Summary of Significant Accounting Policies Unredeemed Gift Cards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Accounting Policies [Abstract]
Gift Card Liability, Current	$ 18.4	$ 18.4	$ 18.1
Revenue Recognition, Gift Cards, Breakage	$ 0.9	$ 0.7	$ 0.7