Recent Accounting Standards New Standards Adopted (Details) - Subsequent Event [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncement, Early Adoption [Line Items]
Pre-tax adjustment for new accounting standard		$ 342
After-tax adjustment for new accounting standard		$ 176
Minimum [Member] \| PSE&G [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Estimated Change in Expense related to new presentation of pension and OPEB costs	$ 55
Maximum [Member] \| PSE&G [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Estimated Change in Expense related to new presentation of pension and OPEB costs	$ 65

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794

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