Compensation and Benefit Plans (Changes Recognized in OCI) (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension and Other Postretirement Benefits
Net (gain) loss	$ (10)	$ 11	$ 19
Amortization of net loss	(11)	(10)	(7)
Total (gain) loss recognized in other comprehensive income	(21)	1	12
Total recognized in expense and other comprehensive income	27	59	82
SCE
Pension and Other Postretirement Benefits
Net (gain) loss	(5)	9	21
Amortization of net loss	(7)	(7)	(5)
Total (gain) loss recognized in other comprehensive income	(12)	2	16
Total recognized in expense and other comprehensive income	$ 32	$ 56	$ 80

This element represents the aggregate amount recognized in net periodic benefit cost and other comprehensive income.

No definition available.

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- 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.

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- Definition

Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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- Definition

Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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