Contingencies (Details) € in Thousands, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 27, 2015 USD ($)	Jun. 27, 2015 EUR (€)	Dec. 31, 2012 USD ($)
Site Contingency [Line Items]
Litigation Settlement, Gross			$ 110,000
Environmental Costs Recovered	$ 37,000
Huntsville Site [Member]
Site Contingency [Line Items]
Environmental Remediation Expense To Date	4,000
Additional Expected Project Expenditures Low Estimate	3,000
Additional Expected Project Expenditures High Estimate	4,000
Huntsville Site [Member] | Investigation Report [Member]
Site Contingency [Line Items]
Additional Expected Project Expenditures Low Estimate	500
Additional Expected Project Expenditures High Estimate	750
Norco Site [Member] | Remediation, Project Management, Regulatory Oversight, and Investigative and Feasability Studies [Member]
Site Contingency [Line Items]
Environmental Remediation Expense To Date	48,000
Additional Expected Project Expenditures Low Estimate	16,300
Additional Expected Project Expenditures High Estimate	$ 24,500
Tekelec Matter [Member]
Site Contingency [Line Items]
Loss Contingency, Range of Possible Loss, Maximum | €		€ 11,333
Loss Contingency Damages Sought Value | €		3,742
Loss Contingency, Expenses Sought, Value | €		€ 312