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	3 Months Ended		9 Months Ended
		May 31, 2022	Mar. 31, 2022	Feb. 28, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Stock Repurchase Program, Authorized Amount									$ 500
Accelerated Share Repurchase percentage of initial shares received			80.00%
Payments for Repurchase of Common Stock			$ 250	$ 250			$ 500	$ 0
Treasury Stock, Shares, Acquired		600	3,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount							3,000
Net Income	[1]				$ 114	$ (1,564)	$ 243	$ (1,093)
Weighted Average Common Shares Outstanding, Basic (shares)					497,000	504,000	498,000	504,000
Effect of Stock Based Compensation Awards, Basic (shares)					0	0	0	0
Total Shares, Basic (shares)					497,000	504,000	498,000	504,000
Net Income, Basic (dollars per share)					$ 0.23	$ (3.10)	$ 0.49	$ (2.17)
Weighted Average Common Shares Outstanding, Diluted (shares)					497,000	504,000	498,000	504,000
Effect of Stock Based Compensation Awards, Diluted (shares)					3,000	0	3,000	0
Total Shares, Diluted (shares)					500,000	504,000	501,000	504,000
Net Income, Diluted (dollars per share)					$ 0.22	$ (3.10)	$ 0.48	$ (2.17)

[1] Includes after-tax impairment losses and other charges related to the sale of the Fossil generating assets at PSEG Power of $1,563 million and $1,936 million for the three and nine months ended September 30, 2021. See Note 4. Early Plant Retirements/Asset Dispositions and Impairments for additional information. Also includes net after-tax losses of $214 million and $478 million for the three months ended September 30, 2022 and 2021, respectively, and $896 million and $718 million for the nine months ended September 30, 2022 and 2021, respectively, related to the impacts of non-trading commodity mark-to-market activity, which consist of the financial impact from positions with future delivery dates. Other includes a $38 million after-tax impairment of assets related to one of Energy Holdings’ generating facilities for the three and nine months ended September 30, 2022.