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Variable Interest Entities (Textual) (Details) - Southern California Edison - Variable Interest Entity, Not Primary Beneficiary | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) $ / shares MW | Mar. 31, 2016 USD ($) | Dec. 31, 2016 MW
SCE Power Purchase Contracts |  |  |
Variable Interest Entity |  |  |
Power generating capacity (in megawatts) | MW | 4,928 |  | 4,383
Payments to unconsolidated VIEs for power purchase contracts | $ 140,000,000 | $ 127,000,000 |
Trust I |  |  |
Variable Interest Entity |  |  |
Common stock | $ 10,000 |  |
Trust I | Trust Securities |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.625% |  |
Liquidation preference | $ 475,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 25 |  |
Common stock | $ 10,000 |  |
Trust I | Series F Preferred Stock |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.625% |  |
Liquidation preference | $ 475,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |  |
Trust II |  |  |
Variable Interest Entity |  |  |
Common stock | $ 10,000 |  |
Trust II | Trust Securities |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.10% |  |
Liquidation preference | $ 400,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 25 |  |
Trust II | Series G Preferred Stock |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.10% |  |
Liquidation preference | $ 400,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |  |
Trust III |  |  |
Variable Interest Entity |  |  |
Common stock | $ 10,000 |  |
Trust III | Trust Securities |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.75% |  |
Liquidation preference | $ 275,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 25 |  |
Trust III | Series H Preferred Stock |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.75% |  |
Liquidation preference | $ 275,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |  |
Trust IV |  |  |
Variable Interest Entity |  |  |
Common stock | $ 10,000 |  |
Trust IV | Trust Securities |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.375% |  |
Liquidation preference | $ 325,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 25 |  |
Trust IV | Series J Preferred Stock |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.375% |  |
Liquidation preference | $ 325,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |  |
Trust IV | Series K Preferred Stock |  |  |
Variable Interest Entity |  |  |
Liquidation preference | $ 300,000,000 |  |
Trust V |  |  |
Variable Interest Entity |  |  |
Common stock | $ 10,000 |  |
Trust V | Trust Securities |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.45% |  |
Liquidation preference | $ 300,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 25 |  |
Trust V | Series K Preferred Stock |  |  |
Variable Interest Entity |  |  |
Security dividend rate, (as a percent) | 5.45% |  |
Liquidation preference | $ 300,000,000 |  |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |  |

X
- Definition Payments for electricity purchased during the reporting period under power purchase contracts with unconsolidated VIEs. + References No definition available. + Details
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- Definition Power generating capacity of the project owned and/or controlled by the entity. + References No definition available. + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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