XML 40 R32.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Investments (Tables) - Southern California Edison | 9 Months Ended
--- | ---
Sep. 30, 2015
Investment [Line Items] |
Amortized Cost and Fair Value of the Trust Investments | The following table sets forth amortized cost and fair value of the trust investments:
| Longest Maturity Dates |  | Amortized Cost |  | Fair Value
(in millions) |  | September 30, 2015 |  | December 31, 2014 |  | September 30, 2015 |  | December 31, 2014
Stocks | — |  | $ | 386 |  |  | $ | 524 |  |  | $ | 1,559 |  |  | $ | 2,031 |
Municipal bonds | 2054 |  | 726 |  |  | 681 |  |  | 860 |  |  | 822 |
U.S. government and agency securities | 2045 |  | 1,069 |  |  | 777 |  |  | 1,141 |  |  | 836 |
Corporate bonds | 2057 |  | 668 |  |  | 346 |  |  | 721 |  |  | 395 |
Short-term investments and receivables/payables 1 | One-year |  | 104 |  |  | 692 |  |  | 107 |  |  | 715 |
Total |  |  | $ | 2,953 |  |  | $ | 3,020 |  |  | $ | 4,388 |  |  | $ | 4,799 |
1 | Short-term investments include $112 million of repurchase agreements payable by financial institutions which earn interest, are fully secured by U.S. Treasury securities and mature by October 7, 2015.
Summary of Changes in the Fair Value of Trust | The following table sets forth a summary of changes in the fair value of the trust:
|  | Three months ended September 30, |  | Nine months ended September 30,
(in millions) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Balance at beginning of period |  | $ | 4,836 |  |  | $ | 4,740 |  |  | $ | 4,799 |  |  | $ | 4,494 |
Gross realized gains |  | 183 |  |  | 149 |  |  | 215 |  |  | 187 |
Gross realized losses |  | (10 | ) |  | — |  |  | (15 | ) |  | — |
Unrealized (losses) gains, net |  | (316 | ) |  | (131 | ) |  | (343 | ) |  | 38 |
Other-than-temporary impairments |  | (10 | ) |  | (4 | ) |  | (22 | ) |  | (10 | )
Interest and dividends |  | 28 |  |  | 28 |  |  | 88 |  |  | 90 |
Contributions |  | — |  |  | — |  |  | 7 |  |  | 6 |
Income taxes |  | — |  |  | (40 | ) |  | (14 | ) |  | (59 | )
Decommissioning disbursements |  | (319 | ) |  | — |  |  | (319 | ) |  | (1 | )
Administrative expenses and other |  | (4 | ) |  | (1 | ) |  | (8 | ) |  | (4 | )
Balance at end of period |  | $ | 4,388 |  |  | $ | 4,741 |  |  | $ | 4,388 |  |  | $ | 4,741 |

X
- Definition Schedule Of Amortized Cost And Fair Value Of Investments Held In Trust [Table Text Block] + References No definition available. + Details
Name: | eix_ScheduleOfAmortizedCostAndFairValueOfInvestmentsHeldInTrustTableTextBlock
Namespace Prefix: | eix_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of Changes in Fair Value of the Trust [Table Text Block] + References No definition available. + Details
Name: | eix_SummaryOfChangesInFairValueOfTheTrustTableTextBlock
Namespace Prefix: | eix_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | invest_InvestmentLineItems
Namespace Prefix: | invest_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=eix_SouthernCaliforniaEdisonCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |