Capital and Treasury Stock - Changes in Treasury Stock (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Changes in Treasury Stock Shares Outstanding [Roll Forward]
Treasury Stock, Balance, Shares	413,332	364,681	336,620
Employee compensation and stock option plans, Shares	(25,508)	(30,839)	(24,413)
Treasury Stock, Ending Balance, Shares	437,318	413,332	364,681
Changes in treasury stock
Treasury Stock, Balance	$ 28,352	$ 22,684	$ 19,891
Employee compensation and stock option plans related to treasury stock	(3,156)	(3,311)	(2,497)
Repurchase of common stock, Amounts	6,358	8,979	5,290
Treasury Stock, Ending Balance	$ 31,554	$ 28,352	$ 22,684
Treasury Stock
Changes in Treasury Stock Shares Outstanding [Roll Forward]
Repurchase of common stock, Shares	49,494	79,490	52,474
Changes in treasury stock
Repurchase of common stock, Amounts	$ 6,358	$ 8,979	$ 5,290