Defined Benefit Pension Plan (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0.3	$ 0.2	$ 0.2
Net funding deficiency of the Benefit Plan	$ 0.5	$ 0.4	$ 0.3