Business and Summary of Significant Accounting Policies Advertising Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Advertising Expense	$ 194	$ 190	$ 181
Prepaid Expenses [Member]
Prepaid Advertising	$ 2	$ 1