For an unclassified balance sheet, this item represents investments in debt and equity securities which are categorized neither as held-to-maturity nor trading.

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+ Details

- Definition

Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

+ References

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

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-Number 210

-Section 02

-Paragraph 1

-Article 5

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+ Details

Note 6. Cash, Cash Equivalents, Marketable Securities, and Investments (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 25, 2010	Sep. 30, 2011	Sep. 25, 2010	Dec. 31, 2010	Dec. 26, 2009
Investment [Line Items]
Cash and cash equivalents	$ 621,216,000	$ 678,560,000	$ 621,216,000	$ 765,689,000	$ 664,499,000
Marketable securities and investments		116,209,000		348,160,000
Total cash, cash equivalents, marketable securities, and investments		794,769,000		1,113,849,000
Available-for-sale securities, gross realized gains	200,000	900,000	900,000
Available-for-sale securities, gross realized losses	100,000		600,000
Cash [Member]
Investment [Line Items]
Cash and cash equivalents		673,798,000		742,200,000
Commercial Paper [Member]
Investment [Line Items]
Cash and cash equivalents		0		1,200,000
Money Market Funds [Member]
Investment [Line Items]
Cash and cash equivalents		4,762,000		22,289,000
Certificates of Deposit [Member]
Investment [Line Items]
Marketable securities and investments		1,301,000		0
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Investment [Line Items]
Marketable securities and investments		1,400,000		13,343,000
Corporate Debt Securities [Member]
Investment [Line Items]
Marketable securities and investments		29,861,000		98,602,000
Federal Agency Debt [Member]
Investment [Line Items]
Marketable securities and investments		40,233,000		45,875,000
Foreign Agency Debt [Member]
Investment [Line Items]
Marketable securities and investments		13,091,000		133,165,000
Foreign Government Obligations [Member]
Investment [Line Items]
Marketable securities and investments		5,581,000		9,143,000
Supranational Debt [Member]
Investment [Line Items]
Marketable securities and investments		22,726,000		48,032,000
US Government Debt Securities [Member]
Investment [Line Items]
Marketable securities and investments		$ 2,016,000		$ 0