Call Option, Period

No definition available.

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- Definition

Derivative, Period After Project Completion

+ References

No definition available.

+ Details

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- Definition

Net Income (Loss) and Cash Flows, Attributable To Projects, Equity Investors, Percent

+ References

No definition available.

+ Details

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- Definition

Net Income (Loss) and Tax Credits, Attributable To Projects, Equity Investors, Percent

+ References

No definition available.

+ Details

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- Definition

Net Income (Loss) and Tax Credits, Attributable To Projects, Equity Investors, Period

+ References

No definition available.

+ Details

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- Definition

Priority Return of Investment Projects, Equity Investors, Percent

+ References

No definition available.

+ Details

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- Definition

Short-term Debt, Expiration Period

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 942
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average interest rate of short-term debt outstanding.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Debt and Credit Agreements (Textual) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 31, 2017	Dec. 31, 2015
Debt Instrument [Line Items]
Carrying value	$ 11,156,000,000		$ 11,178,000,000
Multi-year credit facilities
Debt Instrument [Line Items]
Commitment	1,250,000,000
Outstanding borrowings	$ (538,000,000)		$ (646,000,000)
Weighted average interest rate (as a percent)	0.97%		0.78%
Outstanding letters of credit	$ 0
Indirect subsidiaries \| Non-recourse debt financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Carrying value	$ 22,000,000		$ 25,000,000
Debt instrument (term)	7 years
Weighted average interest rate on long term debt	3.50%		3.11%
Percentage of taxable profits and losses and tax credits	99.00%
Period following the completion of the portfolio of projects (term)	6 years
Priority return on investment (percent)	2.00%
Percentage of taxable profits and losses and cash flow	5.00%
Call option, period	9 months
Period after project completion	5 years
Indirect subsidiary of Edison Energy Group \| Non-recourse debt financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Carrying value	$ 10,000,000		$ 6,000,000
Weighted average interest rate on long term debt	9.00%		9.00%
SCE
Debt Instrument [Line Items]
Carrying value	$ 10,333,000,000		$ 10,539,000,000
SCE \| Multi-year credit facilities
Debt Instrument [Line Items]
Commitment	2,750,000,000
Outstanding borrowings	(769,000,000)
Outstanding letters of credit	(91,000,000)
SCE \| Agreement \| Subsequent event
Debt Instrument [Line Items]
Debt, face amount		$ 300,000,000
Interest rate on debt (as a percent)		1.483%
SCE \| Pollution-control bonds \| Subsequent event
Debt Instrument [Line Items]
Debt, face amount		$ 135,000,000
Interest rate on debt (as a percent)		2.625%
Commercial paper \| SCE \| Multi-year credit facilities
Debt Instrument [Line Items]
Outstanding borrowings	$ (769,000,000)		$ (49,000,000)
Weighted average interest rate (as a percent)	0.90%		0.51%
Letters of credit \| SCE \| Multi-year credit facilities
Debt Instrument [Line Items]
Outstanding letters of credit	$ (91,000,000)
Letters of credit expiration period	12 months