Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held-for-sale	$ 28,000,000	$ 30,000,000
PSEG Power [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
ZEC Charge per kwh	0.004
ZEC Charge per MWh	10
Assets Held-for-sale	$ 28,000,000	$ 28,000,000

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220

Name:	us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant