Debt and Credit Agreements (Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Current portion of long-term debt	$ (2,614)	$ (1,077)
Long-term debt	27,025	24,170
Edison International Parent and Other
Debt Instrument [Line Items]
Current portion of long-term debt	(400)	(700)
Unamortized debt discount/premium and issuance costs, net	(19)	(13)
Long-term debt	2,981	2,437
Edison International Parent and Other \| Debentures and notes
Debt Instrument [Line Items]
Long-term debt	$ 3,400	3,150
Edison International Parent and Other \| Debentures and notes \| Minimum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	2.95%
Edison International Parent and Other \| Debentures and notes \| Maximum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	6.95%
SCE
Debt Instrument [Line Items]
Current portion of long-term debt	$ (2,214)	(377)
Unamortized debt discount/premium and issuance costs, net	(149)	(113)
Long-term debt	24,044	21,733
SCE \| Debentures and notes
Debt Instrument [Line Items]
Long-term debt	$ 306	306
SCE \| Debentures and notes \| Minimum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	5.06%
SCE \| Debentures and notes \| Maximum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	6.65%
SCE \| First and refunding mortgage bonds
Debt Instrument [Line Items]
Long-term debt	$ 23,900	20,314
SCE \| First and refunding mortgage bonds \| Minimum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	0.70%
SCE \| First and refunding mortgage bonds \| Maximum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	6.05%
SCE \| Pollution-control bonds
Debt Instrument [Line Items]
Long-term debt	$ 752	752
SCE \| Pollution-control bonds \| Minimum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	1.45%
SCE \| Pollution-control bonds \| Maximum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	2.63%
SCE \| Series 2021-A senior secured recovery bonds
Debt Instrument [Line Items]
Long-term debt	$ 849	333
SCE \| Series 2021-A senior secured recovery bonds \| Minimum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	0.86%
SCE \| Series 2021-A senior secured recovery bonds \| Maximum
Debt Instrument [Line Items]
Interest rate on debt (as a percent)	3.24%
SCE \| Other long-term debt
Debt Instrument [Line Items]
Long-term debt	$ 600	$ 518

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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Amount of unamortized debt discount (premium) and debt issuance costs.

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

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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