Hedging Transactions And Derivative Financial Instruments (Schedule Of Amounts Included In Accumulated Other Comprehensive Income (Loss) Related To Foreign Currency Forward Contracts) (Details) (Foreign Currency Forward Contracts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010
Cash Flow Hedging [Member]
Hedging Transactions And Derivative Financial Instruments [Line Items]
Other comprehensive loss	$ (8)
Research And Development [Member] | Cash Flow Hedging [Member]
Hedging Transactions And Derivative Financial Instruments [Line Items]
Amount of gain (loss) on foreign currency forward contracts reclassified from accumulated other comprehensive income	2	3
Marketing, General And Administrative [Member] | Cash Flow Hedging [Member]
Hedging Transactions And Derivative Financial Instruments [Line Items]
Amount of gain (loss) on foreign currency forward contracts reclassified from accumulated other comprehensive income	1	2
Other Expense, Net [Member] | Non Designated [Member]
Hedging Transactions And Derivative Financial Instruments [Line Items]
Other expenses, net	$ 5	$ (13)