Earnings Per Share (EPS) And Dividends (Basic And Diluted Earnings Per Share Computation) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		1 Months Ended		2 Months Ended	12 Months Ended
		May 31, 2022	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share, Diluted [Line Items]
Net Income (Loss)	[1]				$ 1,031	$ (648)	$ 1,905
Effect of Stock Based Compensation Awards, Basic					0	0	0
Total Shares, Basic					498,000	504,000	504,000
Effect of Stock Based Compensation Awards, Diluted					3,000	0	3,000
Total Shares, Diluted					501,000	504,000	507,000
Weighted Average Common Shares Outstanding Before Various Effects Basic					498,000	504,000	504,000
Weighted Average Common Shares Outstanding Before Various Effects Diluted					498,000	504,000	504,000
Earnings Per Share, Basic					$ 2.07	$ (1.29)	$ 3.78
Earnings Per Share, Diluted					$ 2.06	$ (1.29)	$ 3.76
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount					3,000
Stock Repurchase Program, Authorized Amount						$ 500
Payments for Repurchase of Common Stock			$ 250	$ 250	$ 500	$ 0	$ 0
Accelerated Share Repurchase percentage of initial shares received			80.00%
Treasury Stock, Shares, Acquired		600	3,000	3,800	7,400

[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.