Income Taxes (Reserves Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	$ 1,885	$ 1,547
Additions for tax positions related to the current year	309	349
Additions for tax positions from prior years	86	139
Reductions for tax positions from prior years	(51)	(70)
Settlement payments	(4)	(26)
Statutes of limitations expiration	(33)	(27)
Translation and other	20	(27)
Balance, end of period	$ 2,212	$ 1,885