Equity	9 Months Ended
Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Equity	Note 14. Equity Common Stock Issuances Edison International did not issue any shares during the three and nine months ended September 30, 2021 through its "at-the-market" ("ATM") program established in May 2019. Under the ATM program, Edison International may sell shares of its common stock having an aggregate sales price of up to $1.5 billion. As of September 30, 2021, shares of common stock having an aggregate offering price of $1.3 billion remained available to be sold under the ATM program. Edison International has no obligation to sell the remaining available shares. Edison International continued to settle its ongoing common stock requirements of various internal programs through issuance of new common stock. During the three months ended September 30, 2021, 52,100 shares of common stock were purchased by employees through the 401(k) defined contribution savings plan for net cash receipts of $3 million, 54,970 shares of common stock were issued as stock compensation awards for net cash receipts of $2 million and 77,468 shares of new common stock were issued in lieu of distributing $5 million to shareholders opting to receive dividend payments in the form of additional common stock. In June 2021, Edison International discontinued the issuance of new Edison International stock through the 401(k) defined contribution savings plan. During the three months ended September 30, 2021, stock purchases by employees through the 401(k) defined contribution savings plan were dividend payments made in the form of additional common stock. During the nine months ended September 30, 2021, 465,400 shares of common stock were purchased by employees through the 401(k) defined contribution savings plan for net cash receipts of $27 million, 267,564 shares of common stock were issued as stock compensation awards for net cash receipts of $7 million, 225,383 shares of new common stock were issued in lieu of distributing $13 million to shareholders opting to receive dividend payments in the form of additional common stock and 21,792 shares of common stock related to optional cash investments of $1 million. Equity Contributions In the three and nine months ended September 30, 2021, SCE received a total of $83 million and $1.3 billion in capital contributions from Edison International Parent, respectively, to support SCE's capital program, maintain the equity portion of SCE's capital structure at authorized levels and for general corporate purposes. Preferred Stock Issuance In March 2021, Edison International issued 1,250,000 shares of 5.375% Fixed-Rate Reset Cumulative Perpetual Preferred Stock, Series A, with a liquidation value of $1,000 per share (the "Series A preferred stock"). The dividends are payable on a semi-annual basis, commencing September 15, 2021. The dividend rate will be reset every five years beginning on March 15, 2026 to equal the then-current five-year U.S. Treasury rate plus a spread of 4.698%. The net proceeds of $1.2 billion were used to repay commercial paper borrowings and for general corporate purposes, including making a $575 million equity contribution to SCE. Edison International may, at its option, redeem the Series A preferred stock in whole or in part during certain period of time prior to each of the dividend reset date at a price equal to $1,000 per share plus any accumulated and unpaid dividends. Edison International may also, at its option, redeem the Series A preferred stock in whole but not in part at a price equal to $1,020 per share plus any accumulated and unpaid dividends within a certain period of time following any change in the criteria rating agencies use that would have adverse effects on the equity credit attributed by rating agencies to the Series A preferred stock. The Series A preferred stock ranks senior to Edison International's common stock with respect to dividends rights and distribution rights upon liquidation. The Series A preferred stock is not subject to any mandatory sinking fund, retirement fund, purchase fund or other similar provisions. Holders of the shares of Series A preferred stock do not have the right to require Edison International to repurchase or redeem shares of the Series A preferred stock.

Equity

9 Months Ended

Sep. 30, 2021

Stockholders' Equity Note [Abstract]

Note 14. Equity

Common Stock Issuances

Edison International did not issue any shares during the three and nine months ended September 30, 2021 through its "at-the-market" ("ATM") program established in May 2019. Under the ATM program, Edison International may sell shares of its common stock having an aggregate sales price of up to $1.5 billion. As of September 30, 2021, shares of common stock having an aggregate offering price of $1.3 billion remained available to be sold under the ATM program. Edison International has no obligation to sell the remaining available shares.

Edison International continued to settle its ongoing common stock requirements of various internal programs through issuance of new common stock. During the three months ended September 30, 2021, 52,100 shares of common stock were purchased by employees through the 401(k) defined contribution savings plan for net cash receipts of $3 million, 54,970 shares of common stock were issued as stock compensation awards for net cash receipts of $2 million and 77,468 shares of new common stock were issued in lieu of distributing $5 million to shareholders opting to receive dividend payments in the form of additional common stock. In June 2021, Edison International discontinued the issuance of new Edison International stock through the 401(k) defined contribution savings plan. During the three months ended September 30, 2021, stock purchases by employees through the 401(k) defined contribution savings plan were dividend payments made in the form of additional common stock.

During the nine months ended September 30, 2021, 465,400 shares of common stock were purchased by employees through the 401(k) defined contribution savings plan for net cash receipts of $27 million, 267,564 shares of common stock were issued as stock compensation awards for net cash receipts of $7 million, 225,383 shares of new common stock were issued in lieu of distributing $13 million to shareholders opting to receive dividend payments in the form of additional common stock and 21,792 shares of common stock related to optional cash investments of $1 million.

Equity Contributions

In the three and nine months ended September 30, 2021, SCE received a total of $83 million and $1.3 billion in capital contributions from Edison International Parent, respectively, to support SCE's capital program, maintain the equity portion of SCE's capital structure at authorized levels and for general corporate purposes.

Preferred Stock Issuance

In March 2021, Edison International issued 1,250,000 shares of 5.375% Fixed-Rate Reset Cumulative Perpetual Preferred Stock, Series A, with a liquidation value of $1,000 per share (the "Series A preferred stock"). The dividends are payable on a semi-annual basis, commencing September 15, 2021. The dividend rate will be reset every five years beginning on March 15, 2026 to equal the then-current five-year U.S. Treasury rate plus a spread of 4.698%. The net proceeds of $1.2 billion were used to repay commercial paper borrowings and for general corporate purposes, including making a $575 million equity contribution to SCE.

Edison International may, at its option, redeem the Series A preferred stock in whole or in part during certain period of time prior to each of the dividend reset date at a price equal to $1,000 per share plus any accumulated and unpaid dividends. Edison International may also, at its option, redeem the Series A preferred stock in whole but not in part at a price equal to $1,020 per share plus any accumulated and unpaid dividends within a certain period of time following any change in the criteria rating agencies use that would have adverse effects on the equity credit attributed by rating agencies to the Series A preferred stock.

The Series A preferred stock ranks senior to Edison International's common stock with respect to dividends rights and distribution rights upon liquidation. The Series A preferred stock is not subject to any mandatory sinking fund, retirement fund, purchase fund or other similar provisions. Holders of the shares of Series A preferred stock do not have the right to require Edison International to repurchase or redeem shares of the Series A preferred stock.