Regulation and Rates	3 Months Ended
Mar. 31, 2012
Notes to Financial Statements [Abstract]
Regulatory Matters	5. Regulation and Rates In October 2011, Trunkline and Sea Robin jointly filed with FERC to transfer all of Trunkline's offshore facilities, and certain related onshore facilities, by abandonment and sale to Sea Robin to consolidate and streamline the ownership and operation of all regulated offshore assets under one entity and better position the offshore assets competitively. Several parties have filed interventions and protests of this filing. The Company is responding to information requests from FERC on this filing. The transfer is subject to approval by FERC. In November 2011, FERC commenced an audit of PEPL to evaluate its compliance with the Uniform System of Accounts as prescribed by FERC, annual and quarterly financial reporting to FERC, reservation charge crediting policy and record retention. The audit is related to the period from January 1, 2010 to present and is estimated to take approximately one year to complete.

Regulation and Rates

3 Months Ended

Mar. 31, 2012

Notes to Financial Statements [Abstract]

5. Regulation and Rates

In October 2011, Trunkline and Sea Robin jointly filed with FERC to transfer all of Trunkline's offshore facilities, and certain related onshore facilities, by abandonment and sale to Sea Robin to consolidate and streamline the ownership and operation of all regulated offshore assets under one entity and better position the offshore assets competitively. Several parties have filed interventions and protests of this filing. The Company is responding to information requests from FERC on this filing. The transfer is subject to approval by FERC.

In November 2011, FERC commenced an audit of PEPL to evaluate its compliance with the Uniform System of Accounts as prescribed by FERC, annual and quarterly financial reporting to FERC, reservation charge crediting policy and record retention. The audit is related to the period from January 1, 2010 to present and is estimated to take approximately one year to complete.