Risk Management and Hedging Activities Risk Management and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

Risk Management and Hedging Activities [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of PacifiCorp's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

	Other						Other			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total
As of March 31, 2013
Not designated as hedging contracts(1):
Commodity assets	$	7		$	2		$	12		$	1		$	22
Commodity liabilities	(1		)	(1		)	(83		)	(19		)	(104		)
Total	6			1			(71		)	(18		)	(82		)
Total derivatives	6			1			(71		)	(18		)	(82		)
Cash collateral receivable	—			—			33			—			33
Total derivatives - net basis(2)	$	6		$	1		$	(38	)	$	(18	)	$	(49	)
As of December 31, 2012
Not designated as hedging contracts(1):
Commodity assets	$	10		$	3		$	18		$	1		$	32
Commodity liabilities	(2		)	(2		)	(122		)	(27		)	(153		)
Total	8			1			(104		)	(26		)	(121		)
Total derivatives	8			1			(104		)	(26		)	(121		)
Cash collateral receivable	—			—			55			—			55
Total derivatives - net basis(3)	$	8		$	1		$	(49	)	$	(26	)	$	(66	)

(1) PacifiCorp's commodity derivatives are generally included in rates and as of March 31, 2013 and December 31, 2012, a regulatory asset of $82 million and $121 million, respectively, was recorded related to the net derivative liability of $82 million and $121 million, respectively.

(2) Under master netting arrangements, as of March 31, 2013, PacifiCorp had the right to offset $3 million of payables with current derivative assets and $5 million of receivables with current derivative liabilities upon counterparty default.

(3) Under master netting arrangements, as of December 31, 2012, PacifiCorp had the right to offset $6 million of receivables and $1 million of letters of credit with current derivative liabilities upon counterparty default.

Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts [Table Text Block]

The following table reconciles the beginning and ending balances of PacifiCorp's regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in regulatory assets, as well as amounts reclassified to earnings (in millions):

	Three-Month Periods
	Ended March 31,
	2013			2012
Beginning balance	$	121		$	264
Changes in fair value recognized in regulatory assets	(19		)	52
Net gains reclassified to operating revenue	1			14
Net losses reclassified to energy costs	(21		)	(46		)
Ending balance	$	82		$	284

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of (in millions):

	Unit of	March 31,		December 31,
	Measure	2013		2012
Electricity sales	Megawatt hours	(1	)	(1	)
Natural gas purchases	Decatherms	67		74
Fuel oil purchases	Gallons	12		16