Risk Management (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 25, 2016	Dec. 31, 2015	Dec. 31, 2014
Trading Activity, Gains and Losses, Net [Line Items]
Description of Foreign Currency Exposure		.19
Foreign Currency Transaction Gain (Loss), before Tax	$ 0.4		$ 1.2	$ 1.0