v2.4.0.8

Litigation, Environmental and Other Contingencies Federal Energy Regulatory Commission Proceedings (Details) (Various Shippers [Member], Unfavorable Regulatory Action [Member], Federal Energy Regulatory Commission [Member], Regulated Operation [Member], USD $) In Millions, unless otherwise specified |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2014 Repreations, Refunds, and Rate Reductions [Member] Pending Litigation [Member] SFPP [Member] | Mar. 31, 2014 Annual Rate Reductions [Member] Pending Litigation [Member] SFPP [Member] | Mar. 31, 2014 Revenue Subject to Refund [Member] Pending Litigation [Member] SFPP [Member] | Mar. 31, 2014 2008 rate case and the 2010 rate case [Member] Opinion 517 issued and implemented (rehearing pending); and Opinion 528 issued and is awaiting filing of court document) [Member] EPNG [Member] | Oct. 17, 2013 Pro Forma [Member] EPNG 2010 Rate Case [Member] Pending Litigation [Member] EPNG [Member]
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Period of Time Litigation Concerns | 2 years |  |  |  |
Loss Contingency, Damages Sought, Value |  | $ 20.00 | $ 100.00 |  |
Loss Contingency, Pending Claims, Number |  |  |  | 2 |
Litigation, Court Order, Document Filing Period |  |  |  |  | 60 days

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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