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Derivative Instruments (Balance Sheet Disclosures) (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets | $ 103 |  | $ 122 |
Long-Term, Derivative Assets | 245 |  | 251 |
Short-Term, Derivative Liabilities | 154 |  | 152 |
Long-Term, Derivative Liabilities | 947 |  | 1,042 |
Southern California Edison |  |  |  |
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets | 103 |  | 122 |
Long-Term, Derivative Assets | 245 |  | 251 |
Short-Term, Derivative Liabilities | 154 |  | 152 |
Long-Term, Derivative Liabilities | 947 |  | 1,042 |
Southern California Edison | Electric Utility | Economic hedges |  |  |  |
Derivatives |  |  |  |
Collateral Already Posted, Aggregate Fair Value | 0 |  |  |
Southern California Edison | Commodity Contracts | Electric Utility |  |  |  |
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets | 103 |  | 122 |
Long-Term, Derivative Assets | 245 |  | 251 |
Derivative Assets, Total | 348 |  | 373 |
Short-Term, Derivative Liabilities | 154 |  | 152 |
Long-Term, Derivative Liabilities | 947 |  | 1,042 |
Derivative Liabilities, Total | 1,101 |  | 1,194 |
Net Liability | 753 |  | 821 |
Southern California Edison | Commodity Contracts | Electric Utility | Economic hedges |  |  |  |
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets | 103 |  | 141 |
Long-Term, Derivative Assets | 245 |  | 251 |
Derivative Assets, Total | 348 |  | 392 |
Short-Term, Derivative Liabilities | 159 |  | 178 |
Long-Term, Derivative Liabilities | 948 |  | 1,045 |
Derivative Liabilities, Total | 1,107 |  | 1,223 |
Net Liability | 759 |  | 831 |
Southern California Edison | Commodity Contracts | Electric Utility | Netting and Collateral |  |  |  |
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets |  |  | (19) |
Long-Term, Derivative Assets |  |  | 0 |
Derivative Assets, Total |  |  | (19) |
Short-Term, Derivative Liabilities |  |  | (19) |
Long-Term, Derivative Liabilities |  |  | 0 |
Derivative Liabilities, Total |  |  | (19) |
Net Liability |  |  | 0 |
Southern California Edison | Commodity Contracts | Electric Utility | Cash Collateral Posted |  |  |  |
Fair Value of Derivative Instruments |  |  |  |
Short-Term, Derivative Assets | 0 | [1] | 0 | [1]
Long-Term, Derivative Assets | 0 | [1] | 0 | [1]
Derivative Assets, Total | 0 | [1] | 0 | [1]
Short-Term, Derivative Liabilities | (5) | [1] | (7) | [1]
Long-Term, Derivative Liabilities | (1) | [1] | (3) | [1]
Derivative Liabilities, Total | (6) | [1] | (10) | [1]
Net Liability | (6) | [1] | (10) | [1]
Other Current Assets | Southern California Edison | Commodity Contracts |  |  |  |
Derivatives |  |  |  |
Collateral Already Posted, Aggregate Fair Value | $ 6 |  | $ 19 |
[1] | In addition, at September 30, 2014 and December 31, 2013, SCE had posted $6 million and $19 million, respectively, of collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624258-113959 + Details
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