INCOME TAXES - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Mar. 12, 2010	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards		$ 891.0
U.S. federal capital loss carry forward		808.5
U.S. federal capital loss carry forward, expiration year		2015
U.S. foreign tax credit carry forwards		69.6
Research and development tax credit carry forwards		7.2
Valuation allowance		552.6	300.4
Net income tax paid		248.4	114.7	83.6
U.S. federal refunds		50.6	74.6	77.4
Reduction of tax expense due to tax holidays		3.1	3.5	2.9
Tax holiday expiration year in China		2015
Repatriate foreign earnings	1,636.1
Deferred tax liability		436.9
Unrecognized tax benefits that would affect the effective tax rate		179.4	185.4
Penalties and interest related to unrecognized tax benefits		7.6	(14.2)	(6.5)
Total penalties and interest		33.5	25.9
Recognized tax benefit		49.0	73.4	36.0
Reasonably possible change in income tax expense, lower bound		3
Reasonably possible change in income tax expense, upper bound		8
The Black & Decker Corporation
Operating Loss Carryforwards [Line Items]
Undistributed foreign earnings		$ 3,902.0