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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		15 Months Ended
	Sep. 29, 2012	Sep. 29, 2012	Oct. 01, 2011	Oct. 01, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Effective tax rate	24.50%	27.40%	30.10%	30.30%
Unrecognized tax benefits	$ 5.8	$ 5.8			$ 7.1

- Definition

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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