Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2014 years	Dec. 29, 2013
Commitments and Contingencies Disclosure [Abstract]
Accrual for Environmental Loss Contingencies, Component Amount	$ (2.3)	$ 5.7
Management's estimate of total cost of ultimate disposition of known environmental matters	$ 12.3	$ 13.5
Number of years over which estimated environmental cost will be paid	10