Derivatives And Hedging Activities (Gains And Losses On Derivative Instruments) (Details) (PGE Corporation Utility Member, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
PGE Corporation Utility Member
Unrealized (loss) gain - regulatory assets and liabilities	$ 124	[1]	$ 238	[1]	$ 391	[1]
Realized loss-cost of electricity	(83)	[2]	(178)	[2]	(486)	[2]
Realized loss-cost of natural gas	(8)	[2]	(22)	[2]	(38)	[2]
Total commodity risk instruments	$ 33		$ 38		$ (133)

[1] Unrealized gains and losses on commodity risk-related derivative instruments are recorded to regulatory assets or liabilities, rather than being recorded to the Consolidated Statements of Income. These amounts exclude the impact of cash collateral postings.

[2] These amounts are fully passed through to customers in rates. Accordingly, net income was not impacted by realized amounts on these instruments.