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Short-term Debt, Expiration Period

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

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

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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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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.

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

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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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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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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Weighted average interest rate of long-term debt outstanding.

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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.

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Debt and Credit Agreements (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) MW	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Carrying Value	$ 11,259,000,000			$ 10,738,000,000
Short-term debt	695,000,000			1,291,000,000
Credit Facility July 2020
Debt Instrument [Line Items]
Commitment	1,250,000,000
Outstanding borrowings	646,000,000
Outstanding letters of credit	0
Amount available	604,000,000
Non-recourse Solar Rooftop Project Equity Investment Financing
Debt Instrument [Line Items]
Carrying Value	$ 6,000,000			0
Weighted average interest rate on long term debt	9.00%
Debt Instrument, Face Amount				$ 80,000,000
Non-recourse Solar Rooftop Project Investment Financing
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)				2.67%
Carrying Value	$ 25,000,000			$ 5,100,000
Weighted average interest rate on long term debt	3.11%
Power generating capacity (in megawatts) \| MW	29
Debt Instrument, Term	7 years
Indirect Subsidiaries
Debt Instrument [Line Items]
Power generating capacity (in megawatts) \| MW	29
Debt Instrument, Term	7 years
Southern California Edison
Debt Instrument [Line Items]
Carrying Value	$ 10,616,000,000			9,924,000,000
Short-term debt	49,000,000			667,000,000
Southern California Edison \| Credit Facility July 2020
Debt Instrument [Line Items]
Commitment	2,750,000,000
Outstanding borrowings	49,000,000
Outstanding letters of credit	(125,000,000)
Amount available	$ 2,576,000,000
Southern California Edison \| Amortizing First and Refunding Mortgage Bonds Due in 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 550,000,000
Interest rate on debt (as a percent)			1.845%
Southern California Edison \| First and Refunding Mortgage Bonds Due in 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 325,000,000
Interest rate on debt (as a percent)			2.40%
Southern California Edison \| 1.875% Pollution-Control Bonds Due in 2029
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 56,000,000
Interest rate on debt (as a percent)		1.875%
Southern California Edison \| 1.875% Pollution-Control Bonds Due in 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 75,000,000
Interest rate on debt (as a percent)		1.875%
Southern California Edison \| First and Refunding Mortgage Bonds Due in 2045
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 425,000,000
Interest rate on debt (as a percent)			3.60%
Edison International
Debt Instrument [Line Items]
Outstanding borrowings				$ 619,000,000
Weighted average interest rate (as a percent)	0.78%			0.45%
Short-term debt	$ 646,000,000			$ 619,000,000
Edison International \| Credit Facility July 2020
Debt Instrument [Line Items]
Commitment	1,250,000,000
Commercial paper \| Southern California Edison \| Credit Facility July 2020
Debt Instrument [Line Items]
Outstanding borrowings	$ 49,000,000
Weighted average interest rate (as a percent)	0.51%			0.40%
Short-term debt				$ 367,000,000
Commercial paper \| Edison International
Debt Instrument [Line Items]
Outstanding borrowings	$ 646,000,000
Letters of credit \| Southern California Edison \| Credit Facility July 2020
Debt Instrument [Line Items]
Letters of credit expiration period	12 months