Derivative Instrument and Hedging Activities (Details) (Predecessor, USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 25, 2012
Predecessor
Derivative
Gain Loss Reclassified into Income Interest Rate Hedges	$ 4

The value of gains (losses) from interest rate hedges, net transferred from accumulated other comprehensive income into earnings.

No definition available.

Name:	pepl_GainLossReclassifiedIntoIncomeInterestRateHedges
Namespace Prefix:	pepl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration