Capital and Treasury Stock - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Billions	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016	Oct. 13, 2015	Jul. 21, 2014
Equity, Class of Treasury Stock [Line Items]
Common stock, shares issued (in shares)	3,119,843	3,119,843	3,119,843
Cash dividends per share (in dollars per share)	$ 3.32	$ 3.15	$ 2.95
October 13, 2015 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount				$ 10.0
July 21, 2014 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 5.0