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Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
The following table presents PacifiCorp's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions):
 
 
Input Levels for Fair Value Measurements
 
 
 
 
 
 
Level 1
 
Level 2
 
Level 3
 
Other(1) 
 
Total
As of March 31, 2015
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Commodity derivatives
 
$
—

 
$
9

 
$
2

 
$
(4
)
 
$
7

Money market mutual funds(2)
 
22

 
—

 
—

 
—

 
22

Investment funds
 
16

 
—

 
—

 
—

 
16

 
 
$
38

 
$
9

 
$
2

 
$
(4
)
 
$
45

 
 
 
 
 
 
 
 
 
 
 
Liabilities - Commodity derivatives
 
$
—

 
$
(145
)
 
$
—

 
$
68

 
$
(77
)
 
 
 
 
 
 
 
 
 
 
 
As of December 31, 2014
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Commodity derivatives
 
$
—

 
$
25

 
$
4

 
$
(11
)
 
$
18

Money market mutual funds(2)
 
30

 
—

 
—

 
—

 
30

 
 
$
30

 
$
25

 
$
4

 
$
(11
)
 
$
48

 
 
 
 
 
 
 
 
 
 
 
Liabilities - Commodity derivatives
 
$
—

 
$
(114
)
 
$
—

 
$
39

 
$
(75
)

(1)
Represents netting under master netting arrangements and a net cash collateral receivable of $64 million and $28 million as of March 31, 2015 and December 31, 2014, respectively.

(2)
Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. Money market mutual funds are accounted for as available-for-sale securities and the fair value approximates cost.
Fair Value, by Balance Sheet Grouping [Table Text Block]
PacifiCorp's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of PacifiCorp's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of PacifiCorp's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of PacifiCorp's long-term debt (in millions):

 
 
As of March 31, 2015
 
As of December 31, 2014
 
 
Carrying
 
Fair
 
Carrying
 
Fair
 
 
Value
 
Value
 
Value
 
Value
 
 
 
 
 
 
 
 
 
Long-term debt
 
$
7,019

 
$
8,563

 
$
7,019

 
$
8,358