Risk Management and Hedging Activities Risk Management and Hedging Activities - Balance Sheet Location (Details) (Commodity Contract [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ (55)		$ (121)
Cash collateral receivable (payable)	12		55
Total derivatives - net basis	(43)		(66)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	10		8
Cash collateral receivable (payable)	0		0
Total derivatives - net basis	10		8
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	0		1
Cash collateral receivable (payable)	0		0
Total derivatives - net basis	0		1
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(27)		(104)
Cash collateral receivable (payable)	0		55
Total derivatives - net basis	(27)		(49)
Other Long-term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(38)		(26)
Cash collateral receivable (payable)	12		0
Total derivatives - net basis	(26)		(26)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	14	[1]	32	[1]
Commodity liabilities	(69)	[1]	(153)	[1]
Derivative, Fair Value, Net	(55)	[1]	(121)	[1]
Regulatory asset	55		121		264
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	11	[1]	10	[1]
Commodity liabilities	(1)	[1]	(2)	[1]
Derivative, Fair Value, Net	10	[1]	8	[1]
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	0	[1]	3	[1]
Commodity liabilities	0	[1]	(2)	[1]
Derivative, Fair Value, Net	0	[1]	1	[1]
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	2	[1]	18	[1]
Commodity liabilities	(29)	[1]	(122)	[1]
Derivative, Fair Value, Net	(27)	[1]	(104)	[1]
Not Designated as Hedging Instrument [Member] | Other Long-term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	1	[1]	1	[1]
Commodity liabilities	(39)	[1]	(27)	[1]
Derivative, Fair Value, Net	$ (38)	[1]	$ (26)	[1]

[1] PacifiCorp's commodity derivatives are generally included in rates and as of December 31, 2013 and 2012, a regulatory asset of $55 million and $121 million, respectively, was recorded related to the net derivative liability of $55 million and $121 million, respectively.