Parent and Subsidiary Debt Guarantees - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Notes payable due 2012
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	4.90%	4.90%
Notes payable due 2013
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	6.15%	6.15%
Notes payable due 2021
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	3.40%	3.40%
Notes payable due 2014
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	4.75%	4.75%
Notes 8 Point 95 Percent Due 2014
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	8.95%	8.95%
Notes payable due 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	5.75%	5.75%
The Black & Decker Corporation
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Convertible note not guaranteed	320.0
The Black & Decker Corporation | Notes payable due 2012
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	4.90%
The Black & Decker Corporation | Notes payable due 2013
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	6.15%
The Black & Decker Corporation | Notes payable due 2021
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	3.40%
The Black & Decker Corporation | Notes payable due 2014
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	4.75%
The Black & Decker Corporation | Notes 8 Point 95 Percent Due 2014
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	8.95%
The Black & Decker Corporation | Notes payable due 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Interest rate	5.75%