Executive Officers' Separation and Hiring Costs (Details) - Executive Officer [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 28, 2014	Jun. 28, 2014	Jul. 04, 2015
Separation and Hiring Costs [Line Items]
Executive officers' separation and hiring, period costs	$ 0.8	$ 2.8
Supplemental Unemployment Benefits, Severance Benefits			$ 0.4

Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Postemployment Benefits

-URI http://asc.fasb.org/extlink&oid=6519534

Name:	us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant