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Derivative - Notional Amounts (Details) MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) MMBTU	Dec. 31, 2017 USD ($) MMBTU
Derivative
Derivative, Loss on Derivative	$ 12.0
Foreign Exchange Contract
Derivative
Derivative, notional amount	$ 2,091.7	$ 813.5
Debt Fix-to-Float Interest Rate Swap Contract
Derivative
Number of Interest Rate Derivatives Held	5	4
Derivative, notional amount	$ 275.0	$ 310.0
Debt Pre-Issuance and Fix-To-Float Interest Rate Swap Contracts
Derivative
Derivative, notional amount	$ 585.0	$ 585.0
Commodity Contract (MMbtu)
Derivative
Derivative, nonmonetary notional amount | MMBTU	52.2	43.0

X

- Definition

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

+ 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

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

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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- Definition

Amount of decrease in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
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