Contingencies (Details) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 28, 2015 USD ($)	Dec. 31, 2012 USD ($)	Mar. 28, 2015 Huntsville Site [Member] USD ($)	Mar. 28, 2015 Huntsville Site [Member] Investigation Report [Member] USD ($)	Mar. 28, 2015 Norco Site [Member] Remediation, Project Management, Regulatory Oversight, and Investigative and Feasability Studies [Member] USD ($)	Mar. 28, 2015 Tekelec Matter [Member] EUR (€)
Site Contingency [Line Items]
Litigation Settlement, Gross		$ 110,000
Environmental Costs Recovered	37,000
Environmental Remediation Expense To Date			4,000		47,000
Additional Expected Project Expenditures Low Estimate			3,000	500	16,800
Additional Expected Project Expenditures High Estimate			4,000	750	24,500
Loss Contingency, Range of Possible Loss, Maximum						11,333
Loss Contingency Damages Sought Value						3,742
Loss Contingency, Expenses Sought, Value						€ 312