Earnings Per Share (EPS) And Dividends (Basic And Diluted Earnings Per Share Computation) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Earnings Per Share, Diluted [Line Items]
Net Income	$ (648)	[1]	$ 1,905	[1]	$ 1,693
Effect of Stock Based Compensation Awards, Basic	0		0		0
Total Shares, Basic	504,000		504,000		504,000
Effect of Stock Based Compensation Awards, Diluted	0		3,000		3,000
Total Shares, Diluted	504,000		507,000		507,000
Weighted Average Common Shares Outstanding Before Various Effects Basic	504,000		504,000		504,000
Weighted Average Common Shares Outstanding Before Various Effects Diluted	504,000		504,000		504,000
Earnings Per Share, Basic	$ (1.29)		$ 3.78		$ 3.35
Earnings Per Share, Diluted	$ (1.29)		$ 3.76		$ 3.33
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,000

[1] 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 and an after-tax loss of $286 million in the year ended December 31, 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants. See Note 4. Early Plant Retirements/Asset Dispositions and Impairments for additional information.(D)Includes net after-tax losses of $446 million and $58 million in the years ended December 31, 2021 and 2020 and a net after-tax gain of $205 million in the year ended December 31, 2019 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.