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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Aug. 26, 2012	Aug. 28, 2011	Nov. 27, 2011
Income Tax Disclosure [Abstract]
Effective rate	36.20%	31.80%
Unrecognized tax benefits	$ 145.8		$ 143.4
Unrecognized tax benefits that could impact effective tax rate	$ 93.1		$ 87.9

- 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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