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Compensation and Benefit Plans (Nonvested Performance Share Activity) (Details) - Performance shares | 12 Months Ended
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Dec. 31, 2017 $ / shares shares
Shares |
Beginning balance (number of shares) | 207,497
Granted (number of shares) | 81,874
Forfeited (number of shares) | (53,002)
Vested (number of shares) | (57,247)
Ending balance (number of shares) | 179,122
Weighted-Average Grant Date Fair Value |
Beginning balance, weighted average grant date fair value (dollars per share) | $ / shares | $ 84.30
Ending balance, weighted average grant date fair value (dollars per share) | $ / shares | $ 63.85
SCE |
Shares |
Beginning balance (number of shares) | 96,667
Granted (number of shares) | 42,569
Forfeited (number of shares) | (25,061)
Vested (number of shares) | (26,427)
Affiliate transfers, net (number of shares) | 974
Ending balance (number of shares) | 88,722
Weighted-Average Grant Date Fair Value |
Beginning balance, weighted average grant date fair value (dollars per share) | $ / shares | $ 84.25
Ending balance, weighted average grant date fair value (dollars per share) | $ / shares | $ 64.01

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Affiliate Transfers Net + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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