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Compensation and Benefit Plans (Unrecognized Compensation Costs) (Details) - Stock options $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Pension and Other Postretirement Benefits |
Unrecognized compensation cost, net of expected forfeitures | $ 15
Weighted-average period (in years) | 2 years 4 months 24 days
SCE |
Pension and Other Postretirement Benefits |
Unrecognized compensation cost, net of expected forfeitures | $ 8
Weighted-average period (in years) | 2 years 2 months 12 days

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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