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Derivative Instruments and Hedging Activities (Narrative) (Details) € in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($) country	Dec. 31, 2016 USD ($)	Jan. 31, 2018 USD ($)	Jan. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)
Derivative Instruments, Gain (Loss) [Line Items]
Number of countries where products sold, countries (over 150) | country	150
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument, interest rate, percent	0.33%
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 148,000,000				$ 96,800,000
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	384,500,000				374,200,000		€ 312.0
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Cross Currency Interest Rate Contract, Payment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	302,800,000			€ 245.7
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Cross Currency Interest Rate Contract, Receipt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount			$ 300,000,000
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount						$ 300,000,000.0
Deferred gain on hedge termination		$ 7,300,000
Derivative, variable interest rate						4.14%	4.14%
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 1,404,400,000				$ 1,701,400,000

X

- Definition

Deferred Gain On Hedge Termination

+ References

No definition available.

+ Details

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- Definition

Number of countries where products sold.

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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- Definition

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.

+ References

No definition available.

+ Details

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