Income Taxes (Narrative) (Detail)	12 Months Ended
Dec. 31, 2016
Income Taxes [Line Items]
Bonus depreciation for tax purposes	50.00%
Current ITC rate for qualified property	30.00%
Bonus Depreciation for Tax Purposes 2018	40.00%
Bonus Depreciation for Tax Purposes 2019	30.00%
2020 ITC rate for qualified property	26.00%
2021 ITC rate for qualified property	22.00%
PSEG [Member]
Income Taxes [Line Items]
Federal income tax rate	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	9.00%

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration