Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount

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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

+ References

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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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Summary of Significant Accounting Policies (New Accounting Guidance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	$ 81
Accounting standards update on debt issuance costs \| Other long-term assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs		$ (81)
Accounting standards update on debt issuance costs \| Long-term debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs		81
Accounting standards update to simplify the accounting for share-based payments \| Early adoption using modified retrospective approach
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax expense	28
Accounting standards update to simplify the accounting for share-based payments \| Retained Earnings \| Early adoption using modified retrospective approach
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment		42
SCE
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	71
SCE \| Other long-term assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	7	7
SCE \| Long-term debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	71	77
SCE \| Accounting standards update on debt issuance costs \| Other long-term assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs		(77)
SCE \| Accounting standards update on debt issuance costs \| Long-term debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs		77
SCE \| Accounting standards update to simplify the accounting for share-based payments \| Early adoption using modified retrospective approach
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax expense	$ 13
SCE \| Accounting standards update to simplify the accounting for share-based payments \| Retained Earnings \| Early adoption using modified retrospective approach
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment		$ 6