The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

Name:	us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Income Taxes (Textual) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Income Taxes (Textual) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Examination [Line Items]
2018 GRC Final Decision	$ 80	$ 0	$ 80	$ 0
California Franchise Tax Board \| Tax years 1994 to 2006
Income Tax Examination [Line Items]
IRS refund expected					$ 65
Southern California Edison
Income Tax Examination [Line Items]
2018 GRC Final Decision	$ 80	$ 0	$ 80	$ 0