Summary of Significant Accounting Policies Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2016	Jan. 02, 2016
Accounting Policies [Abstract]
Capitalized Indirect Costs	$ 19.3	$ 19.7
Inventory Valuation Reserves	(2.1)	(2.3)
Inventory, Reserve for Estimated Inventory Market Value Below Cost	$ (4.7)	$ (4.5)