Condensed Consolidating Financial Information (Narrative) (Details) - Mar. 31, 2015 - USD ($) $ in Millions	Total
Condensed Financial Statements, Captions [Line Items]
Guarantor Obligations, Current Carrying Value	$ 1,050
Genesis NEJD Pipeline, LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Percentage of equity interest	100.00%

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant