Restructuring, Impairment And Integration Charges (Summary Of Productivity Plan Activity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 24, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ (7)
Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2011	276
Restructuring and impairment charges	33
Cash payments	(44)
Non-cash charges	(17)
Liability as of March 24, 2012	248
Productivity Plan [Member] | Severance And Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2011	249
Restructuring and impairment charges	(2)
Cash payments	(24)
Liability as of March 24, 2012	223
Productivity Plan [Member] | Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	17
Non-cash charges	(17)
Productivity Plan [Member] | Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2011	27
Restructuring and impairment charges	18
Cash payments	(20)
Liability as of March 24, 2012	$ 25