Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

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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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

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- Definition

The premium (cost) of a hedge, expensed during the period.

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No definition available.

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- Definition

Fixed interest rate related to the interest rate derivative.

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No definition available.

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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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Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu).

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Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of price risk derivatives not designated 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)
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Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (d)
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Nominal or face amount used to calculate payments on a nonderivative instrument.

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No definition available.

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Amount, after tax, of cumulative translation adjustment attributable to gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900

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Pre-tax cumulative adjustment resulting from gains and losses on foreign currency derivatives that are designated as, and are effective as, hedges of a net investment in a foreign entity, commencing as of the designation date. Adjustment reported in equity as part of accumulated other comprehensive income.

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No definition available.

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Derivative Financial Instruments (Textuals) (Details) € in Millions, ¥ in Millions, DKK in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 EUR (€) MBbls	Sep. 30, 2017 JPY (¥)	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($) MBbls	Sep. 30, 2017 DKK MBbls	Dec. 31, 2016 EUR (€) MBbls
Forward Start Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount					$ 33.1
Maximum term (in years)		5 years	5 years	5 years
Derivative, underlying basis		one-month London Interbank Offered Rate (“LIBOR”)	one-month London Interbank Offered Rate (“LIBOR”)	one-month London Interbank Offered Rate (“LIBOR”)
Fixed interest rate		5.41%			5.41%	5.41%
Debt EUR Denominated [Member]
Derivative [Line Items]
Notional amount, nonderivative instruments		€ 21.0		$ 24.8
Cumulative foreign currency translation gain					$ 1.0
Cumulative foreign currency translation gain, net of tax					0.6
Debt Yen Denominated [Member]
Derivative [Line Items]
Notional amount, nonderivative instruments			¥ 500.0	4.5
Cumulative foreign currency translation gain					0.3
Cumulative foreign currency translation gain, net of tax					$ 0.2
Options Held [Member]
Derivative [Line Items]
Derivative, nonmonetary notional amount \| MBbls		17,550			17,550	17,550	96,525
Premium paid				0.2
Loss related to call options	$ 0.1			$ 0.2
Euro Member Countries, Euro \| Forward Contracts [Member]
Derivative [Line Items]
Notional amount \| €		€ 72.5					€ 57.5
Denmark, Kroner \| Forward Contracts [Member]
Derivative [Line Items]
Notional amount \| DKK						DKK 83.4
Long [Member] \| Designated as Hedging Instrument [Member] \| Singapore, Dollars \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount					$ 29.9
Long [Member] \| Designated as Hedging Instrument [Member] \| United States of America, Dollars \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount					46.3
Long [Member] \| Designated as Hedging Instrument [Member] \| Japan, Yen \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount					5,255.3
Short [Member] \| Designated as Hedging Instrument [Member] \| Singapore, Dollars \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount		6.2			14.6
Short [Member] \| Designated as Hedging Instrument [Member] \| United States of America, Dollars \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount		41.8			0.0
Short [Member] \| Designated as Hedging Instrument [Member] \| Japan, Yen \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount		€ 16.6			$ 28.3