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Cash Flows, Attributable To Projects, Equity Investors, Percent

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Derivative, Period After Project Completion

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Net Income (Loss) And Tax Credits Attributable To Projects Equity Investors, Second Period, Percent

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

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- Definition

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

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- Definition

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

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- Definition

Priority Return of Investment Projects, Equity Investors, Percent

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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
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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.

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No definition available.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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- Definition

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

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No definition available.

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- 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.

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- 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.

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- 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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Debt and Credit Agreements (Textual) (Details) - USD ($)	1 Months Ended		12 Months Ended
	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Carrying value		$ 12,123,000,000	$ 12,123,000,000	$ 11,156,000,000
Short-term debt		2,393,000,000	2,393,000,000	1,307,000,000
Line of credit
Debt Instrument [Line Items]
Borrowings from credit facility		500,000,000
Line of credit \| Subsequent event
Debt Instrument [Line Items]
Repayment on borrowings	$ 500,000,000
Multi-year credit facilities
Debt Instrument [Line Items]
Commitment		1,250,000,000	1,250,000,000
Outstanding borrowings		1,139,000,000	1,139,000,000	$ 538,000,000
Weighted average interest rate (as a percent)				0.97%
Outstanding letters of credit		0	0
Multi-year credit facilities \| Commercial paper
Debt Instrument [Line Items]
Outstanding borrowings		$ 639,000,000	$ 639,000,000
Weighted average interest rate (as a percent)		1.70%	1.70%
Indirect subsidiary of Edison Energy Group \| Non-recourse debt financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Carrying value		$ 31,000,000	$ 31,000,000	$ 22,000,000
Short-term debt		$ 16,000,000	$ 16,000,000
Weighted average interest rate on long term debt		4.50%	4.50%	4.86%
Remaining borrowings available		$ 67,000,000	$ 67,000,000
Indirect subsidiary of Edison Energy Group \| Non-recourse debt, 2 tax equity financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Remaining borrowings available		21,000,000	$ 21,000,000
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 third equity financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Remaining borrowings available		38,000,000	$ 38,000,000
Percentage of taxable profits and losses and tax credits			99.00%
Period following the completion of the portfolio of projects (term)			20 years
Taxable income and losses after the initial period			67.00%
Cash flows until certain conditions are met			28.40%
Indirect subsidiaries \| Non-recourse debt financing to support equity investments in solar rooftop projects
Debt Instrument [Line Items]
Carrying value		$ 10,000,000	$ 10,000,000	$ 10,000,000
Weighted average interest rate on long term debt		9.00%	9.00%	9.00%
SCE
Debt Instrument [Line Items]
Carrying value		$ 10,907,000,000	$ 10,907,000,000	$ 10,333,000,000
Short-term debt		$ 1,238,000,000	$ 1,238,000,000	769,000,000
Weighted average interest rate (as a percent)		2.56%	2.56%
SCE \| Line of credit
Debt Instrument [Line Items]
Borrowings from credit facility		$ 500,000,000
SCE \| Line of credit \| Subsequent event
Debt Instrument [Line Items]
Repayment on borrowings	500,000,000
SCE \| Multi-year credit facilities
Debt Instrument [Line Items]
Commitment		2,750,000,000	$ 2,750,000,000
Outstanding borrowings		$ 1,238,000,000	$ 1,238,000,000
Weighted average interest rate (as a percent)		2.46%	2.46%
Outstanding letters of credit		$ 99,000,000	$ 99,000,000
SCE \| Multi-year credit facilities \| Commercial paper
Debt Instrument [Line Items]
Outstanding borrowings				$ 769,000,000
Weighted average interest rate (as a percent)		1.75%	1.75%	0.90%
SCE \| Multi-year credit facilities \| Letters of credit
Debt Instrument [Line Items]
Outstanding letters of credit		$ 99,000,000	$ 99,000,000
SCE \| Commercial paper supported by SCE's credit facility \| Commercial paper
Debt Instrument [Line Items]
Outstanding borrowings		$ 738,000,000	$ 738,000,000
Edison International Parent and Other \| Term Loan Agreement \| Subsequent event
Debt Instrument [Line Items]
Debt, face amount	$ 500,000,000
Basis points	60.00%