Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Loss Contingencies [Line Items]
Operating lease rent expense	$ 25.3	$ 26.3	$ 22.9
Letters of credit	17.8
Environmental Remediation [Member]
Loss Contingencies [Line Items]
Environmental remediation reserve	$ 1.6	$ 1.7