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Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

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-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

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- Definition

The cash outflow for the settlement of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, as it matures.

+ References

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

-Publisher FASB

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-Topic 230

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-Section 45

-Paragraph 15

-Subparagraph (b)

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-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2015	May 08, 2015	May 07, 2015
EPO Senior Notes I [Member]
Debt Obligations [Abstract]
Repayment of senior notes	$ 250.0
Subsequent Event [Member] \| EPO Senior Notes OO [Member]
Debt Obligations [Abstract]
Aggregate debt principal issued			750.0
Interest Rate, stated percentage (in hundredths)			1.65%
Debt issued as percent of principal amount (in hundredths)		99.881%
Maturity Date		May 07, 2018
Subsequent Event [Member] \| EPO Senior Notes PP [Member]
Debt Obligations [Abstract]
Aggregate debt principal issued			875.0
Interest Rate, stated percentage (in hundredths)			3.70%
Debt issued as percent of principal amount (in hundredths)		99.635%
Maturity Date		Feb. 15, 2026
Subsequent Event [Member] \| EPO Senior Notes QQ [Member]
Debt Obligations [Abstract]
Aggregate debt principal issued			875.0
Interest Rate, stated percentage (in hundredths)			4.90%
Debt issued as percent of principal amount (in hundredths)		99.635%
Maturity Date		May 15, 2046
Subsequent Event [Member] \| EPO Senior Notes X [Member]
Debt Obligations [Abstract]
Repayment of senior notes		400.0
Subsequent Event [Member] \| Senior Notes [Member]
Debt Obligations [Abstract]
Aggregate debt principal issued			$ 2,500.0