Parent and Subsidiary Debt Guarantees - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012	Mar. 31, 2012	Dec. 31, 2011
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Cash and cash equivalents	$ 557.5	$ 716.0	$ 883.6	$ 906.9
Notes payable due 2021
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	3.40%	3.40%
Notes payable due 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	5.75%	5.75%
Parent Stanley Black & Decker, Inc.
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Cash and cash equivalents	1.0	83.5	(1.1)	56.2
Parent Stanley Black & Decker, Inc. | Notes payable due 2012
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	4.90%			4.90%
Parent Stanley Black & Decker, Inc. | Notes payable due 2021
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	3.40%			3.40%
The Black & Decker Corporation
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Cash and cash equivalents	0.3	1.5	19.7	1.4
The Black & Decker Corporation | Notes payable due 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	5.75%			5.75%
Subsidiaries Non Guarantor [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Cash and cash equivalents	$ 556.2	$ 631.0	$ 865.0	$ 849.3