Fair Value Measurements And Financial Instruments (Details) (USD $)	Jul. 02, 2011	Jan. 01, 2011
Assets
Money-market securities	$ 594,794,000	$ 364,418,000
Trading marketable securities	223,014,000	190,438,000
Available-for-sale marketable securities	34,984,000	33,745,000
Total assets	852,792,000	588,601,000
Interest rate swap	2,257,000	10,046,000
Total liabilities	2,257,000	10,046,000
Carrying value of cost method investments in equity securities	126,000,000	124,000,000
Aggregate fair value fixed-rate debt obligations	2,490,800,000
Aggregate carrying value fixed-rate debt obligations	2,414,200,000
Aggregate carrying value other debt obligations	152,300,000
Fair Value, Inputs, Level 1 [Member]
Assets
Money-market securities	594,794,000	364,418,000
Trading marketable securities	223,014,000	190,438,000
Available-for-sale marketable securities	34,984,000	33,745,000
Total assets	852,792,000	588,601,000
Interest rate swap
Total liabilities
Fair Value, Inputs, Level 2 [Member]
Assets
Money-market securities
Trading marketable securities
Available-for-sale marketable securities
Total assets
Interest rate swap	2,257,000	10,046,000
Total liabilities	2,257,000	10,046,000
Fair Value, Inputs, Level 3 [Member]
Assets
Money-market securities
Trading marketable securities
Available-for-sale marketable securities
Total assets
Interest rate swap
Total liabilities

Fixed rate debt obligations carrying value.

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Fixed rate debt obligations fair value disclosure.

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Securities that include funds traded in active markets and recorded at fair value based on quoted market prices.

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Carrying value of other debt obligations (excluding fixed-rate senior notes).

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- Definition

Total assets measured at fair value on a recurring basis.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Section 25
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-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
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-Paragraph 6
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 10
-Subparagraph i
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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