Restructuring, Impairment and Integration Charges (Schedule of Merger and Integration Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Restructuring Reserve [Roll Forward]
Liability at beginning of period	$ 105	$ 204
Merger and integration costs	16	329	808
Cash payments	(83)	(377)	(385)
Non-cash charges	(14)	(51)	(219)
Liability at end of period	24	105	204
Severance And Other Employee Costs [Member]
Restructuring Reserve [Roll Forward]
Liability at beginning of period	98	179
Merger and integration costs	(3)	146	396
Cash payments	(65)	(191)	(114)
Non-cash charges	(12)	(36)	(103)
Liability at end of period	18	98	179
Asset Impairments [Member]
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	0
Merger and integration costs	1	34	132
Cash payments	0	0	0
Non-cash charges	(1)	(34)	(132)
Liability at end of period	0	0	0
Other Costs [Member]
Restructuring Reserve [Roll Forward]
Liability at beginning of period	7	25
Merger and integration costs	18	149	280
Cash payments	(18)	(186)	(271)
Non-cash charges	(1)	19	16
Liability at end of period	$ 6	$ 7	$ 25