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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 |

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- Definition Allocated General Corporate Expenses + References No definition available. + Details
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- Details
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- Definition Payments of Dividends To Related Parties + References No definition available. + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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