Restructuring, Impairment and Integration Charges (Summary of Productivity Plan Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Restructuring Cost and Reserve [Line Items]
Other Productivity Initiatives	$ 12	$ 90	$ 67
Other Productivity Initiatives, After Tax		$ 66	$ 54
Other Productivity Initiatives, Net of Tax, Per Share Amount		$ 0.04	$ 0.04
Restructuring Reserve [Roll Forward]
Cash payments for restructuring charges	(43)	$ (57)	$ (3)
Liability at end of period	$ 29
2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment provisions, after-tax impact per share	$ 0.09	$ 0.09	$ 0.17
Restructuring Charges After Tax	$ 131	$ 134	$ 262
Restructuring Reserve [Roll Forward]
Non-cash charges	(50)	(38)	(110)
2014 Productivity Plan | Severance And Other Employee Costs
Restructuring Reserve [Roll Forward]
Non-cash charges	(15)	(11)	(33)
2014 Productivity Plan | Asset Impairments
Restructuring Reserve [Roll Forward]
Non-cash charges	(36)	(24)	(73)
2014 Productivity Plan | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Non-cash charges	1	$ (3)	$ (4)
2012 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment provisions, after-tax impact per share		$ 0.03	$ 0.04
Restructuring Charges After Tax		$ 50	$ 54
Restructuring Reserve [Roll Forward]
Non-cash charges	(8)	(11)	(12)
2012 Productivity Plan | Severance And Other Employee Costs
Restructuring Reserve [Roll Forward]
Non-cash charges	(7)	(8)	(6)
2012 Productivity Plan | Asset Impairments
Restructuring Reserve [Roll Forward]
Non-cash charges	0	(4)	(6)
2012 Productivity Plan | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Non-cash charges	$ (1)	1
Corporate
Restructuring Cost and Reserve [Line Items]
Other Productivity Initiatives		17
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Other Productivity Initiatives		48	11
ESSA
Restructuring Cost and Reserve [Line Items]
Other Productivity Initiatives		5	26
AMENA
Restructuring Cost and Reserve [Line Items]
Other Productivity Initiatives		$ 20	$ 30