Asset Impairments, Exit Costs And Other Charges (Exist And Restructuring-Related Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 117	$ 175
Charges Incurred	53	12
Cash Payments	(76)	(76)
Non-cash Settlements and Accretion	10	13
Currency and Other Adjustments	3	(7)
Ending Balance	107	117
Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4	13
Charges Incurred	25	6
Cash Payments	(17)	(12)
Currency and Other Adjustments		(3)
Ending Balance	12	4
Asset Impairments And Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Charges Incurred	2	1
Cash Payments
Non-cash Settlements and Accretion	(2)	(1)
Currency and Other Adjustments
Ending Balance
Lease And Contract Obligations [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	113	162
Charges Incurred	26	5
Cash Payments	(59)	(64)
Non-cash Settlements and Accretion	12	14
Currency and Other Adjustments	3	(4)
Ending Balance	$ 95	$ 113