Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Income Taxes [Line Items]
Income taxes (benefit) on continuing operations	$ 28.8	$ 35.1	$ 116.7	$ 86.0
Effective tax rate	20.00%	17.80%	23.00%	14.30%
Anticipated tax costs related to ongoing operational and legal entity integrations	0	17.5	0	17.5
Other Tax Expense (Benefit)	$ 0			$ (69.2)

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The component of income tax expense representing amounts paid or payable (or refundable) which are classified as "income taxes" as determined by applying the provisions of enacted tax law to other than the taxable Income or Loss from continuing operations for the period. Items affecting income taxes and required to be disclosed, but not included elsewhere, would also be designated as "Other".

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