New And Significant Accounting Policies (Narrative) (Detail)	Sep. 30, 2014
Public Utility, Property, Plant and Equipment [Line Items]
Number of tax equity agreements	4

Number of tax equity agreements PG&E Corporation affiliates previously entered into to fund residential and commercial retail solar energy installations with four separate privately held funds that were considered VIEs.

No definition available.

Name:	pcg_NumberOfTaxEquityAgreements
Namespace Prefix:	pcg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant