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

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

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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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.

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The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Net assets associated with foreign currency derivatives	$ (6.5)		$ (6.5)		$ 6.8
Maturity period of derivatives (in months)			18 months
Estimated amount of net gains (losses) associated with derivative instruments, net of tax, in next twelve months			$ (2.3)
Designated as Hedging Instrument \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	212.1		212.1
Designated as Hedging Instrument \| United Kingdom, Pounds \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	82.5		82.5
Designated as Hedging Instrument \| Australia, Dollars \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	69.2		69.2
Designated as Hedging Instrument \| Euro Member Countries, Euro \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	24.2		24.2
Designated as Hedging Instrument \| Brazil, Brazil Real \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	14.9		14.9
Designated as Hedging Instrument \| Singapore, Dollars \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	14.5		14.5
Designated as Hedging Instrument \| No currency \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	6.8		6.8
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivatives not designated as hedging instruments	(9.3)	$ 5.7	(7.5)	$ 6.2
Not Designated as Hedging Instrument \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	153.2		153.2
Not Designated as Hedging Instrument \| United Kingdom, Pounds \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	6.5		6.5
Not Designated as Hedging Instrument \| Australia, Dollars \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	22.2		22.2
Not Designated as Hedging Instrument \| Indonesia, Rupiahs \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	11.6		11.6
Not Designated as Hedging Instrument \| Euro Member Countries, Euro \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	96.8		96.8
Not Designated as Hedging Instrument \| Brazil, Brazil Real \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	8.4		8.4
Not Designated as Hedging Instrument \| No currency \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 7.7		$ 7.7