Earnings Per Share (EPS) and Dividends - Schedule of Basic and Diluted Earnings Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Income (Loss)	[1]	$ 520	$ 139	$ 1,486	$ 2,017
Weighted Average Common Shares Outstanding, Basic (shares)		498	498	498	497
Effect of Stock Based Compensation Awards, Basic (shares)		0	0	0	0
Total Shares, Basic (shares)		498	498	498	497
Net Income, Basic (dollars per share)		$ 1.04	$ 0.28	$ 2.98	$ 4.06
Weighted Average Common Shares Outstanding, Diluted (shares)		498	498	498	497
Effect of Stock Based Compensation Awards, Diluted (shares)		2	2	2	3
Total Shares, Diluted (shares)		500	500	500	500
Net Income, Diluted (dollars per share)		$ 1.04	$ 0.27	$ 2.97	$ 4.03

[1] Includes net after-tax gains (losses) of $17 million and $(17) million for the three months and $(55) million and $750 million for the nine months ended September 30, 2024 and 2023, respectively, at PSEG Power related to the impacts of non-trading commodity mark-to-market activity, which consist of the financial impact from positions with future delivery dates.