Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating Revenues		$ 9,800		$ 9,722	$ 9,603
Depreciation and Amortization		1,100		1,216	1,285
Operating Income (Loss)		1,381		(856)	2,270
Income from Equity Method Investments		14		16	14
Interest Income		31		20	25
Interest Expense		(628)		(571)	(600)
Income (Loss) before Income Taxes		1,002		(1,089)	2,301
Income Tax Expense (Benefit)		(29)		(441)	396
Net Income (Loss)	[1]	1,031		(648)	1,905
Gross Additions to Long-Lived Assets		2,888		2,719	2,923
Total Assets		48,718		48,999	50,050
Investments in Equity Method Subsidiaries		306		173	64
Public Service Electric and Gas Company
Segment Reporting Information [Line Items]
Operating Revenues		7,935		7,122	6,608
PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues	[2]	3,266		3,767	4,229
Gain (loss) on sale, net of tax		(92)		(2,158)	86
Retained Earnings [Member]
Segment Reporting Information [Line Items]
Net Income (Loss)		1,031		(648)	1,905
Operating Segments [Member] | Public Service Electric and Gas Company
Segment Reporting Information [Line Items]
Operating Revenues		7,935		7,122	6,608
Depreciation and Amortization		935		928	887
Operating Income (Loss)		1,892		1,818	1,639
Income from Equity Method Investments		0		0	0
Interest Income		19		14	17
Interest Expense		(427)		(402)	(388)
Income (Loss) before Income Taxes		1,832		1,770	1,567
Income Tax Expense (Benefit)		267		324	240
Net Income (Loss)		1,565		1,446	1,327
Gross Additions to Long-Lived Assets		2,590		2,447	2,507
Total Assets		39,960		37,198	35,581
Investments in Equity Method Subsidiaries		0		0	0
Operating Segments [Member] | PSEG Power & Other
Segment Reporting Information [Line Items]
Operating Revenues		3,266		3,767	4,229
Depreciation and Amortization		165		288	398
Operating Income (Loss)		(511)		(2,674)	631
Income from Equity Method Investments		14		16	14
Interest Income		13		6	10
Interest Expense		(202)		(169)	(214)
Income (Loss) before Income Taxes		(830)		(2,859)	734
Income Tax Expense (Benefit)		(296)		(765)	156
Net Income (Loss)	[1]	(534)		(2,094)	578
Gross Additions to Long-Lived Assets		298		272	416
Total Assets		9,285		12,258	14,988
Investments in Equity Method Subsidiaries		306		173	64
non trading commodity mark to market gains (losses), net of tax		(457)		(446)	(58)
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	[3]	(1,401)		(1,167)	(1,234)
Depreciation and Amortization	[3]	0		0	0
Operating Income (Loss)	[3]	0		0	0
Income from Equity Method Investments	[3]	0		0	0
Interest Income	[3]	(1)		0	(2)
Interest Expense	[3]	1		0	2
Income (Loss) before Income Taxes	[3]	0		0	0
Income Tax Expense (Benefit)	[3]	0		0	0
Net Income (Loss)	[3]	0		0	0
Gross Additions to Long-Lived Assets		0	[3]	0	0	[3]
Total Assets	[3]	(527)		(457)	(519)
Investments in Equity Method Subsidiaries	[3]	$ 0		$ 0	$ 0

[1] Include after-tax impairments of $92 million related to certain Energy Holdings investments and additional adjustments related to the sale of PSEG Power’s fossil generation assets in the year ended December 31, 2022. Includes after-tax impairment losses and other charges, including debt extinguishment costs, related to the sale of the fossil generating assets at PSEG Power of $2,158 million in the year ended December 31, 2021. Includes an after-tax gain of $86 million in the year ended December 31, 2020 related to the sale of PSEG Power’s interest in the Yards Creek generation facility. See Note 4. Early Plant Retirements/Asset Dispositions and Impairments for additional information.(C)Includes net after-tax losses of $457 million, $446 million and $58 million in the years ended December 31, 2022, 2021 and 2020, respectively at PSEG Power related to the impacts of non-trading commodity mark-to-market activity, which consists of the financial impact from positions with future delivery dates.

[2] Includes revenues applicable to PSEG Power, PSEG LI and Energy Holdings.

[3] Intercompany eliminations primarily relate to intercompany transactions between PSE&G and PSEG Power. For a further discussion of the intercompany transactions between PSE&G and PSEG Power, see Note 26. Related-Party Transactions.