Income Tax (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Mar. 30, 2012	Apr. 01, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Effective tax rate	28.00%	33.00%	28.00%	28.00%
Deferred tax liability related to amortization of intangible assets					$ 11.0
Unrecognized tax benefits, gross	14.4		14.4
Unrecognized tax benefits if recognized, would affect our effective tax rate	8.1		8.1
Licensing revenue withholding tax remittances	$ 10.2	$ 7.6	$ 21.4	$ 15.9

The cumulative amount of the estimated future tax effects attributable to the difference between the tax basis of intangible assets and the basis of intangible assets computed in accordance with generally accepted accounting principles. The difference in basis, whether due to amortization or other reasons, will increase future taxable income when such difference reverses. Intangible assets include, but are not limited to, assets such as patents, trademarks and customer lists.

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- 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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