Commitments And Contingencies (Legal And Regulatory Contingencies) (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Criminal investigation [Member]
Loss Contingencies [Line Items]
Penalty for each count of alleged violation	$ 500,000
Special assessment for each count of alleged violation	400
Total maximum penalties	6,000,000
PGE Corporation And Utility [Member]
Loss Contingencies [Line Items]
Accrued legal liabilities	43,000,000	43,000,000
Probable penalty amount	200,000,000	200,000,000
Number of CPUC investigative enforcement proceedings	3
Unrecognized Tax Benefits	360,000,000
Utility [Member]
Loss Contingencies [Line Items]
Number of self-reports filed with the CPUC	60
Disallowed capital expenditures		196,000,000	353,000,000
Amount of capital included in Property, Plant, and Equipment	340,000,000
Capitalized PSEP costs	766,000,000
Penalties recommended by various parties	2,250,000,000
Utility [Member] | State General Fund [Member]
Loss Contingencies [Line Items]
SED recommended penalty	300,000,000
Utility [Member] | Pipeline Safety Enhancement Plan Costs Previously Disallowed By C P U C [Member]
Loss Contingencies [Line Items]
SED recommended penalty	435,000,000
Utility [Member] | PSEP Costs Approved, Implementation of Operational Remedies, Future PSEP Costs [Member]
Loss Contingencies [Line Items]
SED recommended penalty	1,515,000,000
Utility [Member] | Minimum [Member]
Loss Contingencies [Line Items]
SED fines for self-reported violations	50,000
Utility [Member] | Maximum [Member]
Loss Contingencies [Line Items]
SED fines for self-reported violations	$ 16,800,000