Background and Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended		12 Months Ended
	Jan. 03, 2012	Oct. 03, 2011	Dec. 31, 2011
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Dividend to Former Parent	$ 6.0	$ 48.9	$ 548.9
Former Parent
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Allocated general corporate expenses			23.4
Home and Security
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Number of Home & Security common share Former Parent receiving for each common share		1
Dividend to Former Parent		$ 500.0