Financial Instruments (Financial Instruments Measured On Recurring Basis Using Significant Unobservable Input Level 3) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Sep. 25, 2010	Oct. 01, 2011	Sep. 25, 2010
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 52	$ 108	$ 57	$ 159
Redemption at par	(8)	(43)	(14)	(91)
Gain (loss) included in net income (loss)	1	2	2	3
Change in fair value included in other comprehensive income (loss)		(3)		(7)
Ending balance	45	64	45	64
UBS Put Option [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		1		2
Gain (loss) included in net income (loss)		$ (1)		$ (2)