Financial Information By Business Segments - Financial Information By Business Segments (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Pension lift out settlement charge, net of tax	$ 4	$ 239		$ 239
PSEG Power & Other [Member]
Segment Reporting Information [Line Items]
Gain (loss) on sale, net of tax					$ 92
Operating Segments [Member] | PSEG Power & Other [Member]
Segment Reporting Information [Line Items]
Non trading commodity mark to market gains (losses), net of tax			$ (151)	$ 959	$ (457)