Restructuring, Impairment and Integration Charges (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring and impairment charges and other productivity initiatives	$ 311	$ 172	$ 320
Restructuring, Settlement and Impairment Provisions	295	160	230
Other Productivity Initiatives	16	12	90
2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring, Settlement and Impairment Provisions	295	160	169
2012 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring, Settlement and Impairment Provisions	$ 0	$ 0	$ 61