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Compensation and Benefit Plans (Expense Components) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Postretirement Benefits Other Than Pensions |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |  |
Service cost | $ 11 |  | $ 14 |  | $ 22 |  | $ 28 |
Interest cost | 27 |  | 26 |  | 54 |  | 52 |
Expected return on plan assets | (28) |  | (30) |  | (56) |  | (60) |
Special Termination Benefits | 0 | [1] | 10 | [1] | 0 | [1] | 10 | [1]
Amortization of prior service cost | (9) |  | (9) |  | (18) |  | (18) |
Amortization of net loss | 0 |  | 7 |  | 0 |  | 14 |
Expense under accounting standards | 1 |  | 18 |  | 2 |  | 26 |
Pension Plans |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |  |
Service cost | 29 |  | 38 |  | 59 |  | 76 |
Interest cost | 48 |  | 42 |  | 93 |  | 84 |
Expected return on plan assets | (60) |  | (57) |  | (117) |  | (114) |
Settlement costs | 0 | [2] | 49 | [2] | 0 | [2] | 49 | [2]
Amortization of prior service cost | 2 |  | 1 |  | 3 |  | 2 |
Amortization of net loss | 1 | [3] | 15 | [3] | 2 | [3] | 30 | [3]
Expense under accounting standards | 20 |  | 88 |  | 40 |  | 127 |
Regulatory adjustment | 30 |  | (31) |  | 61 |  | (14) |
Total expense recognized | 50 |  | 57 |  | 101 |  | 113 |
Net loss reclassified | 1 |  | 4 |  | 3 |  | 7 |
Southern California Edison | Postretirement Benefits Other Than Pensions |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |  |
Service cost | 11 |  | 14 |  | 22 |  | 27 |
Interest cost | 27 |  | 26 |  | 54 |  | 52 |
Expected return on plan assets | (28) |  | (30) |  | (56) |  | (60) |
Special Termination Benefits | 0 | [1] | 10 | [1] | 0 | [1] | 10 | [1]
Amortization of prior service cost | (9) |  | (9) |  | (18) |  | (18) |
Amortization of net loss | 0 |  | 7 |  | 0 |  | 14 |
Expense under accounting standards | 1 |  | 18 |  | 2 |  | 25 |
Southern California Edison | Pension Plans |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |  |
Service cost | 29 |  | 37 |  | 58 |  | 74 |
Interest cost | 44 |  | 41 |  | 88 |  | 82 |
Expected return on plan assets | (56) |  | (57) |  | (112) |  | (114) |
Settlement costs | 0 | [2] | 48 | [2] | 0 | [2] | 48 | [2]
Amortization of prior service cost | 1 |  | 1 |  | 2 |  | 2 |
Amortization of net loss | 1 | [3] | 14 | [3] | 1 | [3] | 28 | [3]
Expense under accounting standards | 19 |  | 84 |  | 37 |  | 120 |
Regulatory adjustment | 30 |  | (31) |  | 61 |  | (14) |
Total expense recognized | 49 |  | 53 |  | 98 |  | 106 |
Net loss reclassified | $ 1 |  | $ 3 |  | $ 2 |  | $ 5 |
[1] | Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.
[2] | Relates to lump-sum payments made to employees who retired in 2013 from the SCE Retirement Plan (primarily due to workforce reductions described below).
[3] | Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $1 million and $1 million, respectively, for the three months ended June 30, 2014, and $3 million and $2 million, respectively, for the six months ended June 30, 2014. The amount reclassified for Edison International and SCE was $4 million and $3 million, respectively, for the three months ended June 30, 2013, and $7 million and $5 million, respectively, for the six months ended June 30, 2013.

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- Definition The difference between the period's pension costs calculated for GAAP and ratemaking purposes, which is deferred as a regulatory adjustment. + References No definition available. + Details
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- Definition The amount of gains or losses recognized in net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512136 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512171 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Service Cost (Component of Net Periodic Pension Cost) -URI http://asc.fasb.org/extlink&oid=6525008 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Termination Benefits -URI http://asc.fasb.org/extlink&oid=6526498 + Details
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