations	Jul. 02, 2011 Eliminations
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Cash (used in) provided by operating activities	$ 299.2	$ 179.4	$ 266.9	$ 299.7		$ (228.6)	$ (290.1)	$ (76.2)	$ 377.2	$ 571.7	$ 212.6	$ 0	$ 0
INVESTING ACTIVITIES
Capital expenditures	(109.0)	(67.9)	(170.5)	(138.0)		(46.0)	(51.9)	0	0	(124.5)	(86.1)	0	0
Business acquisitions, net of cash acquired	(462.7)	(37.8)	(577.4)	(106.1)	(216.2)	(458.3)	0	(2.5)	0	(116.6)	(106.1)	0	0
Proceeds from sale of assets	4.4	2.2	6.3	26.0		0.9	0	0	0	5.4	26.0	0	0
Intercompany payables and receivables			0	0		533.8	(170.3)	481.8	491.1	0	0	(1,015.6)	(320.8)
Proceeds (payments) on net investment hedge settlements	5.0	(6.5)	7.0	(29.2)		5.0	(18.4)	2.0	(10.8)	0	0	0	0
Short-term investments	0	(42.5)	0	(42.5)			0		0		(42.5)		0
Cash provided by (used in) investing activities	(573.6)	(211.0)	(745.9)	(348.3)		35.4	(240.6)	481.3	480.3	(247.0)	(267.2)	(1,015.6)	(320.8)
FINANCING ACTIVITIES
Payments on long-term debt	(320.8)	(400.9)	(321.1)	(401.4)		(320.6)		0		(0.5)		0
Proceeds (payments) on long-term debt				(380.9)			20.5		(400.0)		(1.4)		0
Net premium paid for equity option	0	(19.6)	0	(19.6)			(19.6)		0
Stock purchase contract fees	(0.8)	(0.8)	(1.6)	(1.6)		(1.6)	(1.6)	0	0	0	0	0	0
Net short-term borrowings (repayments)	592.1	483.4	788.9	624.8		789.1	626.2	0	0	(0.2)	(1.4)	0	0
Cash dividends on common stock	(68.9)	(68.9)	(138.8)	(137.5)		(138.8)	(137.5)	0	0	0	0	0	0
Termination of interest rate swaps	0	0	35.8	0		15.2		20.6		0		0
Termination of forward starting interest rate swap	0	0	(56.4)	0		(56.4)		0		0		0
Proceeds from the issuance of common stock	10.9	30.0	75.5	85.4		75.5	85.4	0	0	0	0	0	0
Purchase of common stock for treasury	(206.9)	(5.4)	(217.8)	(6.1)		(217.8)	(6.1)	0	0	0	0	0	0
Intercompany payables and receivables			0	0		0	0	(424.8)	(458.3)	(590.8)	137.5	1,015.6	320.8
Cash provided by (used in) financing activities	5.6	38.3	164.5	164.5		144.6	567.3	(404.2)	(858.3)	(591.5)	134.7	1,015.6	320.8
Effect of exchange rate changes on cash and cash equivalents	(37.0)	26.9	(14.6)	55.7		0	0	0	0	(14.6)	55.7	0	0
Change in cash and cash equivalents	(305.8)	33.6	(329.1)	171.6		(48.6)	36.6	0.9	(0.8)	(281.4)	135.8	0	0
Cash and cash equivalents, beginning of period	883.6	1,880.8	906.9	1,742.8	1,742.8	56.2	(5.0)	1.4	3.5	849.3	1,744.3	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 577.8	$ 1,914.4	$ 577.8	$ 1,914.4	$ 906.9	$ 7.6	$ 31.6	$ 2.3	$ 2.7	$ 567.9	$ 1,880.1	$ 0	$ 0