Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Aggregate net fair value of all derivative instruments designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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Derivative Instruments (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Oct. 01, 2017 USD ($)	Sep. 30, 2018 USD ($)	Oct. 01, 2017 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt						$ 834.5	$ 1,068.2
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments in hedges, at fair value						0.1
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Income (expense) related to derivative instruments not designated as cash flow hedges recognized in other income and expense	$ 3.1	$ (4.8)	$ (14.7)	$ (1.7)
Foreign Exchange Forward \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Expected reclassification of gain (loss) over the next 12 months						0.2
Foreign Exchange Forward \| Designated as Hedging Instrument \| Sell US Dollars and Buy Canadian Dollars
Derivative Instruments, Gain (Loss) [Line Items]
Amount of foreign currency contract						102.0
Currency Swap \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Expected reclassification of gain (loss) over the next 12 months						(2.1)
Term Loan Due Oct 2019 \| Term Loans
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt					€ 93.0	100.0
e2v Limited UK \| Foreign Exchange Forward \| Designated as Hedging Instrument \| Sell US Dollars and Buy Great Britain Pounds
Derivative Instruments, Gain (Loss) [Line Items]
Amount of foreign currency contract						$ 18.3