The increase or decrease in carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Debt Instrument Maturity

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Payment of Accrued Interest and Fees

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Decrease for amounts repaid on the debt instrument for the period.

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Net increase or decrease in the carrying amount of the debt instrument for the period.

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Interest rate stated in the contractual debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment.

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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Sep. 25, 2010	Oct. 01, 2011	Sep. 25, 2010
5.75% Convertible Senior Notes Due 2012 [Member]
Debt Instrument [Line Items]
Stated percentage of debt instrument	5.75%	5.75%	5.75%	5.75%
Maturity date of senior notes	2012	2012	2012	2012
Short term debt	$ 485		$ 485
6.00% Convertible Senior Notes Due 2015 [Member]
Debt Instrument [Line Items]
Decrease for amounts repaid on the debt instrument for the period	150
Stated percentage of debt instrument	6.00%		6.00%
Maturity date of senior notes	2015
Cash paid for repurchase of convertible senior notes	153
Payment of accrued interest and fees	2
The decrease in carrying amount of the equity component of convertible debt, which may be settled in cash upon conversion, for the period	8
The decrease in carrying amount of the debt instrument for the period	141
Loss on repurchase of debt	5
Remaining carrying amount of senior notes	591		591
Debt discount, net	$ 39		$ 39