Note 2 - Fair Value Measurements (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Apr. 01, 2012
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 12.3	$ 3.0

Net of tax amount of the appreciation (loss) in the value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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