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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Income Taxes [Line Items] |  |  |  |
Gross unrecognized tax benefits | $ 54,500,000 |  |  |
Amount of tax benefits that, if recognized, would impact the effective tax rate | 38,600,000 |  |  |
Payment of penalties | 3,100,000 |  | 900,000 |
Payment of interest expense | 19,500,000 |  | 5,900,000 |
Deferred taxes on undistributed earnings of certain subsidiaries | 21,000,000 |  |  |
Tax loss carryforwards | 1,460,900,000 |  |  |
Deferred tax assets, valuation allowance | 167,640,000 | [1] | 13,242,000 | [1]
Non-U.S. tax losses available for carry forward | 903,400,000 |  |  |
U.S. federal loss available for carry forward | 367,100,000 |  |  |
State tax losses available for carry forward | 190,400,000 |  |  |
Tax benefits recorded as an increase in equity | 6,200,000 |  |  |
Shared Tax Liabilities description | Costs and expenses associated with the management of Shared Tax Liabilities, Distribution Taxes and BHS Tax Liabilities will generally be shared 20% by us, 27.5% by ADT and 52.5% by Tyco. |  |  |
Percentage of Shared Tax Liabilities | 20.00% |  |  |
Minimum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Possible amount of decrease during the next twelve months primarily as a result of the resolution of federal, state and foreign examinations and the expiration of various statutes of limitations | 0 |  |  |
Maximum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Possible amount of decrease during the next twelve months primarily as a result of the resolution of federal, state and foreign examinations and the expiration of various statutes of limitations | 36,900,000 |  |  |
Expire in future years | 2032 |  |  |
2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Shared Tax Liabilities description | Tyco is responsible for the first $500 million of Shared Tax Liabilities. We and ADT will share 42% and 58%, respectively, of the next $225 million of Shared Tax Liabilities. We, ADT and Tyco will share 20%, 27.5% and 52.5%, respectively, of Shared Tax Liabilities above $725 million. |  |  |
Next $225 million of Shared Tax Liabilities | 2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 42.00% |  |  |
Tax Liabilities above $725 million | 2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 20.00% |  |  |
Foreign Country |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax assets, valuation allowance | $ 163,800,000 |  |  |
Operating losses expiration period | Subject to varying expiration periods and will begin to expire in 2013 |  |  |
ADT |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 27.50% |  |  |
ADT | Next $225 million of Shared Tax Liabilities | 2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 58.00% |  |  |
ADT | Tax Liabilities above $725 million | 2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 27.50% |  |  |
Tyco |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 52.50% |  |  |
Tyco | Tax Liabilities above $725 million | 2012 Tax Sharing Agreement |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of Shared Tax Liabilities | 52.50% |  |  |
[1] | The increase in valuation allowance from 2011 to 2012 was primarily related to balances acquired in the Merger.

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