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Derivative Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Sep. 30, 2013 Foreign Currency Derivatives [Member]	Mar. 31, 2014 Refined Oil Products [Member] Commodity Derivative Contracts [Member]	Mar. 31, 2014 Minimum [Member] Foreign Currency Derivatives [Member]	Mar. 31, 2014 Minimum [Member] Commodity Derivative Contracts [Member]	Mar. 31, 2014 Maximum [Member] Foreign Currency Derivatives [Member]	Mar. 31, 2014 Maximum [Member] Commodity Derivative Contracts [Member]
Derivative [Line Items]
Outstanding derivative swap contracts					$ 23.2
Notional amounts of foreign currency derivatives				151.0
Derivative maturities						April 2014	April 2014	December 2014	June 2014
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value, Net	18.6		25.2
Gain (Loss) on Derivative Used in Net Investment Hedge, Net of Tax	$ 0.1	$ 1.6

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- Definition

Derivative maturities

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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

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959



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-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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- Definition

Amount of gain (loss) from the ineffectiveness of the hedge.

+ 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 (d)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959



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Net fair value of all derivatives designated as hedges of net investment in foreign operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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