Securities - Additional Information (Detail) (Auction Rate Securities, USD $) In Millions, unless otherwise specified	3 Months Ended
Jun. 28, 2009	Dec. 27, 2008
Auction Rate Securities
Investment Holdings [Line Items]
Other-than-temporary loss		$ 19.0
Loss attributable to credit loss	15.5
Cumulative adjustment attributable to changes in the interest rate	$ 3.5

This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.M)

-URI http://asc.fasb.org/extlink&oid=27011274&loc=d3e87990-122713

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration