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Commitments And Contingencies (Narrative) (Details) $ in Millions | 9 Months Ended
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Oct. 01, 2017 USD ($)
Purchase Obligation [Line Items] |
Lease Expiration Date | Dec. 31, 2026
Purchase Commitment, Remaining Minimum Amount Committed | $ 143.7
Number of days for non-cancellation of purchase obligations prior to expected shipment date | 30 days
46 To 60 Days [Member] |
Purchase Obligation [Line Items] |
Percentage of cancelable orders. | 50.00%
31 To 45 Days [Member] |
Purchase Obligation [Line Items] |
Percentage of cancelable orders. | 25.00%
Minimum [Member] | 46 To 60 Days [Member] |
Purchase Obligation [Line Items] |
Required Notice Period Prior To The Expected Shipment Date | 46 days
Minimum [Member] | 31 To 45 Days [Member] |
Purchase Obligation [Line Items] |
Required Notice Period Prior To The Expected Shipment Date | 31 days
Maximum [Member] | 46 To 60 Days [Member] |
Purchase Obligation [Line Items] |
Required Notice Period Prior To The Expected Shipment Date | 60 days
Maximum [Member] | 31 To 45 Days [Member] |
Purchase Obligation [Line Items] |
Required Notice Period Prior To The Expected Shipment Date | 45 days
ITALY | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2004
ITALY | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2012

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