Reportable Segments (Net sales to external customers and long-lived assets) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Net sales	$ 3,514	$ 3,639	$ 3,685	$ 3,742	$ 3,501	$ 3,716	$ 3,714	$ 3,861	$ 14,580	$ 14,792	$ 14,197
Property, net	3,769				3,856				3,769	3,856	3,782
United States [Member]
Net sales									8,876	9,060	8,875
Property, net	2,283				2,343				2,283	2,343	2,427
All Other Countries [Member]
Net sales									5,704	5,732	5,322
Property, net	$ 1,486				$ 1,513				$ 1,486	$ 1,513	$ 1,355