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Income Taxes (Income Tax Carry Forward) (Details)
$ in Millions
Dec. 28, 2018
USD ($)
Federal [Member]  
Operating Loss Carryforwards [Line Items]  
Net operating loss $ 39.1
Federal [Member] | Foreign Tax Credit Carryforward [Member]  
Operating Loss Carryforwards [Line Items]  
Tax Credit 17.0
International [Member]  
Operating Loss Carryforwards [Line Items]  
Net operating loss 31.1
US and State [Member] | Research Tax Credit Carryforward [Member]  
Operating Loss Carryforwards [Line Items]  
Tax Credit 3.6
State [Member]  
Operating Loss Carryforwards [Line Items]  
Net operating loss 130.6
State [Member] | Investment Tax Credit Carryforward [Member]  
Operating Loss Carryforwards [Line Items]  
Tax Credit $ 6.8