Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 29, 2012	Sep. 29, 2012
Fair Value Measurement [Line Items]
Cash and cash equivalents, fair value	$ 300,000	$ 300,000
Cost-method equity investments in non-publicly traded securities	19,600,000	16,000,000
2007 Notes [Member]
Fair Value Measurement [Line Items]
The aggregate principal amount of the Convertible Notes	775,000,000
2010 Notes [Member]
Fair Value Measurement [Line Items]
The aggregate principal amount of the Convertible Notes	450,000,000
2012 Notes [Member]
Fair Value Measurement [Line Items]
The aggregate principal amount of the Convertible Notes	500,000,000
Credit Agreement [Member]
Fair Value Measurement [Line Items]
Borrowed principal under Credit Agreement	2,480,000,000
Convertible Notes [Member]
Fair Value Measurement [Line Items]
Convertible Notes	1,570,000,000	1,560,000,000
The aggregate principal amount of the Convertible Notes	$ 1,725,000,000	$ 1,725,000,000

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 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 Company 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.

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This element represents the aggregate carrying amount of all cost-method investments held by the Company. Generally, such investments do not have readily determinable fair values and are not required to be accounted for by the equity method. The carrying amount of such securities equates to cost, adjusted for other-than-temporary impairment. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries, particularly foreign.

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