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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Income Taxes [Line Items]
Provision for income taxes	$ 37.9	$ 39.3
Effective tax rate	25.80%	22.60%
Consolidated income before provision for income taxes	146.8	174.0
Tax benefits related to research and development credits	$ 6.3
U.S. federal statutory income tax rate	35.00%	35.00%

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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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

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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