Earnings Per Share (EPS) And Dividends (Basic And Diluted Earnings Per Share Computation) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Net Income	$ 575	[1]	$ 403	$ 1,474	[1]	$ 1,256	[1]
Weighted Average Common Shares Outstanding, Basic (shares)	504		504	504		504
Effect of Stock Based Compensation Awards, Basic (shares)	0		0	0		0
Total Shares, Basic (shares)	504		504	504		504
Net Income, Basic (dollars per share)	$ 1.15		$ 0.80	$ 2.93		$ 2.49
Weighted Average Common Shares Outstanding, Diluted (shares)	504		504	504		504
Effect of Stock Based Compensation Awards, Diluted (shares)	3		3	3		3
Total Shares, Diluted (shares)	507		507	507		507
Net Income, Diluted (dollars per share)	$ 1.14		$ 0.79	$ 2.91		$ 2.47

[1] Includes an after-tax gain of $86 million in the three months and nine months ended September 30, 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 nine months ended September 30, 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants. See Item 1. Note 4. Early Plant Retirements/Asset Dispositions for additional information.