Restructuring, Impairment And Integration Charges (Schedule Of Merger And Integration Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Restructuring Cost and Reserve [Line Items]
Merger and integration charges	$ 329	$ 808	$ 50
Cash payments	(377)	(385)	(49)
Non-cash charges	(103)	(219)	50
Liability	53	204
Severance And Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Merger and integration charges	146	396
Cash payments	(191)	(114)
Non-cash charges	(88)	(103)
Liability	46	179
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Merger and integration charges	34	132
Non-cash charges	(34)	(132)
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Merger and integration charges	149	280
Cash payments	(186)	(271)
Non-cash charges	19	16
Liability	$ 7	$ 25